Reflective Target & Prism

Model No. Target Size Target Brand Bonding Size for option Main material Main body size Side
RT010 10×10mm 3M with Adhesive 20/30/40/50/60/80/100/150mm —— —— ——
RT010M 10×10mm 3M with Magnetic 20/30/40/50/60/80/100/150mm —— —— ——
RT010S 30×30mm 3M —— —— High-Strength Nylon 100×35×30mm Single Side
RT010D 30×30mm 3M —— —— High-Strength Nylon 100×35×30mm Dual Side
RT010SD 30×30mm 3M —— —— High-Strength Nylon 100×35×30mm Dual Side
RT102-A01 OD50mm 3M —— —— High-Strength Nylon 5/8"-11 ——
RT102-A02 OD50mm 3M —— —— High-Strength Nylon 3/8"-19 ——
RT102-A03 OD50mm 3M —— —— High-Strength Nylon M8 ——
RT103 OD60mm 3M —— —— High-Strength Nylon Swiss spigot(Round Base) ——
RT103-A01 OD60mm 3M —— —— High-Strength Nylon 5/8"-11 ——
RT103-A02 OD60mm 3M —— —— High-Strength Nylon 3/8"-19 ——
RT103-A03 OD60mm 3M —— —— High-Strength Nylon M8 ——
RT104 60×60mm 3M —— —— Aluminum 5/8"-11 ——
RT105 OD60mm 3M —— —— High-Strength Nylon Quick Release ——
Model No. Prism Diameter Material Coating Accuracy Type Mount / Thread Features
G127 12.7mm Glass Copper Coated 2" / 3-4" / 5-8" Mini Prism Compact size
G178 17.8mm Glass Copper Coated 2" / 3-4" / 5-8" Mini Prism Lightweight
G254 25.4mm Glass Copper Coated 2" / 3-4" / 5-8" Standard Prism General surveying
G381 38.1mm Glass Silver Coated 2" / 3-4" / 5-8" Standard Prism High reflectivity
G640L 64mm Swiss-Style Glass Copper / Blue 2" / 3-4" / 5-8" / 10" High Precision Swiss-Style compatible
G640T 64mm Glass Standard 2" / 3-4" / 5-8" / 10" Economic Cost-effective
GPR1 Glass Copper / Blue 2" / 3-4" / 5-8" / 10" Swiss-Style Type Without logo
GPR1L Glass Copper / Blue 2" / 3-4" / 5-8" / 10" Swiss-Style Type With shell & light
PB640R 64mm Glass 2" / 3-4" / 5-8" / 10" Mounted Prism Red shell
PB640RL 64mm Glass 2" / 3-4" / 5-8" Mounted Prism Red shell + light
PB640Y 64mm Glass 2" / 3-4" / 5-8" / 10" Mounted Prism Yellow shell
PF640R 64mm Glass Copper + Silver 2" / 3-4" Long Range Prism M20×2 Waterproof, 800–1500m
PJ640B 64mm Glass 3-4" / 5-8" Metal Prism Metal shell
PL640 64mm Glass 2" Prism Head Optional color
Model No. Prism Type Prism Diameter Coating Accuracy Mount Type Structure Features
6603-05 Monitoring Prism 2" / 3-4" / 5-8" Seco Style Standard Monitoring application
MP096-30 Monitoring Prism 12.7mm Copper 2" / 3-4" / 5-8" Back Plate 30° Angle 100×30mm plate
MP096-45 Monitoring Prism 12.7mm Copper 2" / 3-4" / 5-8" Back Plate 45° Angle High visibility
TRM02 Monitoring Prism 2" / 3-4" / 5-8" Tr-Style Style Standard Tr-Style compatible
GPR112S Monitoring Prism Set 2" / 3-4" Swiss-Style Style Set Complete kit
Model No. Prism Type Coating Accuracy Prism Size Structure Compatibility Features
GMP104 (MP110) L-Bar Prism Copper 3-4" / 5-8" / 10" Standard L-Bar Universal Standard model
EGMP104 (MP110-L) L-Bar Prism Copper 3-4" / 5-8" / 10" Standard Extended L-Bar Universal Extended arm
GMP104C (MP110C) L-Bar Prism Copper 3-4" / 5-8" / 10" Standard L-Bar Universal Waterproof cap
GMP104H (MP110H) L-Bar Prism Copper 2" / 3-4" / 5-8" Standard L-Bar Universal High quality version
GMP104HB (MP110B) L-Bar Prism Silver 2" / 3-4" / 5-8" 38.1mm L-Bar Universal Big prism
GMP104HD (MP110D) L-Bar Prism Copper 2" / 3-4" / 5-8" Standard Double Side Universal Dual face
GMP104HM (MP110S) L-Bar Prism Copper 2" / 3-4" / 5-8" 12.7mm L-Bar Universal Mini prism
GMP104HR (MP110HC) L-Bar Prism Copper 2" / 3-4" / 5-8" Standard L-Bar Universal Waterproof cap
GMP104HT (MP110T) L-Bar Prism Silver 2" / 3-4" / 5-8" Standard L-Bar Tr-Style Tr-Style style
GMP104HV (MP110V) L-Bar Prism Copper 2" / 3-4" / 5-8" Standard L-Bar Universal Visibility ring
GMP104HW (MP110W) L-Bar Prism Copper 3-4" / 5-8" / 10" Standard L-Bar Universal Waterproof ring
GMP104HWV (MP110HWV) L-Bar Prism Copper 2" / 3-4" / 5-8" Standard L-Bar Universal Waterproof + visibility
GMP110HR (MP110R) L-Bar Prism Copper 2" / 3-4" / 5-8" / 10" Standard L-Bar Universal Standard type
Model No. Prism Diameter Coating Accuracy Pole Type Pole Length Lock Type Features
M1500GP Silver 2" / 3-4" Stainless Steel (OD9mm) 300mm × 5 (1.5m) Dual Lock High stability
M1500MP Silver 2" / 3-4" Stainless Steel (OD9mm) 300mm × 5 (1.5m) Single Lock Lightweight
MG1500SL Silver 2" / 3-4" Stainless Steel (OD9mm) 300mm × 5 (1.5m) Standard Classic model
MG1000SPT Silver 3-4" Stainless Steel (OD9mm) 300mm × 5 (1.5m) Standard Cost-effective
SP060 Silver 3-4" / 5-8" Aluminum Pole Standard With soft bag
SP061M Silver 3-4" / 5-8" Aluminum Pole Standard Middle bubble
SP061S Silver 3-4" / 5-8" Aluminum Pole Standard Side bubble
SP063A Copper 2" / 3-4" / 5-8" / 10" Aluminum (4 Sections) 300mm × 4 Standard Offset 0mm
SP063B Copper 2" / 3-4" / 5-8" / 10" Aluminum (4 Sections) 300mm × 4 Standard Offset 17.5mm
SP063C Copper 2" / 3-4" / 5-8" / 10" Aluminum Standard Offset 0 / -30mm
SP065D Silver 2" / 3-4" / 5-8" Stainless Steel (OD9mm) 300mm × 5 (1.5m) Dual Lock High stability
SP065S Silver 2" / 3-4" / 5-8" Stainless Steel (OD9mm) 300mm × 5 (1.5m) Single Lock Lightweight
SP066 Silver 3-4" / 5-8" Aluminum (OD12mm) 300mm × 5 (1.5m) Standard Yellow color
SP067 Silver 3-4" / 5-8" Aluminum Standard With soft bag
SP068 Copper 3-4" / 5-8" Aluminum Standard Copper coating
SP069 Silver 3-4" / 5-8" Stainless Steel (OD9mm) 300mm × 5 (1.5m) Standard Yellow body
Model No. Prism Type Material Accuracy With Pole Compatibility Structure Features
5910-24RW 360 Prism Steel Pole 3-4" Yes Universal Pin Pole Red & White, no scale
5910-24YL 360 Prism Steel Pole 3-4" Yes Universal Pin Pole Yellow, cm scale
A7 360 Prism No Universal Standard Basic model
ATP1 360 Prism Standard No Universal Normal Standard version
ATP1M 360 Prism Metal No Universal Reinforced Durable body
ATP1MR 360 Prism Aluminum No Universal Reinforced Anti-collision ring
ATP1NR 360 Prism Nylon No Universal Reinforced Wear-resistant joints
ATP2S 360 Prism Yes Topcon With Pole Topcon style
ATP3 360 Prism 3-4" / 5-8" No Universal Standard General use
GRZ4 360 Prism Standard No Swiss-Style Normal Swiss-Style style
GRZ4M 360 Prism Metal No Swiss-Style Reinforced Durable design
GRZ4SL 360 Prism No Swiss-Style L Adapter 5/8"-11 thread
GRZ4SS 360 Prism No Swiss-Style S Adapter 5/8"-11 thread
GRZ101 360 Mini Prism Yes Swiss-Style With Pole & Bubble Complete set
GRZ101S 360 Mini Prism Yes Swiss-Style With Pole & Bubble Standard set
GRZ101SA 360 Mini Prism Nylon Frame Yes Swiss-Style Reinforced Axis + reinforced frame
GRZ122 360 Prism Standard No Swiss-Style Standard Classic Swiss-Style type
GRZ122M 360 Prism Metal No Swiss-Style Reinforced Metal version
GX360 360 Prism ±1.5mm No Swiss-Style High Precision Premium model
MPR122 360 Prism ±1.5mm / 3-4" No Swiss-Style Standard Swiss packing
MPR122R 360 Prism ±1.5mm / 3-4" No Swiss-Style Reinforced Anti-collision ring
ST360 360 Prism No Universal Standard Basic model
TR360A 360 Prism 3-4" / 5-8" No Tr-Style Standard Tr-Style compatible
TR360B 360 Prism 3-4" / 5-8" No Tr-Style Standard Cost-effective
TR360C 360 Prism 3-4" No Tr-Style Standard Compact version
Zero 220P 360 Prism Yes Universal With Pole Complete set
Model No. Prism Type Accuracy Coating Shell / Target Adapter / Thread Feature Package
C-GPH1 Swiss-Style Prism 2" / 3-4" / 5-8" / 10" Copper / Blue Without Target Standard Carton
C14B-YY Prism Assembly 3-4" / 5-8" Yellow Shell Without Target Carton
C15B-RR Prism Assembly 3-4" / 5-8" / 10" Red Shell & Bracket Without Target Carton
C34B-RR Triple Prism 3-4" / 5-8" / 10" Red Shell With Pole Triple Prism Set
GPH1 Swiss-Style Prism 2" / 3-4" / 5-8" / 10" Copper / Blue Standard Soft Bag / Carton
GPR111 Swiss-Style Prism 2" / 3-4" / 5-8" / 10" Copper / Blue Standard Soft Bag / Carton
GPR121 Metal Prism 2" / 3-4" / 5-8" Copper / Blue Metal Body Heavy Duty Soft Bag / Carton
Z14B-YW Prism Assembly 3-4" / 5-8" Yellow Shell + White/Black Target 5/8"-11 Dual Lock Soft Bag
Z14BS-RG Prism Assembly 3-4" / 5-8" / 10" Red Shell + Green/Black Target 5/8"-11 Stainless Adapter Soft Bag
Z14BS-RR Prism Assembly 3-4" / 5-8" / 10" Red Shell + Red/White Target 5/8"-11 Standard Soft Bag
Z14TB Prism Assembly 3-4" / 5-8" / 10" 5/8"-11 Standard Soft Bag
Z14TRB Tr-Style Prism 2" / 3-4" Tr-Style Style
Z14SK-RR Sokkia Prism 3-4" / 5-8" Red Shell + Red Target Sokkia Style
Z14UC-YG Prism Assembly 2" / 3-4" / 5-8" / 10" Green Target Standard Soft Bag
Z15B-RW Prism Assembly 3-4" / 5-8" / 10" Red Shell + White Target Standard Soft Bag
Z34B-RY Triple Prism 3-4" / 5-8" / 10" Red Shell + Yellow Target Triple Set
Reflective Target Prism
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RT010
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Reflective Target Prism
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RT010M
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Reflective Target Prism
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RT101S
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Reflective Target Prism
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RT101D
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Reflective Target Prism
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RT101SD
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Reflective Target Prism
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RT102
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Reflective Target Prism
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RT103
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Reflective Target Prism
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RT104
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Reflective Target Prism
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RT105
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Reflective Target Prism
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RT107
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Reflective Target Prism
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RT108
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Reflective Target Prism
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RT111
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Reflective Target Prism
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RT110
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Reflective Target Prism
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Reflective Target Prism
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Reflective Target Prism
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G640L
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Reflective Target Prism
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Reflective Target Prism
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G640T
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Reflective Target Prism
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PA254
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Reflective Target Prism
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PB254
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Reflective Target Prism
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PA381
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Reflective Target Prism
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PB381
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Reflective Target Prism
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GPR12
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Reflective Target Prism
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PJ640B
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Reflective Target Prism
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PB640Y
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Reflective Target Prism
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PB640R
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Reflective Target Prism
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PB640RL
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Reflective Target Prism
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PC640R
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Reflective Target Prism
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PF640R
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Reflective Target Prism
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Reflective Target Prism
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GPR1L
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Reflective Target Prism
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Weather-resistant Mini Prism
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Reflective Target Prism
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High-Precision Mini Prism
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Reflective Target Prism
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High-Precision Monitoring Prism
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Reflective Target Prism
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Adjustable Prism Stand
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Reflective Target Prism
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High-Strength Nylon Mini Prism
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Reflective Target Prism
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Compact Angled Mini Prism
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Reflective Target Prism
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Low-Profile Road Monitoring Prism
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Reflective Target Prism
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Rod Monitoring Prism
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Reflective Target Prism
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Standard Quality Die-Cast Aluminum Body
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Reflective Target Prism
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High-Quality Machined Anodized Aliuminum Body
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High-Quality Anodized Aluminum Body With Waterproof Ring
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Reflective Target Prism
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High-Quality Anodized Aluminum Body Water Resistance
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Reflective Target Prism
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High-Quality Micro Prism For Indoor Monitoring
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High-Quality Anodized Aluminum Body - Dual-Sided Design
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Reflective Target Prism
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High-Quality American-Style Design
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Reflective Target Prism
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38.1MM High-Precision Mini Prism
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Reflective Target Prism
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Swiss-Style Monitoring Prism Set Gpr112S
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Reflective Target Prism
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American-Style 62MM Long-Range Monitoring Prism
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Reflective Target Prism
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Sliding Mini Prism With Pole
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Reflective Target Prism
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SP063 Mini Prism With Pole
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Reflective Target Prism
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High Mini Prism With Pole
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Reflective Target Prism
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SP065 Sliding Prism with Pole
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Reflective Target Prism
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SP066 Mini Prism with Pole
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Reflective Target Prism
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SP067 Sliding Prism with Pole
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Reflective Target Prism
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SP068 Sliding Prism With Pole
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SP069 Mini Prism with Pole
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GMP111 Mini Prism With Pole
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MG000SPT Top Sliding Prism with Pole
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M1500 Top Sliding Prism with Pole
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MG1500SL Top Mini Prism with Pole
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Reflective Target Prism
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Swiss-style 360° Prism
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Swiss-Style 360° Prism
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Reflective Target Prism
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High-Quality Metal Design With Axis
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GRZ101 Medium Quality Metal Design
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Reflective Target Prism
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GRZ101S Medium Quality Metal Design
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Reflective Target Prism
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GRZ101SA High-Quality with Inner Bracket
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Reflective Target Prism
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Japanese-Style 360° Prism
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Reflective Target Prism
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ATP3 360° Prism Metal Design
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Reflective Target Prism
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A7 360° Prism Metal Design
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Reflective Target Prism
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Z-220P Zero 220P 360° Prism with pole
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Reflective Target Prism
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ST360 360° Prism with Pole
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Reflective Target Prism
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ATP2S 360° Prism with Pole
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Reflective Target Prism
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American-Style 360° Prism
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Reflective Target Prism
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Ameeican-Style 360° Prism
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Z15B-YW
Offset:0/-30mm
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Reflective Target Prism
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Z15B-YY
Offset:0/30mm
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Reflective Target Prism
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Z15B-RW
Offset:0/-30mm
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Reflective Target Prism
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Z15B-RY
Offset:0/-30mm
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Reflective Target Prism
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Offset:0/-30mm
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Reflective Target Prism
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Z15UB-YY
Offset:0/-30mm
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Reflective Target Prism
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Z15UB-RO
Offset:0/-30mm
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Reflective Target Prism
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Z15UB-RR
Offset:0/-30mm
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Reflective Target Prism
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Z5U-RO
Offset:0/-30mm
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Reflective Target Prism
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Z15U-YY
Offset:0/-30mm
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Reflective Target Prism
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Z15UD-RR
Offset:0/-30mm
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Reflective Target Prism
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Z15UD-YB
Offset:0/-30mm
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Reflective Target Prism
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Z14B-YW
Offset:0/-30mm
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Reflective Target Prism
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Z14B-YY
Offset:0/-30mm
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Reflective Target Prism
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Z14U-RO
Offset:0/-30mm
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Reflective Target Prism
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Z14D-YY
Offset:0/-30mm
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Reflective Target Prism
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Z14UB-YY
Offset:0/-30mm
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Reflective Target Prism
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Z14UB-RO
Offset:0/-30mm
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Reflective Target Prism
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Z14UC-YG
Offset:0/-30mm
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Reflective Target Prism
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Z14UC-YY
Offset:0/-30mm
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Reflective Target Prism
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Z14TB
Offset:0mm
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Reflective Target Prism
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Z14BS-RG
Offset:0/-30mm
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Reflective Target Prism
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Z14BS-RR
Offset:0/-30mm
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Reflective Target Prism
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Z14PT
Offset:0
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Reflective Target Prism
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Z14SK-RR
Offset:0
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Reflective Target Prism
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Z14SK-YY
Offset:0
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Reflective Target Prism
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Z14UE-BR
Offset:0
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Reflective Target Prism
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Z14UE-BY
Offset:0
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Z34B-YY
Offset:0/-30mm
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Reflective Target Prism
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Z34B-RY
Offset:0/-30mm
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Reflective Target Prism
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Z34B-YY
Offset:0/-30mm
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Reflective Target Prism
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C34B-RR
Offset:0/-30mm
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Reflective Target Prism
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Z14TRB
Offset:-35mm
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Reflective Target Prism
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Z14US
P/N:6402-06
Offset:0/-30mm
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Reflective Target Prism
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CPH3
Offset:0mm
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Reflective Target Prism
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GPR111
Offset:0mm
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Reflective Target Prism
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GPH1
Offset:0mm
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Reflective Target Prism
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GPR121
Swiss Offset:0mm
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Reflective Target Prism
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GPH1P
Swiss Offset:0mm
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Package

The reflective target prism packaging is designed with a durable soft-shell structure and reinforced stitching to provide reliable protection for reflective target prism equipment against impact, dust, and scratches. Its multi-compartment layout with elastic holders keeps reflective target prisms and accessories neatly organized and securely in place, while the compact, foldable design with an adjustable shoulder strap ensures easy portability and efficient use in field operations involving surveying prisms.

How does it work?

Principle of the Prism

Reflective target prisms operate on the principle of retroreflection, where the reflective target prism returns light or laser signals emitted by total stations precisely back to their source, ensuring accurate distance and position measurement. With precision optical components, the surveying prism maintains a reflected beam that remains parallel to the incident beam regardless of the angle of entry, ensuring stable and reliable measurement performance in reflective target prism applications.

Stability

Tripod

The tripod provides a stable and secure base for mounting surveying equipment, ensuring that the prism setup remains steady and free from external disturbances during measurement.

Surveying Tribrach and Adapter Solutions

Supporty

Prism Pole

The prism pole provides stable support and adjustable height for the prism, ensuring proper alignment with the instrument and improving measurement efficiency and accuracy in various field conditions.

Common Questions & Professional Answers

Using an incorrect prism constant introduces a systematic offset into every distance measurement recorded during the survey. The total station applies the constant as an additive correction to the raw EDM reading, so any error in the constant propagates uniformly across all observations.

⚠ Worked Example

A −30 mm prism was used, but the controller was set to −17.5 mm. The instrument added only −17.5 mm instead of −30 mm, so every recorded distance is 12.5 mm too long. To correct the data, subtract 12.5 mm from all slope distances before recomputing coordinates.

Correction formula:

Δ = PCactual − PCset

If Δ is negative, subtract |Δ| from all distances. If positive, add Δ. The corrected distance is then used to recompute northing, easting, and elevation.

Software-based correction (recommended):

  • 1Open the raw field file in your office software (Trimble Business Center, Leica Geo Office, etc.).
  • 2Locate the prism constant setting in the job properties or raw observation editor.
  • 3Update the constant to the correct value and trigger a full recomputation — all point coordinates will be recalculated automatically.

Best practice: Before each survey session, verify the prism constant by measuring a calibrated baseline with the prism constant set to 0 mm, then comparing the measured distance against the known value. The difference equals the true prism constant.

From a purely optical standpoint, yes — standard circular prisms achieve higher centering accuracy than most 360° wide-angle prisms. A 360° prism is an assembly of 6–7 individual corner-cube prisms bonded together; the alignment tolerances of each element accumulate, resulting in a wider pointing error envelope.

Prism Type Centering Accuracy Typical Use Case Verdict
Standard circular prism (e.g., GPR1) ±1.0 mm Control surveys, precise layout Highest Precision
High-precision 360° prism (e.g., GRZ4) ±2.0 mm (any face) Robotic topo, one-man operation Excellent
Standard 360° prism ±2.0 mm (front face)
±5.0 mm (side/rear)
General topographic surveys Good for Topo
Mini 360° prism ±1.5 mm Compact robotic tracking Very Good

In practice, refusing to use a 360° prism for routine topographic surveys is counterproductive. The efficiency gain from omnidirectional tracking with a robotic total station far outweighs the marginal accuracy difference for centimeter-level topo work. However, for high-order control networks, precision deformation monitoring, or industrial alignment, a standard nodal prism is the correct choice.

💡 Pro Tip

When using a standard 360° prism, shooting toward the face marked with the alignment arrow (yellow indicator) reduces pointing error to ±2 mm — approaching high-precision 360° prism performance.

Cross-brand use is technically feasible and widely practiced, particularly in monitoring and industrial surveying. The EDM laser wavelengths of major manufacturers are similar enough that the reflectivity difference between copper-coated and silver-coated prisms is negligible in practice.

The critical requirement is correctly entering the prism constant for the specific prism being used, regardless of brand. The most common source of error when mixing brands is the Leica "Swiss constant" convention:

Brand / System Nominal Constant Absolute Constant Coating
Leica GPR1 (Swiss-style) 0 mm (Swiss) −34.4 mm Copper
Trimble / Topcon standard −30 mm (absolute) −30.0 mm Silver
Japanese-style 360° (e.g., ATP1) −7 mm (absolute) −7.0 mm Silver
Swiss-style 360° (e.g., GRZ101) +30 mm (Swiss) −4.4 mm Mixed
⚠ Critical Warning

If you use a Leica GPR1 (Swiss constant = 0 mm) with a Trimble total station and enter 0 mm as the constant, you will introduce a −34.4 mm systematic error into all distances. Always enter the absolute constant (−34.4 mm) in non-Leica instruments.

MountLaser prisms are manufactured to universal absolute constant standards, making them straightforward to configure on any major brand of total station without proprietary software dependencies.

At distances under 50 m, even a 12.7 mm micro-prism should be reliably acquired by ATR (Automatic Target Recognition). Persistent lock failures at short range almost always point to one of the following causes:

  • 1Uncalibrated ATR collimation. The ATR optical axis may have drifted out of alignment with the telescope crosshair. Run the instrument's built-in collimation calibration procedure (compensator → collimation → trunnion axis tilt → ATR collimation, in that order).
  • 2Contaminated optics. Dust, condensation, or ice on the prism face or the instrument objective lens dramatically reduces the signal-to-noise ratio. Clean both surfaces with a lens cloth before retrying.
  • 3Environmental interference. Highly reflective objects near the prism (chrome bumpers, glass windows, wet surfaces) can confuse the ATR algorithm. Shield the prism or reposition the instrument if possible.
  • 4Passive mode active. Confirm the instrument is set to active tracking mode, not passive mode. In passive mode, the instrument will not emit the tracking signal.
  • 5Beam divergence at long range. At distances beyond 300–500 m, the EDM beam footprint may exceed the prism aperture. Upgrade to a larger-diameter prism (38 mm or 62 mm) for long-range monitoring applications.

Recommended diagnostic sequence: Clean optics → manually aim at prism center → attempt manual lock → if successful, run ATR calibration → retest automatic lock. If the instrument still fails to lock after calibration, contact the manufacturer for a factory service check.

This is a well-documented phenomenon caused by the combination of extreme zenith angle and very short measurement distance. Two independent error mechanisms are at work simultaneously:

1. Cosine error in reflectorless mode: At steep vertical angles, the EDM laser beam strikes the target surface obliquely. The beam footprint becomes an ellipse rather than a circle, and the centroid of the returned signal shifts relative to the crosshair aim point. At 2 m distance and a 45° zenith angle, this shift can easily exceed 5 mm in elevation.

2. Prism orientation error: A 360° or mini-prism that is not precisely pointed toward the instrument introduces a cosine-related ranging error that grows with the angle of incidence. At extreme angles, even a small misalignment of the prism face produces measurable elevation discrepancies.

Measurement Mode Optimal Condition Risk at Steep Angle
Reflectorless (DR) Near-horizontal, flat surface, >4 m distance High error risk
Mini-prism (e.g., 12.7 mm) Prism leveled, near-horizontal angle Moderate risk
Standard prism (25.4 mm+) Prism leveled, near-horizontal angle Lower risk
💡 Best Practice

For critical elevation measurements in confined spaces, set the total station and prism rod at the same height to minimize the vertical angle. When this is not possible, use a prism with a precise circular vial and ensure it is perfectly plumb before recording the observation. For distances under 2 m, a direct steel tape measurement is often more reliable than any EDM mode.

Mount Laser is a leading integrated manufacturer specializing in surveying instruments and accessories, as well as laser levels and accessories. Headquartered in Changzhou, Jiangsu Province, the company operates a 7,500 m² modern manufacturing facility and employs a dedicated team of over 150 skilled professionals. As a comprehensive solution provider, Mount Laser’s product portfolio spans 13 core categories: Auto Levels, Calibration & Testing Instruments, Prisms, Surveying Accessories, Scanner Targets, GNSS, Surveying Poles, Leveling Staffs, Tripods & Bipods, Line Lasers, Rotary Lasers, Laser Level Accessories, and Agent Sales services. Committed to quality and innovation, Mount Laser serves as a trusted partner to surveying and construction professionals worldwide.

MOUNT LASER (CHANGZHOU) INSTRUMENT CO.,LTD

A Chinese Top-3 Manufacturer in surveying accessories!

12 years experience

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FAQs

We are a professional manufacturer established in 1999, exporting worldwide with a strong presence in key markets including South America, Oceania, Western Europe, South Asia, and the Middle East, while continuously expanding into emerging markets such as North America, Eastern Europe, and Africa. With over two decades of industry experience, we deeply understand the diverse needs of customers across different regions and are committed to providing reliable measurement solutions to our global partners.

Mount Laser is a leading manufacturer serving the surveying accessories, construction, GPS, and GNSS industries. Our competitive advantage lies in our integrated production capabilities.

We understand that international buyers often need to test the market first. For standard products, we offer flexible MOQs—small trial orders are welcome. For deep customization projects, MOQ depends on the complexity (e.g., mold development, PCB changes). We are happy to discuss a roadmap that starts with small orders and scales up as your business grows.

Absolutely. As a manufacturer with strong R&D capabilities, we specialize in deep customization services. We can tailor products according to your specific requirements.

We are a manufacturer with in-house trading capabilities (industry & trade integrated). Headquartered in Changzhou, Jiangsu Province, we operate a 7,500 m² modern facility with over 150 skilled professionals. Unlike pure trading companies, we control the entire production process—from R&D and mold design to assembly and quality control—ensuring competitive pricing, stable supply, and full customization flexibility for our global clients.

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Dr. Mariel Senry

neurologist

13 years experience

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Family medicine

20 years experience

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orthopedic surgeon

16 years experience

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Dr. Shi Yon

Cardiovascular Specialist

11 years experience