Elevate your surveying projects with the Auto Levels AT-B Series, a reliable and precise auto level instrument from Mount Laser.
Auto Levels AT-B Series offers five distinct models ：
Auto Levels ATB2
Auto Levels ATB3
Auto Levels ATB3A
Auto Levels ATB4
Auto Levels ATB4A
to match a wide range of accuracy requirements and project budgets. Whether you are engaged in construction layout, grading, or other leveling tasks, the AT-B Series delivers consistent performance.

When considering an auto level instrument, the competitive Auto Level price of the AT-B Series makes it an exceptional value. We ensure you get a high-quality auto level instrument without compromise, providing an outstanding Auto Level price for professionals who demand both accuracy and affordability.

Auto Levels AT-B Series Specifications

Model No.	ATB2	ATB3	ATB3A	ATB4	ATB4A
Brand	TP/ SK	TP/ SK	TP/ SK	TP/ SK	TP/ SK
Standard Deviation for 1km Double-run Leveling	0.7mm	1.5mm	2.0mm	2.0mm	1.5mm
Telescope Magnification	32X	28X	24X	24X	28X
Telescope Image	Erect	Erect	Erect	Erect	Erect
Shortest Sighting Distance	0.3m	0.3m	0.3m	0.3m	0.3m
View distance error	≤±0.4%	≤±0.4%	≤±0.4%	≤±0.4%	≤±0.4%
Effective Aperture Size of Object Lens	42mm	36mm	36mm	32mm	32mm
Resolution	≤3.0″	≤3.5″	≤3.5″	≤4.0″	≤4.0″
Angle of view	1°25′	1°25′	1°25′	1°25′	1°25′
Focusing Error	≤0.5mm	≤1.0mm	≤1.0mm	≤1.0mm	≤1.0mm
Compensator Type	Magnetic-Damping	Magnetic-Damping	Magnetic-Damping	Magnetic-Damping	Magnetic-Damping
Compensator Working Range	±15′	±15′	±15′	±15′	±15′
Compensating Error	≤0.3″	≤0.5″	≤0.5″	≤0.5″	≤0.5″
Reticle	Wedge Shape	Cross Reticle	Cross Reticle	Cross Reticle	Cross Reticle
Setting Accuracy	±0.3″	±0.5″	±0.5″	±0.5″	±0.5″
Setting Time	≤ 1.5S	≤ 1.5S	≤ 1.5S	≤ 1.5S	≤ 1.5S
Stadia Multiplying Constant	100	100	100	100	100
Stadia Additive Constant	0	0	0	0	0
Sensitivity of Circular Level	8′ / 2mm	10′ / 2mm	10′ / 2mm	10′ / 2mm	10′ / 2mm
Graduation lnterval of Circle	360° or 400 gon optional	360° or 400 gon optional	360° or 400 gon optional	360° or 400 gon optional	360° or 400 gon optional
Water and Dust Proof	IPX6	IPX6	IPX6	IPX6	IPX6
Standard Accessory	Manual, Allen Key, Adjusting Pin, Plastic Case	Manual, Allen Key, Adjusting Pin, Plastic Case	Manual, Allen Key, Adjusting Pin, Plastic Case	Manual, Allen Key, Adjusting Pin, Plastic Case	Manual, Allen Key, Adjusting Pin, Plastic Case
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