The GPR121 Circular Prism with Holder is a premium Swiss-style prism assembly engineered for surveyors who demand high accuracy, long-term reliability, and robust field performance. Designed according to classic Swiss optical principles, this precision instrument delivers consistent measurement results across a wide range of surveying and construction applications. From control surveys and engineering layout to infrastructure projects and routine field measurements, the GPR121 Circular Prism with Holder stands out as a dependable solution trusted by professionals worldwide.
At the heart of the GPR121 Circular Prism with Holder is a high-quality 64 mm circular prism. This prism is available with selectable accuracy options of 2 seconds, 3–4 seconds, or 5–8 seconds, allowing users to choose the optimal configuration based on project requirements. Whether your work demands ultra-high precision or efficient everyday measurement, this Swiss-style prism assembly provides the flexibility needed to adapt to different surveying scenarios without compromising reliability.
Unlike plastic-based assemblies, the GPR121 Circular Prism with Holder features a durable metal holder designed for enhanced stability and long service life. The rigid metal structure minimizes deformation and vibration during measurement, ensuring that the optical axis remains stable even in demanding field environments. In addition, the detachable target adds versatility, making the GPR121 Circular Prism with Holder easier to aim and identify over long distances or in complex construction sites.
A key advantage of this Swiss-style prism assembly is its true Swiss offset design. The GPR121 incorporates a constant 0 mm offset, eliminating the need for offset corrections during setup and data processing. This not only simplifies field operations but also reduces the risk of calculation errors, helping surveyors work faster and with greater confidence. Consistent reference geometry is one of the defining characteristics of a professional Swiss-style prism assembly, and the GPR121 delivers exactly that.
To accommodate different working conditions, the GPR121 is available with multiple prism coating options. The standard copper-coated prism provides reliable signal return for most surveying tasks. For more challenging environments—such as long-distance measurements, poor lighting, or reflective interference—an optional double copper-coated prism with blue coating is available. This advanced coating significantly improves reflectivity and signal strength, enhancing overall measurement accuracy and making this Swiss-style prism assembly suitable for high-demand projects.
Practicality is also an important consideration in the design of the GPR121. Each unit is supplied with a protective carry case that ensures safe storage and convenient transportation. The case protects the prism and holder from dust, moisture, and impact damage, preserving optical performance and extending service life. This level of protection reflects the professional-grade positioning of the GPR121 Circular Prism with Holder as a long-term investment for serious surveyors.
Key Features of the GPR121 Circular Prism with Holder
Swiss Precision and Field Durability
The GPR121 Circular Prism with Holder represents the ideal combination of Swiss precision and rugged field durability. Its precisely manufactured prism ensures consistent optical performance across repeated measurements. At the same time, the robust metal holder allows this Swiss-style prism assembly to withstand harsh site conditions without sacrificing accuracy.
Complete Protection with Carry Case
Every GPR121 Circular Prism with Holder is delivered with a dedicated protective carry case. This case safeguards the prism during transport and storage, reducing the risk of accidental damage. By protecting both optical and mechanical components, the carry case helps maintain the long-term accuracy of this Swiss-style prism assembly.
Why Choose MountLaser’s GPR121 Circular Prism with Holder
At MountLaser, we focus on delivering surveying accessories that combine precision engineering with real-world usability. The GPR121 is manufactured under strict quality control processes to ensure consistent performance and durability. Our experience in optical measurement solutions allows us to refine every detail, from prism coating to holder construction.
Choosing MountLaser means choosing reliability, technical expertise, and responsive support. While we offer a wide range of surveying prisms and assemblies, the GPR121 Circular Prism with Holder remains a standout Swiss-style prism assembly for professionals who value accuracy, efficiency, and long-term value.
Summary
The GPR121 Circular Prism with Holder is a high-performance Swiss-style prism assembly designed for demanding surveying applications. With a precision 64 mm prism, selectable accuracy options, durable metal holder with detachable target, true 0 mm Swiss offset, advanced coating choices, and a protective carry case, it delivers reliable results in both routine and high-precision projects. For surveyors seeking dependable accuracy and professional build quality, the GPR121 Circular Prism with Holder is a trusted choice.
Interested in the GPR121 Circular Prism with Holder? Contact Us Today
If you would like to learn more about the GPR121 Circular Prism with Holder or need assistance selecting the right Swiss-style prism assembly for your projects, we warmly invite you to contact MountLaser. Our team is ready to support you with expert advice and professional solutions.
