Nitrogen-filled Prism (62mm,3")

Product Overview
The GPR112-S4-YE-3S-N2 is a high-precision, nitrogen-filled surveying prism engineered for reliability in demanding field conditions. Its core strengths are optical accuracy (≤3″), long-range capability (up to
2000 m), and rugged, highly visible construction. The model integrates a durable PC canister, precision
K9 glass, and dual-thread mounting options, ensuring broad compatibility with industry-standard total
stations.

1.Optical Accuracy
1)Prism Accuracy
≤3″ arc-seconds, verified by a real-time Zygo interferometer test report included with each unit. This
ensures superior angle measurement reliability.

2)Glass Material
Precision-ground optical K9 glass, providing excellent light transmission and minimal distortion.

3)Measuring Range
Up to 2000 m under normal weather conditions, supporting long-distance operations.

4)Prism Offset
Fixed at either 0 mm or –30 mm, contingent on the specific prism holder used, allowing for flexible
application setups.

2.Physical Specifications
1)Prism Aperture
62 mm (2.44 in), offering a large effective reflective area for robust signal return.

2)Canister Color
Pantone 121C bright yellow (YE), highly visible in daylight and low-contrast backgrounds, reducing the risk
of misplacement and enhancing survey crew efficiency.

3.Environmental Durability
1)Nitrogen-Filled (N2)
The prism is hermetically sealed and backfilled with dry nitrogen, which effectively prevents internal
moisture ingress and fogging, critical for high-humidity or rapidly changing temperature environments.

2)Canister Material
High-grade Polycarbonate (PC), engineered for color-fastness and heat resistance, ensuring structural
integrity and long-term appearance under solar exposure.

3)Coating
Deliberately non-coated to maximize durability and avoid coating degradation, making it suitable
for harsh, abrasive field conditions.

4)Accessories
Includes a white dust-proof cover (optional) and a desiccant agent for additional protection during storage
and transport.

4.Mounting Compatibility
1)Dual Thread System
a)M8 Internal Stainless Steel (SS) Thread
Designed for Geomaster mounting sets (GHT112-8/ALU or GHT112-8/BLK).

b)M20 External Stainless Steel (SS) Thread
Compatible with most standard prism holders, specifically the GHT112 series with M20 thread, and
Geomaster sets (GHT112-20/ALU or GHT112-20/BLK).

2)Universal Compatibility
Fully interoperable with top-brand surveying instruments, ensuring seamless field integration.

5.Customization Services
For project-specific requirements, the following customization options are available:
1)Prism Accuracy: Choose from 2″, 3″, or 5″.
2)Prism Aperture: Available in 64 mm, 62 mm, or 60 mm.
3)Canister Colors: Options include black, bright orange red, and bright yellow (matching original GPR112),
among others.
4)Prism Coatings: Select from non-coated, silver-coated (Ag), copper-coated (Cu), anti-fog (AF), or anti-reflective coated (AR).
Note: Any update would be subject to change without prior notice.(GPR113)
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