Leica Style
L-Bar GMP104C Rain-Proof Monitoring Prism – 5 pcs
The GMP104C Rain-Proof Monitoring Prism delivers exceptional precision with a 30.0mm height offset, +8.94mm Leica prism constant, and a protective rain cover, ensuring reliable performance in all weather conditions for geodetic and civil engineering applications.
$270.00
SKU: MPR04
Secure checkout available with major credit cards, Apple Pay, Google Pay and Shop Pay.
Product Highlights
- Precision Accuracy
- Prism Constant: +8.94mm (Leica), -25.46mm (Other systems).
- Height Offset: 30.0mm ensures precise alignment for monitoring tasks.
- High Beam Stability5 arcseconds: Beam deviation of ensures consistent and reliable measurements.
- Rain-Proof Design
Overview
The GMP104C Rain-Proof Monitoring Prism is a precision instrument designed for demanding geodesy and civil engineering tasks. With a height offset of 30.0mm and a prism constant of +8.94mm (Leica-compatible), the GMP104C ensures unmatched accuracy and reliability. Its robust copper coating and integrated rain cover provide superior performance in challenging weather conditions, making it ideal for outdoor monitoring applications.
The prism delivers exceptional precision with a beam deviation of 5 arcseconds and features a stainless steel screw with a metal holder for secure and stable mounting. Conveniently packaged in sets of 5 pieces, the GMP104C is an essential tool for professionals seeking consistent and durable monitoring solutions.
Specifications
| Model | GMP104C Rain-Proof Monitoring Prism |
|---|---|
| For Total Station | Leica-compatible; adaptable for other systems |
| Height Offset | 30.0mm |
| Leica | +8.94mm |
| Others | -25.46mm |
| Beam Deviation | 5 arcseconds |
| Mount | Stainless steel screw with metal holder |
| Coating | Copper with integrated rain cover |
| Package | 5 pieces per set |
Features
Precision Accuracy
Prism Constant: +8.94mm (Leica), -25.46mm (Other systems).
Height Offset: 30.0mm ensures precise alignment for monitoring tasks.
High Beam Stability5 arcseconds
Beam deviation of ensures consistent and reliable measurements.
Rain-Proof Design
Integrated rain cover protects the prism for reliable performance in wet conditions.
Durable copper coating enhances reflectivity and longevity.
Robust Mounting System
Stainless steel screw and metal holder ensure secure installation and stability.
Convenient Packaging5 pieces
Available in sets of , perfect for large projects or multi-point monitoring.
Multi-Application Usedeformation monitoringstructural surveys
Ideal for , , and outdoor geodetic tasks.
Frequently Asked Questions
Reviews
Previously published reviews
⭐️⭐️⭐️⭐️⭐️ B. Lopez – Verified Buyer – November 23, 2024
"Clear visibility even in adverse weather with rain cover."
⭐️⭐️⭐️⭐️⭐️ L. Hernandez – Verified Buyer – May 27, 2023
"The rain cover is a smart addition, keeping the GMP104 dry and precise."
⭐️⭐️⭐️⭐️⭐️ C. Perez – Verified Buyer – January 5, 2023
"Great value for the quality, highly recommended."
⭐️⭐️⭐️⭐️⭐️ R. Gonzalez – Verified Buyer – October 13, 2022
"Easy setup, clear visibility, makes my work easier."
Compare similar equipment
A structured side-by-side of comparable options in this category to help you choose the right setup for your workflow.
| Specification | This product | |||
|---|---|---|---|---|
| Brand | Leica Style | Metricop | Trimble Style | Metricop |
| Price | $270.00 | $280.00 | $180.00 | $245.00 |
| Availability | In stock | In stock | In stock | In stock |
| Product Type | Surveying Prism | Surveying Prism | Total Station | Total Station |
| Condition | New | New | New | New |
| Recommended Use | Monitoring projects | Monitoring projects | Monitoring projects | Monitoring projects |
| Accuracy | 30.0 mm | 3″ | — | — |
| Range | — | — | — | 500m |
| Software Included | — | Yes | — | — |
| Package Type | — | — | — | Complete Set |
| Delivery Time | 4–7 business days | 4–7 business days | 4–7 business days | 4–7 business days |
Need help choosing the right equipment?
Our team can help compare models, confirm compatibility, and prepare an official quotation.
Related products

Metricop
Monitoring Ball Prism with Magnetic Base
The Monitoring Ball Prism MB01 is a stainless steel, magnetic-base prism compatible with Leica and non-Leica systems. With a prism constant of +17mm/-17mm, 3 arcsecond accuracy, and user-friendly features, it is ideal for precise measurements in various surveying applications.

Trimble Style
Trimble Survey Yellow Monitoring Prism
The Trimble Monitoring Prism is a durable, high-precision tool designed for Trimble total stations, offering exceptional accuracy and reliability for professional surveying applications.

Metricop
Yellow Monitoring Mini Prism, 5pcs In Package
The Yellow Monitoring Mini Prism offers precision measurements, a 500m working range, and compatibility with Leica total stations. Its durable plastic frame and bright yellow design ensure reliability and visibility, with each package containing 5 pieces for cost-effectiveness.

Leica Style
L-Bar GMP104E Monitoring Prism with Yellow Circle – 10 pcs
The GMP104E Monitoring Prism with Yellow Reflective Circle delivers 5 arcsecond accuracy, a 30.0mm height offset, and compatibility with Leica and other total stations. Its durable construction and yellow reflective circle make it a reliable tool for precise monitoring and surveying.
Need help choosing the right equipment?
Request a professional recommendation from Metricop. Our surveying engineers will help you select the right solution and prepare an official quotation.