Optical Survey Prism with lightweight metal flange mount

Optical Survey Monitoring Prism with lightweight metal flange mount, for use with Topcon, Sokkia, Leica, Trimble and other total stations


Availability: 70 in stock

Product Information

Specto Technology is your one source for AMTS monitoring prisms and is proud to provide you with:

  • Light weight monitoring prisms for purchase
  • Customized training for you and/or your subcontractors. Click here to view a list of training classes.
  • Best-in-class hosted data solutions to keep your data moving wirelessly from the field to your fingertips
  • Exceptional customer service and support

The light weight, low profile monitoring prism is secured onto a light weight aluminum L-shaped flange.

The light weight design allows the prism assembly to be epoxied to a surface when anchor bolts are not able to be used.

  We carry stock of Light Weight Monitoring Prisms. Same-day shipping or pickup is available!


  • Small size
  • Prism diameter:  24.5mm
  • Measuring distance:  2,000m
  • Offset:  -25.4mm (Topcon, Trimble), +8.92 (Leica)
  • Accuracy:  2 arc sec
  • Hermetically sealed prism
  • Lightweight, wide aluminum plate suits epoxy bonding 
  • Option to remove prism if flange is damaged during removal 
  • Prism has ability to swivel 360° 


  • 25.4mm diameter Prism 
  • Prism accuracy: 5 arc seconds 
  • Prism offset (Leica): +8.92mm 
  • Prism offset (Trimble & Others): -25.4mm 
  • Measuring range: 2,000m 
  • Outer dimensions: 5.94” x 2.00” x 1.44” 
  • Weight: 3.4 oz (90g) 


  • Possible to secure to surfaces with epoxy due to light weight
  • Discrete due to low profile and small prism size


  • Monitoring prisms are designed for use with an automated total station (AMTS) to monitor settlement and deformation of roads, buildings, pavement, and other surfaces.


Light Weight Optical Prism Datasheet
Prisms for Total Stations Comparison Brochure

User Manual