Landslide Monitoring Equipment - SlideMinder
Wireline Extensometer Slope Monitoring & Warning System

Geotechnical Instrumentation

Real-Time Slope Monitoring

Keeping us safe since 2003

The SlideMinder Slope Monitoring & Warning System was developed in 2003 by engineers and geologists at the consulting firm Call & Nicholas Inc. to provide clients with a reliable, affordable, and easy-to-use slope monitoring alternative. 

Call & Nicholas Instruments, Inc. has become the leader in Wireline Extensometer Slope Monitoring equipment.

With hundreds of units deployed to date, SlideMinders are reporting the critical data needed for Engineering Design and Operational Safety at locations around the world.

  • SLOPE MOVEMENT ANALYSIS: Software displays measurements and graphs displacement, velocity and system data.

  • ACCURATE REAL-TIME MEASUREMENTS: Measures movement to 0.01cm and monitors throughout slope failure without damage to the extensometer.

  • AUTOMATED WARNINGS & ALARMS: On-site warning beacons, automated text and email alerts.

  • PRECIPITATION MEASUREMENT: Mounted rain gauge records precipitation at the monitoring location.

  • MINIMAL SITE PREP: Small tripod footprint with no required line power.

  • SCALABLE: Start with as little as one extensometer and add more as needed. Additional units are easily added after initial server setup.




2475 N Coyote Dr.
Tucson, AZ 85745

(520) 670-9774

Areas of Practice

Open Pit/Surface

Monitor displacement on benches and dumps in a surface environment using our SlideMinder Extensometers and Repeater/Wireless Strobes.

Civil Applications

Monitor potential landslides using our Manual Extensometers equipped with a visual and audible warning.


Monitor rock separation and fall of ground hazards in underground operations using our FogLights indicators.

Providing clients with a reliable, affordable, and easy-to-use slope monitoring alternative. 


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