High Resolution Portable Seismic Recorders, Sensors & Software

REF TEK has been thoughtfully designing, manufacturing, and supporting high quality, robust equipment for seismic monitoring systems for over 40 years. An early leader in the market, REF TEK’s team have decades of experience in designing product and systems for your application.

Our products have been field proven in every climatic extreme for applications such as digital telemetry, broadband, short-period and strong motion. Products are heat, humidity and dust tolerant and well suited for installation in Antarctica, the Gobi Desert, and the Monsoon Zone. But our seismic recorders and sensors are also sensitive enough to record motion at great distances and flexible enough to adapt and capture major events close by.

How is that possible?

Every critical sub-system is housed in a completely sealed case and tested for proper operation for ambient temperature form -20 degrees C to + 60 degrees C. Software for critical systems are contained on EPROMs with watchdog timers to prevent system failure. Detailed State of Health (SOH) information is recorded so that you are continuously aware of the state of your system.

REF TEK’s latest generation broadband seismic recorder has a 32-bit A/D performance boost and a large dynamic range.
The compact REF TEK® Colt-PH™ broadband seismometer provides high quality data for scientists conducting earth movement studies.
This flexible and portable broadband seismometer is ideal for portable deployments and rugged enough for long term deployment in local and regional networks.
The 147A Low Noise model is +/- 4g full scale and provides excellent dynamic range which is useful when used with 24-bit digitizers like the REF TEK 130S Series Data Loggers and the 130-MC recorder.

Portable Integrated Seismic Recorder & Accelerometer 

The SMHR2 combines Reftek's latest generation of universal broadband seismic recorder, with the advanced high resolution, fo

Portable Integrated Seismic Recorder & MEMS Accelerometer 

The SMA2 combines Reftek's latest generation of universal broadband seismic recorders, with the advanced high-resolutio

The 151D Bronco Broadband Seismometer is an observatory grade force-balance feedback velocity sensor available with the frequency bandwidth of 0.0083 Hz (120 sec) - 50 Hz.
The uniaxial 131D-01/1 is single-axis ±4g full scale accelerometer with a noise performance of 1.2 μg/rtHz.
The External Relay is a four-relay device compatible with the 180-SMHR2, 180-SMA2, and 180-MC product lines.

Multi-Channel Seismic Recording System

The 180-MC is a fourth-generation digital recording system designed for structural monitoring and to civil engineering requirements.


Software to help you get the most out of your seismic monitoring solution. REF TEK software enhances the ability to retrieve and analyze data captured by the REF TEK Seismic Recorders and Sensors.