Features: State-of-the-Art MEMS Force-Balance Accelerometer Low Noise Sensitivity and offset stable over wide temperature range Available in triaxial, uniaxial, and borehole models Applications: Free Field Reference Building Arrays Structural Monitoring Site Response Aftershock Studies

The REF TEK 131A-02/3 Low Noise model is a Triaxial Accelerometer which provides excellent dynamic range useful when used with 24-bit digitizers like the REF TEK 130 Series. These accelerometers use a Micro-Electro-Mechanical System (MEMS) variable capacitance displacement sensor. Because no coils or magnets are used, the accelerometer is inherently stable over temperature, with excellent reliability, linearity, hysteresis, and noise levels. More than 15,000 of the MEMS elements are in use for oil and gas exploration.

The 131A-02/3 model shown here is greater than Ôø‡3g full scale with a low 200 ng2/Hz noise level. This model is best suited for free field applications, such as microzonation, site response, earthquake monitoring, etc.

The 131A-02/3 housing is anodized machined aluminum.  Mounting is accomplished with a single bolt and 3 point leveling screws. The case is sealed to meet IP67 standards for watertight integrity.