Strong Motion Accelerometers

Strong Motion Accelerometer Model 131B-01

The REF TEK 131B-01 is a single channel Accelerometer which provides excellent dynamic range useful when used with 24-bit digitizers like the REF TEK 130 series. This accelerometer uses 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 131B-01/1 is a +/- 4g full scale with 2 µg2/Hz noise level.

The 131B-01/1 housing is a powdercoat paint over gold alodine aluminium. Mounting is accomplished with two bolts on one of two axes, thus the sensor may be oriented in any direction. This feature is an ideal application for structure monitoring, allowing for flexibility of installation. The case is sealed to meet IP67 standards for watertight integrity.

Strong Motion Accelerometer Model 131B-01/3

The REF TEK 131B-01/3 low noise model is a triaxial accelerometer which provides excellent dynamic range which is useful when used with 24-bit digitizers such as the REF TEK 130 series.

The 131B-01/3 housing is anodized machined aluminium. Mounting is accomplished with a single bolt and 3 point levelling screws.

Application

• Building Arrays

• Structural Monitoring

• Site Response

• Aftershock Studies

Features

• State-of-the-Art MEMS Force-Balance Accelerometer

• Sensitivity and Offset Stable Over Wide Temperature Range

• Available in Triaxial, Uniaxial, and Borehole Models