Rugged high-performance DC accelerometers for critical systems

Measurement Specialties, has introduced two new low-cost DC accelerometers that provide long term, stable measurements in structural and vibration monitoring applications. The rugged, high-performance Model 4020 and Model 4030 deliver MEMS capacitive sensing technologies and state-of-the-art microelectronics at low cost, says the company. By combining a durable, IP65-rated house with attributes such as a low pass filter output that enhances signal processing for stable operation, these accelerometers provide high resolution measurement and long term stability in critical structural applications. Specific uses include low frequency vibration monitoring, motion measurements and structural monitoring as well as tilt and inclination measurement. The low noise, signal conditioned sensors are available in either a ±2 g or a ±6 g full scale dynamic measurement range, and are offered in a dual-axial (Model 4020) or triaxial (Model 4030) configuration. Sensitivity is 1,000mV/g and 333mV/g, respectively, for the ±2g and ±6g dynamic ranges. Across both dynamic ranges, the sensors offer a frequency response of 0Hz to 200Hz, non-linearity of ±1% FSO and transverse sensitivity of more than 3%. Zero acceleration output is 2.5V (±1), excitation voltage is 5VDC to 30VDC and excitation current is 4mA. The sensors’ shock limit is 2,000 g and operating temperature is -40C to +85C with a thermal zero shift of ±4% FSO and a thermal sensitivity shift of ±5%. The moulded, rugged housing is nylon 6-6 with 305 GF and brass inserts at the mounting holes. Each sensor weighs 50 grams and can be securely screw-mounted using two 1/4-inch or M6 screws. An integral #24 AWG cable is included for easy connection.