Meggitt Vibro-Meter PV685 Piezoelectric Accelerometer

Current output: 4 to 20 mA proportional to 0 to 10, 20, 25, 50 or 100 mm/s, ?25 to 90 °C, up to 1000 Hz.

The PV685 piezoelectric velocity sensor is a general-purpose industry standard 4 to 20 mA loop-powered vibration sensor (vibration transmitter) with a piezoelectric sensing element, integrated electronics and a current output. It is available with a sensitivity of 4 to 20 mA proportional to either 0 to 10, 20, 25, 50 or 100 mm/s, and in standard versions or Ex versions. The PV685 is designed and manufactured for use in harsh industrial environments, including hazardous areas (potentially explosive atmospheres).

FeaturesDesigned for general-purpose vibration measurement, typically balance of plant (BOP) machinery such as compressors, gearboxes, motors, pumps and fansIndustry standard 4 to 20 mA loop-powered vibration sensor (vibration transmitter)Quasi-static output signal (4 to 20 mA proportional to 0 to 10, 20, 25, 50 or 100 mm/s) indicating "overall" vibrationTypically connected to a machinery monitoring system for protection applications and/or a control system such as a DCS or PLC for monitoring and/or control applicationsIP67 protection rating

PARAMETER

VALUE (IMPERIAL | METRIC)

Output type

Current loop (4 to 20 mA)

Sensitivity

4 to 20 mA proportional to 0 to 10, 20, 25, 50 or 100 mm/s RMS

Operating temperature range

?13 to 194 °F | ?25 to 90 °C

Frequency response

2 to 1000 Hz

Sensitivity tolerance

±5%

Dynamic measurement range

Up to 50 g

Linearity

<1% up to full scale

Transverse sensitivity

<5%

Resonant frequency

5 kHz

Type of electronics

Integrated

Hazardous area certifications

Ex ia