Introduction; General Features - PCB Piezotronics IMI SENSORS HTTO640B31 Installation And Operating Manual

Introduction

The Model HT 640/641/645/646 B Series High Temperature 4-20mA Sensors combine the capabilities of a
piezoelectric vibration sensor and a 4-20mA vibration transmitter. The sensor outputs a 4-20mA signal that is
proportional to the overall velocity or acceleration of the machinery. Ideal for monitoring the vibration of process
equipment such as fans, motors and pumps, the output of the sensor is used for process control or predictive
maintenance. There are many options in this series. Please refer to specific specification sheets for further
details.

General Features

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Expanded Temperature Range from –40°C to +125°C
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Imbedded Piezoelectric Accelerometer for improved accuracy and frequency response.
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Vibration range can be in Acceleration or Velocity.
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Allows for continuous vibration monitoring of critical applications.
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Reduces sophisticated vibration analysis requirements.
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RV (Raw Vibration) option for conducting frequency analysis and machinery diagnostics.
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TO (Temperature Output) option via an independent 4-20mA loop.
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Readily interfaces to existing process control and predictive maintenance equipment.
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Rugged stainless steel construction for applications in harsh environments.
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Flexible design allows for various custom requirements.
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