Description
The Pulsar Guard 201x series
products are non-invasive ultrasonic sensors designed to detect
process change by listening to the variations in ultrasonic
activity produced.
Application
Applications vary widely and the
sensor can be used anywhere that ultrasonic energy varies with
changes in your process, most activities cause change in the
ultrasonic spectrum. The 201x series units are designed to
reject unwanted signals caused by flow noise or vibration.
Operation
The Pulsar Guard series 201x
sensors all work on the same basic principle, the product
contains a piezo ceramic crystal that gives an electrical output
depending on the minute vibrations caused by ultrasonic
activity. A sensitive amplifier increases the signal from the
crystal element and this is then enveloped to give a smoothed
version of the high frequency signal. The output is a varying
voltage ( 0 to 10V ) with a time constant of 100uS.
