SOR Single Point Ultrasonic Level Switch - Manual

Form 712 (05.13) ©SOR Inc. 1/12
The Ultrasonic Point Level Switch energizes/de-energizes
a DPDT relay to indicate liquid presence/absence within
the sensor cavity. Two piezoelectric crystals face each
other across the cavity. The transmitter crystal sends an
ultrasonic signal to the receiver crystal. When liquid fills the
cavity, the receiver crystal detects a strong signal because
liquids are good conductors of ultrasonic waves. When the
cavity is empty, the receiver crystal detects a weaker signal
because air is a poor conductor of ultrasonic waves.
701 Ultrasonic
Point Level Switch
General Instructions
Registered Quality System to ISO 9001
Design and
specifications are
subject to change
without notice.
For latest revision, go to
www.sorinc.com
NOTE: If you suspect that a product is defective, contact the
factory or the SOR
® Representative in your area for a return
authorization number (RMA). This product should only be
installed by trained and competent personnel.
Table of Contents
PC Board Arrangement .........................2
Sensor Installation .......................... 2-3
Remote Cable Connection .................. 4-5
Electrical Connection ........................ 5-6
Failsafe Switch ..................................6
Sensor Test Procedure .........................7
Time Delay .......................................7
Installation Drawings ....................... 8-9
Dimensions .................................... 10
Troubleshooting ............................... 11
Field Replacement - PC Board .............. 11
Replacement Fuses .......................... 12
Spare Parts .................................... 12