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Home > Echotel® 961/962 Ultrasonic Liquid Level Switch
 Echotel® 961/962 Ultrasonic Liquid Level Switch   Printer Friendly Version
Increasing demands for compliance with safety systems and overfill protection has mandated more reliable point level measurement. Echotel® Model 961/962 Ultrasonic Level Switches meet these demands with advanced transducer designs, extensive hazardous location approvals, and a new self-test technology.

Model 961 offers the ultimate solution to reliable single point liquid level measurement. This advanced switch uses pulsed signal technology for superior performance in difficult process conditions, and to provide excellent immunity from sources of electrical noise interference. Extensive self-testing of the electronics and transducer make this advanced switch suitable for use in Safety Integrity Level (SIL) 2 loops.

Model 962 is a dual point switch that can be used as a level controller, or to control pumps in an auto fill or auto empty mode. The tip sensitive lower gap performs well in aerated or foamy liquids, and can measure to within 6mm (0.25") of the vessel bottom. The rigidity of the unique flow-through upper gap allows separations of up to 318 cm (125") between the upper and lower transducer gaps.

The Echotel 961/962 is equipped with advanced diagnostics that continuously check the sensor and electronics.
Operating Principle Features Options Downloads Approvals
 
Model 961/962 switches utilize ultrasonic energy to detect the presence or absence of liquid in a single point, tip-sensitive transducer. Ultrasonic contact level technology uses high frequency sound waves that are easily transmitted across a transducer gap in the presence of a liquid media, but are attenuated when the gap is dry.

Model 961/962 switches use an ultrasonic frequency of 2 MHz to perform this liquid level measurement in a wide variety of process media and application conditions.

 

  • Pulsed electronics for excellent performance in difficult process conditions and superior immunity from sources of electromagnetic noise
  • Advanced transducer design provides reliable operation by draining viscous liquids and ignoring foam in turbulent applications
  • Suitable for SIL (Safety Integrity Level) 2 loops (FMEDA analysis data available)
  • Extremely compact unit is easily installed in areas where access space is limited
   

  • Relay output or mA current shift with separate malfunction indication
  • Glass window housing cover
  • Cast aluminum, cast stainless steel or deep drawn stainless steel housings
  • Transducer materials of 316/316L stainless steel, Hastelloy, Monel, Kynar, CPVC or 316/316L SS with 20 Ra sanitary finish
  • ASME B31.1, ASME B31.3 and NACE construction
 
 Literature: (UK English)
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    XP = Explosion Proof  •  IS = Intrinsically Safe  •  NI = Non-Incendive  •  NS = Non-Sparking  •  ELV = EMC/Low Voltage