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Home > Echotel® 940/941 Compact Ultrasonic Level Switches
 Echotel® 940/941 Compact Ultrasonic Level Switches   Printer Friendly Version
Echotel Model 940 and 941 Ultrasonic Level Switches are compact integral units that utilize pulsed signal technology to perform high or low level measurement in a wide variety of liquid applications. These switches feature a 316 stainless steel tip-sensitive transducer that is offered in a variety of NPT, flanged, and sanitary process connections. The compact electronics are completely encapsulated just above the process fitting.

The Model 940 offers a 1-amp SPDT relay output. The Model 941 has a mA current shift output.
Operating Principle Features Options Downloads Approvals
 
Ultrasonic energy detects the presence or absence of liquid in a tip sensitive transducer gap. The principle behind contact ultrasonic technology is that high frequency sound waves are easily transmitted across a transducer gap in the presence of liquid, but are attenuated when the gap is dry.

Model 940/941 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
  • No calibration or configuration necessary
  • 1 amp SPDT relay output (940), 8/16 mA current shift output (941)
   

  • NPT, ANSI flanges and Tri-Clamp sanitary fittings available
  • Available in lengths from 1 to 100 inches (3 to 250 centimeters)
 
 Literature: (UK English)
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    XP = Explosion Proof  •  IS = Intrinsically Safe  •  NI = Non-Incendive  •  NS = Non-Sparking  •  ELV = EMC/Low Voltage