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Ultrasonic Liquid Level Switches

Ultrasonic liquid level switches are used in a wide variety of applications to detect the location of level in a process or storage vessel. These switches can be used in virtually any liquid. A complete offering of materials and mounting configurations are available to meet your application needs.

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Principle Of Operation:

Ultrasonic switches use piezoelectric crystals to transform electrical energy into mechanical motion (sound). The Transmit Crystal sends a pulse of sound through the space between the crystals, to the Receive Crystal. If the space is filled with air, gas or vacuum, the Receive Crystal does not detect the sound pulse. However, if the space is filled with liquid, any liquid, the pulse is detected by the receive crystal, and the switch output changes.

Ultrasonic,Liquid,Level,Switches,Kenco,EngineeringThe Model KUST and KUSG are designed for industrial applications requiring hazardous-area approval. The Model KUSG contains a remote-test feature that allows you to test the operation of the switch and sensor on-demand. The Model KUSO is a low-cost alternative for OEMs (Original Equipment Manufacturers) not requiring hazardous-area certification.

Product Features:
  • Not reliant on chemical properties of the liquid
  • No moving parts
  • Simple installation with no calibration necessary
  • Available in a wide variety of materials and process connections
  • Remote Self-test to verify operation of the electronics and sensor (Model KUSG)
Industries Served:
  • Chemical
  • Petroleum
  • Water & Wastewater
  • Pharmaceutical
  • Pulp & Paper
  • Power
  • Aerospace
Common Applications:
  • Oils and other hydrocarbons
  • Solvents
  • Water
  • Acids
  • Caustics
  • Condensate
  • Clean Liquids
Specifications:
MODEL: KUST

INPUT POWER OPTIONS:
AC = 115 Vac or 230 Vac; 50/60Hz
DC = 12 or 24Vdc
DC (Two-Wire) = 9-30Vdc
OUTPUT OPTIONS:
RELAY = 10A DPDT
TWO-WIRE (Isolated) = 4mA – Dry; 20mA – Wet
TEMPERATURE RANGE:
ELECTRONICS = -20°F to 170°F
SENSOR = -40°F to 300°F
PRESSURE RANGE:
316 SS = Vacuum to 1000psig
TEFZEL® = Vacuum to 100psig
SENSITIVITY (Signal-to-Noise Ratio): 
500:1
REPEATABILITY: 
±2mm
RESPONSE TIME: 
0.5 Seconds (Fixed)

MODEL: KUSG

INPUT POWER OPTIONS:
AC = 115 Vac or 230 Vac; 50/60Hz
DC = 12 or 24Vdc
OUTPUT: 
10A DPDT
TEMPERATURE RANGE:
ELECTRONICS = -20°F to 170°F
SENSOR (Metal)= -40°F to 300°F
PRESSURE RANGE:
METAL SENSORS = Vacuum to 1000psig
NON-METAL SENSORS = Vacuum to 100psig
SENSITIVITY (Signal-to-Noise Ratio): 
1000:1
REPEATABILITY: 
±2mm
RESPONSE TIME: 
0.5 Seconds (Fixed)

MODEL: KUSO

INPUT POWER: 
5 – 30Vdc
OUTPUT: 
1A SPST (Normally Open)
TEMPERATURE RANGE: 
-20°F to 160°F; Up To 212°F (Special)
PRESSURE RANGE: 
Vacuum to 1000psig
CABLE LENGTH: 
12″; For Longer Lengths Consult Factory
MOUNTING: 
3/4″ NPT; For Flanges Consult Factory
SENSITIVITY (Signal-to-Noise Ratio): 
500:1
REPEATABILITY: 
±2mm
RESPONSE TIME: 
0.5 Seconds (Fixed)