//bat.bing.com/action/0?ti=5562332&Ver=2 Ultrasonic Level Sensors

Made in the USA

 Sensing Solutions since 1959 
  ISO 9001 Certified

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Ultrasonic Level Sensors

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U3M-148 - U Series Mini Ultrasonic Sensors
The U3M-148 continuous level sensor is a field-programable, full-range ultrasonic liquid&n..
U3M-148-3/4 - Drum Level Indication
The U3M-148 continuous level sensor is a field-programable, full-range ultrasonic liquid&n..
Ultrasonic Level Sensors

UltrasonicMadison Company offers a complete line of standard and advanced ultrasonic level measurement sensors for liquids. These products continue to meet demanding applications in many markets, at competitive prices.

In addition, Madison Company has the engineering capabilities to design these sensors for your specific non-contact level measurement needs, providing unique considerations for materials to be measured, vessel configuration and system interfacing. The microprocessor-based circuits provide a temperature-compensated signal for improved accuracy. All models have the ability to filter false echoes produced by peripheral obstructions. Continuous level measurement can be provided in a range of 0.33' to 90' (0.10m to 27.4m)with several power and programmability options. Point level can also be obtained using a Madison panel meter or PLC (Programmable Logic Controller).

Go to our Resource Center to view more Non-Contact Level Sensors reference information.

Special Models Available

  • Madison-Omni® Ultrasonic Sensor
  • U3M "Mini Probe" Ultrasonic Level Sensor


  • Pulse ultrasonic technology
  • Non-contact measurement
  • Programmable
  • Field/bench calibration
  • Push-button calibration
  • Elimination of unwanted echoes
  • Microprocessor-based reliability
  • Temperature compensation
  • Self-cleaning sensor face
  • Non-volatile memory (batteries not required)
  • Automatic adjustment of power and sensitivity to any environment
  • Window Out of unwanted echoes
  • Electrical and acoustical noise filters


  • Food and beverage
  • Water and wastewater
  • Chemicals and oils
  • Various liquids and slurries



Power Options AC: 115 VAC, 60 Hz or 230 VAC, 50 Hz (± 20%) 1.7 VA
DC: 12 to 30 VDC, 0.07 Amps max. @ 24 VDC 
R load = (Vs–6)/24 mA
Output 4-20 mA or 20-4 mA, 6.1 uA resolution; 750 ohms (isolated on 4-wire models only) 
Optional RS232 or RS485 communications port
Fuse 0.125 Amps/250 V type 2AG


Accuracy ±0.25% of max. target range (in air)
Beam Angle 6-12 degrees at -3 dB (model dependent)
Loss of Echo Hold 1 minute (programmable 1-4 min.), 22 mA or 2 mA current output
Temperature Compensation Onboard the sensor
Calibration Push-button or optional programmable
Diagnostics (Echo Profile) Via optional programmable port
Dead Zone Range Model dependent or engineered to minimum


Operating Temperature Range -40°F to 140°F (-40°C to 60°C)
Pressure 1 BAR (15 PSIG max.)
Approval Entela, CE (in aluminum enclosure)


Conduit Entry 1/2" NPT hole (PVC only)
Enclosure PVC-94V0, aluminum
Ingress Protection NEMA 4X (IP65)
Mounting Options Swivel socket (cold-rolled steel); PVC flange with 3"-8 or 6"-8 NPT thread

Optional Features

Sanitary designs
Various housing materials (may affect approval)
High-temperature designs
Ball coupler with 3" NPT thread for mounting and easy beam alignment


Consult factory