Picture of ToughSonic CHEM 20 Level & Distance Sensor

ToughSonic CHEM 20 Level & Distance Sensor

Maximum Range 20 Feet (6.1 Meters)

ToughSonic CHEM 20 Level Sensor Features

  • Non-contact level measurement
  • Rugged construction, IP68 rated
  • Indoor or outdoor uses
  • Top and bottom mounting threads
  • Five outputs plus serial data
  • Serial data-only models
  • Temperature compensation
  • PC configurable with free SenixVIEW software with nearly 80 sensor parameters that can be changed to tailor the sensor to your application

ToughSonic CHEM 20 Level Sensor Best Applications

  • Chemical tank levels
  • Benign liquid tank levels
  • Tanks up to 20-ft (6.1 m) tall
  • 1-1/2 inch NPT or BSP tank fittings
Part Number: LVL-300-485


The ToughSonic CHEM 20 is a rugged ultrasonic level AND distance sensor. The ToughSonic CHEM 20 has built-in 0-10VDC, 4-20mA, and choice of RS-232 or RS-485 serial communications. The ToughSonic CHEM 20 also has built-in sourcing or sinking switches to control relays, alarms, motors, sirens, and more. All ToughSonic sensors are IP68 rated, and the ToughSonic CHEM 20 is built in a PVDF housing for chemical applications, with potted in and protected PUR cable and electronics. The ToughSonic CHEM 20 has 1.5 inch parallel universal bottom mounting threads and 1 inch NPT top mounting threads, and also available as Serial Only (no analog outputs or switches)



Maximum Range20 feet (6.1 meters)Optimum Range8 to 156 inches (20 cm to 4 meters)Temperature-40° to 158° F (-40° to 70° C)Humidity0 to 100% operatingProtectionNEMA-4X, NEMA 6P, IP68TransducerChemically isolated piezoelectricCompensationTemperature compensated

SenixVIEW selected optionsResolutionSerial data: 0.0034 in. (0.086 mm)

Analog steps: 4099 (0-10 VDC),

3279 (4-20 mA)RepeatabilityNominal 0.2% of range @ constant temp. Affected by target, distance, environmentUpdate Rate10 Hz (100 ms), SenixVIEW adjustable; affected by SenixVIEW filter selections

Specifications are subject to change without notice.




Voltage Output 0-10, 0-5 VDC or SenixVIEW customized Maximum output

current 10 mA

Current Loops (x 2) Two 4-20 mA current loops:

Current sourcing and current sinking

Max loop resistance 450 ohms each

SenixVIEW customized

Both share calibration parameters

Switches (x 2) Two switches, SenixVIEW customized

150 mA max @ 40 VDC max

SenixVIEW selected as sinking (NPN) or sourcing (PNP)

Adjustable setpoint, polarity, hysteresis, ON timing, OFF


Serial Data Interface Modbus & streaming protocols, 9600-115200 baud

(configurable), 8 data bits, 1 stop, no parity

RS-485 permits multi-sensor networks

Part number determines interface



Housing Injection moulded, chemically resistant Polyvinylidene fluoride (PVDF)

Also known as Kynar, a registered tradename of Arkema Inc.

Mounting Top mount: 1-inch NPT (options available)

Bottom: 1-1/2 in.straight, fits NPT or BSP

Bottom nut UA-NUT15-PV (order separately)

Cable Potted into sensor, pigtail termination

6.5 feet (2 meters), PUR jacketed

Custom lengths available

Standard models: 9-wire shielded + drain

Serial data-only models: 4-wire + drain, dual twisted shielded pair

Weight 21.2 oz. (0.60 kg)

Weight includes 6.5 ft (2 meter) cable

Attribute NameAttribute Value
Documentation from Manufacturer
Output Signal Type
Analog, Digital



Sweden, Solna, Signalistgatan 14, 16972.

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