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Liquids or Solids in Chemically Aggressive Environments
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Chem series sensors and SenixVIEW software put the power of ultrasonics in your hands. You can quickly adjust, optimize, save, and clone your applications quickly without calibration!

The CHEM 12 is housed in a rugged, chemically inert PVDF sealed housing for long life. A new shorter design and smaller diameter transducer allows for easier installation in tight locations, and measurements closer to the top of a tank. The CHEM 12 also has an improved rugged strain relief design.

Applications include pump control, bulk inventory, batch processing, water management and high/low-level alarms.


  • More compact design
  • Smaller diameter transducer – easier installation when space is limited
  • Shorter design – Measure closer to the top of a tank
  • Robust Strain Relief 
  • 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


  • Chemical tank levels
  • Benign liquid tank levels
  • Tanks up to 12-ft (3.66 m) tall
  • 1.5 in NPT bottom thread, 1.0 in. NPT top thread



Maximum Range 12 feet (3.66 meters)
Optimum Range 4 in. to 10 ft (100 mm to 3 meters)
Temperature -40° to 158° F (-40° to 70° C)
Humidity 0 to 100% operating
Protection NEMA-4X, NEMA 6P, IP68
Transducer Chemically isolated piezoelectric
Compensation Temperature-compensated SenixVIEW selected options
Resolution Serial data: 0.0034 in. (0.086 mm) Analog steps: 4099 (0-10 VDC), 3279 (4-20 mA)
Repeatability Nominal 0.2% of range @ constant temp. Affected by target, distance, environment
Update Rate 20 Hz (50 ms), SenixVIEW adjustable; affected by SenixVIEW filter selections



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
(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 timing
Serial Data Interface Modbus & streaming protocols
9600-115200 baud (configurable)
8 data bits, 1 stop, no parity
RS-485 permits multi-sensor networks
The part number determines the 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
Bottom: 1-1/2 in. NPT
Cable Potted into the 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

Specifications are subject to change without notice.