SLM600 Plus Series 4-20MA Ultrasonic Level Meter


The SLM600 PLUS Series is a high quality ultrasonic level meter, which provides non-contact level measurement for a wide variety of applications involving liquids and solids. Easy calibration and maintenance free “fit and forget” performance mean that you can install the SLM600 PLUS Series quickly and with confidence. Two switched NPN open collector outputs with fully programmable setpoints are provided in the 3 wire version, together with fault condition being indicated by the 4 – 20mA output on both the 2 and 3 wire versions.

The SLM600 PLUS Series operates on the principle of timing the echo received from a measured pulse of sound transmitted in air and utilizes state of the art echo extraction technology.


  • Easy Calibration
  • 2 or 3 wire versions
  • High accuracy and resolution
  • Echo processing using unique digital echo extraction   technologies
  • Display can be user configured to show level, space or distance   from sensor
  • Option for 2 set point outputs

Technical Specifications

Dimensions Overall:
105(D) x 248.5(H) mm
55(D) x 76.5(H) mm
Accuracy 0.25% of of reading or 3mm
Mounting 2″ NPT/BSP Resolution 1mm
Weight Nominal 1.5kg Beam Angle 8o at -3dB
Case Material Polypropylene Damping Rate Adj. 0.1m/min to 10m/min
Cable Entry PG11 at rear(fitted with gland) Temperature Comp. Fully compensated
IP Rating IP65 Analogue Output 4-20mA into 600Ω
Temperature -20C to +70C Sensor Display 3 Digit LCD display
Pressure 2 bar max. Display Graphic LCD
Certification CE/CSA Pending
Supply Voltage 20 to 30VDC
Current Consumption Less than 80mA