MJK Expert Hydrostatic Level

Expert™ Hydrostatic Level Transmitter 700

Expert™ 700 is created especially for level measurements in water borings. Due to the build-in pressure and temperature compensation, the narrow transmitter provides stable measurements.

The diameter is just 16mm which ensures that Expert™ 700 fits in most boreholes – the measured value is delivered as 4-20mA or RS485. 

Measurement of groundwater borings demands exact evaluation of levels. Expert™ 700 has an adaptable measuring area, from 0-30 up to 0-100 meters. You will get exact measurements even in temperatures from -20 to +80◦C.

You can get your stable measurements directly in your SCADA system for many years ahead. Expert™ is produced in stainless steel which protects the sensor that holds an stunning deviation by only app. 0,5 % FS per year.

  • Stainless steel diaphragm, steel AISI 316L body
  • 2-wire 4 – 20 mA loop powered, 10-30VDC
  • Digital RS485 Modbus output
  • Surge resistance
  • Measuring ranges from 0 – 30 m or 0-100 m
  • Nominal measuring range (mWG): 0 – 30 m 0 – 100 m
  • Measuring principle: Piezo-resistive (relative pressure)
  • Min. programmable range: 10m or 30m
  • Max. programmable range: 30m or 100 m
  • Non-standard range: Min. 0 – 10 m / Max. 0 – 300 m
  • Max. overpressure: 5 bar or 20 bar
  • Temperature range: -20 °C to 50 °C
  • Temperature deviation, zero point: Better than ± 0.02 % / °C
  • Temperature deviation, full range: Better than ± 0.02 % / °C
  • Linearity / Stability: – Better than ± 0.5 % FS / ± 0.1 % FS
  • Measurement accuracy: – Better than ± 0.25 % FS @ 10 °C to 30 °C
  • Long time stability: – Better than ± 0.5 % FS per year
  • Materials: – Stainless Steel 316L (DIN 1.4435) / Viton® / PE
  • Supply voltage: 700 10 – 30 V DC (12 – 30 V DC for cable lengths above 100 m)
  • Output signal: – 2-wire 4 – 20 mA (passive transmitter) / RS485
  • Surge protection: – Supply and RS485: 200A @ 8/20 μs, Gnd/case: 2000A @ 8/20 μs
  • Cable: 5 x 0,25 mm2 , shielded, PE insulation
  • Cable length: ➀ 35 m or 110 m – Can be delivered with other cable lengths on request
  • Enclosure: IP 68, withstands a static pressure equal to max. overpressure
  • Weight (without cable): 0,2 kg
  • Approvals: CE Conformity EN61000-6-1 to -6-4