MJK Expert Hydrostatic Level

Expert™ Hydrostatic Level transmitter 700D

Expert 700D is created especially for level measurement in water borings. This digital version of Expert 700 is especially recommendable when working with Chatter datalogger.

The diameter is just 16mm which ensures that Expert 700D fits in most boreholes – the measured value is delivered as ModBus RS485.

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

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/D 10 – 30 V DC (12 – 30 V DC for cable lengths above 100 m)
  • Output signal: 700D RS485 Modbus level- and temperature transmitter signal.
  • 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