MJK Expert 7070 Hydrostatic Level

Expert™ Hydrostatic Level transmitter 7070

The MJK Expert™ 7070 Level Transmitter is an accurate 2-wire transmitter with a piezoresistive measuring system with direct air pressure and temperature compensation. 

The Expert™ 7070 has a small, external diameter of 22 mm and is made of 316L stainless steel. The transmitter is designed for measuring levels and temperature in wells and drinking water tanks.

The output signal is 4-20mA and connecting the transmitter directly to, for instance, a Mµ Connect RTU is very easy, providing the option of level logging, alarms or controlling the pumps.

Not only does Expert 7070 provide exact and stable measurement, but the construction ensures a long lifetime and low service requirements equals low running cost.

Created in AISL 316L stainless steel and equipped with optional temperature measurement, the user can keep track of both level and temperature even in boreholes.

  • Stainless steel diaphragm, steel AISI 316L body
  • 2-wire 4 – 20 mA loop powered, 10-30VDC
  • Low voltage versions digital RS485 supply voltage 3,6-30VDC
  • Very low drift (<0.5%) and high accuracy (±0.25%), year after year
  • Field re-programmable for custom ranges and zero offset calibration
  • Measuring ranges from 0 – 3 m to 0 – 300 m.
  • Nominal measuring range: 0 – 3 m 0 – 10 m 0 – 30 m 0 – 100 m
  • Measuring principle: Piezo-resistive (relative pressure) Sealed gate (SG)
  • Min. programmable range: 0 – 2 m 0 – 4 m 0 – 12 m 0 – 50 m
  • Max. programmable range: 0 – 4 m 0 – 12 m 0 – 50 m 0 – 100 m
  • Non-standard range: Min. 0 – 2 m / Max. 0 – 300 m
  • Max. overpressure: 3 bar 3 bar 11 bar 20 bar
  • Temperature range: -10° C to 65° C
  • Temp. deviation, zero point: Better than ± 0.02 % / °C
  • Temp. 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 to 30° C, Better than ± 0.5 % FS @ full temperature range
  • Long time stability: Better than ± 0.5 % FS per year
  • Materials: Housing and diaphragm: Stainless steel (1.4404 / AISI 316 L)
  • Supply voltage: 7070 10 – 30 VDC (12 – 30 VDC for cable lengths above 100 m)
  • Output signal: 7070 2-wire 4 – 20 mA (passive transmitter)
  • Cable: 2 × 0,5 mm2 (pressure) + 5 x 0,15 mm2 (data), shielded, PUR insulation
  • Cable length: 12 m 12 m 35 m 110 m
  • Enclosure: IP 68, withstands a static pressure equal to max. overpressure
  • Approvals CE directive: 89/336/EEC, 2004/108/EC, 1999/EC, EN 61326-1, 61326-2-3, EN 55011, 61000-4-2, 61000-4-3, 61000-4-4, 61000-4-5,61000-