FIEDLER > Level measurement > Hydrostatic level meters > Hydrostatic level meters 4-20 mA output > LMP307, LMP307i – Hydrostatic Level Gauges
Hydrostatic level meters 4-20 mA output

LMP307, LMP307i – Hydrostatic Level Gauges

The submersible pressure level sensor is used for continuous level measurement. The sensor connects to telemetry stations either via 4–20 mA analog inputs (LMP307) or via an RS485 digital interface (LMP307i). A wide range of variants is available, enabling measurement in both clean water and heavily contaminated liquids. Measurement ranges are available from 0–0.6 m to 0–100 m of water column. When ordering, you must specify the required accuracy of the level meter (from 0.1 to 0.5% of the range), the housing design and diaphragm material, the length and material of the supply cable (PUR, PVC), and, last but not least, the current output type (1–5 mA, 4–20 mA, 0–20 mA, etc.). LMP307i level transmitters with an RS485 digital output are also available for order.

  • Low temperature-induced error, excellent accuracy, and long-term stability
  • Measurement of the level of liquids, slurries, suspensions, and emulsions
  • Level measurement ranges from 0.6 to 100 m
  • Level measurement accuracy of 0.1–0.5%, depending on the model
  • Easy cleaning of the separating diaphragm
  • Compensation for atmospheric pressure
  • Level transmitter current output: 4–20 mA, 0–20 mA, 1–5 mA

Description

Level sensors can be connected to all telemetry and data-logging units in our product line (STELA, H1, H3, H7, Q2, H40). Some units can accommodate more than one sensor (H1, H3, H7, Q2).
The H3 and H1 units can also continuously calculate the current flow rate from the measured level based on a “level-flow” table or an equation for the specific flow profile used (consumption equation).

Applications

  • Level measurement of liquids, sludge, suspensions, and emulsions
  • Level measurement in open tanks
  • Underground level measurement
  • Depth measurement in wells and open bodies of water
  • Water supply, wastewater treatment plants

Technical specifications

Technical Specifications LMP307 LMP307i
Ranges from 0 ... 1 mH₂O to 0 ... 250 mH₂O from 0 ... 4 mH₂O to 0 ... 200 mH₂O
Output Signals 2-wire: 4 ... 20 mA, 3-wire: 0 ... 20 mA / 0 ... 10 V, others upon request 2-wire: 4 ... 20 mA, 3-wire: 0 ... 10 V, others upon request
Probe diameter 27 mm 27 mm
Housing material 1.4404 stainless steel (316L) 1.4404 stainless steel (316L)
Weight approx. 200 g (without cable) approx. 200 g (without cable)
Protective cap POM-C POM
Protection rating IP68 IP68

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LMP307, LMP307i – Hydrostatic Level Gauges



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