LMK858 – Hydrostatic Level Gauge

The LMK858 plastic submersible probe is primarily designed for measuring the level of corrosive media. The probe can be used in dense media, such as sludge or other dense substances.

Ranges from 0 ... 40 cm H₂O to 0 ... 100 m H₂O
Accuracy 0.25% / 0.35% FSO
Diameter: 45 mm
Detachable cable assembly
Chemical resistance
PP-HT housing material
Connects to all FIEDLER stations via the level transmitter’s 4–20 mA analog output

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Description

The LMK858 plastic submersible level sensor was developed to measure the level of heavily contaminated wastewater, river levels, and various corrosive media. Instead of the usual stainless steel diaphragm, the level meter features a special hydrostatic pressure sensor made of durable corundum ceramic.
The detachable cable assembly, separate from the level meter body, facilitates the replacement of a damaged or otherwise malfunctioning sensor.
The level meter connects to a Q2, H3, H7, STELA, or H1 station (telemetry unit) via a 4–20 mA analog current output. The level meter is also powered by the connected device.

Applications

Wastewater (measuring low levels in wastewater treatment and purification tanks, monitoring groundwater levels)
Corrosive media (monitoring the levels of various types of acids and alkalis)

Technical specifications

Technical Specifications	LMK858 Hydrostatic Level Gauge
Pressure Ranges	0 ... 40 cmH₂O to 0 ... 100 mH₂O
Output Signals	2-wire: 4 ... 20 mA, 3-wire: 0 ... 10 V, others upon request
Housing	PP-HT
Cable Protection	No protection / Prepared for mounting in a rigid PVC pipe with a diameter of 25 mm
Power Consumption	Max. 25 mA
Weight	approx. 400 g (without cable)
Protection Rating	IP68

Downloads

Price List Cenik 2026 V101 Datasheet H1 Datasheet Kdo Prutokomer

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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.