LMK809 – Hydrostatic Level Gauge

The LMK809 plastic submersible probe is designed for continuous measurement of the level of wastewater and corrosive media. The core component of this probe is a capacitive ceramic sensor.

Ranges from 0 ... 0.4 mH₂O to 0 ... 100 mH₂O
Accuracy: 0.35% / 0.25% FSO
Diameter: 45 mm
Chemical resistance
Overload resistance
Specifically designed for measurements in tanks containing dense and aggressive media
Diaphragm made of 99.9% AI₂O₃
Housing material: PP-HT or PVDF

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Description

The LMK809 plastic submersible level sensor is primarily designed for measuring the level of heavily contaminated wastewater and various aggressive media. However, it can also be used to monitor surface and groundwater levels, where its high resistance to contamination and sludge buildup on the measuring membrane is particularly advantageous.
Instead of the usual stainless steel membrane, the level sensor features a special hydrostatic pressure sensor made of durable corundum ceramic.
The level meter connects to a data logger or control unit via a 4–20 mA analog current output. The level sensor is also powered by the connected device.
LMK809 level sensors are available in a wide range of measurement ranges. The most sensitive sensors measure levels ranging from 0 to 40 cm, while the highest range is capable of measuring up to 100 m of water column.

Applications

Wastewater (wastewater treatment plants, water treatment facilities, landfills)
Corrosive media (level measurement of acids and alkalis)

Technical specifications

Technical Specifications	LMK809 Hydrostatic Level Gauge
Pressure Ranges	from 0 ... 0.4 mH₂O to 0 ... 100 mH₂O
Output Signals	2-wire: 4 ... 20 mA, 3-wire: 0 ... 10 V, others upon request
Housing	PP-HT / PVDF
Power consumption	max. 21 mA
Weight	approx. 320 g (without cable)
Protection rating	IP68

Downloads

Price List Cenik 2026 V101

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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.