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Slimline plastic level sensors for aggressive media

16 September 2014

A range of slimline submersible plastic level sensors for continuous level measurement in confined spaces and small-size boreholes is available from Impress Sensors & Systems.

With a diameter of 21mm, the LMK 806 series of PVC-housed submersible ceramic level sensors has been designed for hydrostatic level measurement of wastewater and other aggressive media, particularly where the sensor needs to be mounted inside a confined space such as an existing small size borehole, ¾ in pipe or tube. Typical applications are said to include wastewater treatment plants, chemical dosing stations, sewage lift stations, water recycling plants, storage tanks and landfill sites.

The level sensors include a PVC housing that provides maximum media compatibility and protection from virtually any aggressive media, including most acids and strong alkalis. Different cable materials  and seals are available to suit a range of different media.

The sensing technology is a flush-mounted ceramic sensing element. Reliability is further enhanced by a nose cone, which when removed, exposes the flush diaphragm. This allows the sensor to be easily cleaned and any solid media removed, helping to  prevent clogging.

Nominal pressure ranges are from 0…6mWG up to 0…200mWG. Accuracy is +/-0.5% FSO to IEC 60770 and so includes all setting errors, making this a high accuracy level-measuring instrument. 

The sensor provides excellent linearity, long-term stability and a high level of electrical protection (emission and immunity according to EN 61326) to prevent damage once the unit is installed in the field. Output signal is 2-wire, 4…20mA.


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