New slimline plastic level sensors for waste water and other aggressive media
Published: 12 November 2014 - Marianne Evans
A range of slimline (21mm diameter) submersible plastic level sensors for continuous level measurement in confined spaces and small-size boreholes is now available from instrumentation specialist Impress Sensors & Systems.
With a diameter of 21mm, the LMK 806 series of PVC-housed submersible ceramic level sensors is specially 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” pipe or tube. Typical applications include wastewater treatment plants, chemical dosing stations, sewage lift stations, water recycling plants, storage tanks and landfill sites.
LMK 806 level sensors benefit from a PVC housing that provides maximum media compatibility and protection from virtually any aggressive media, including most acids and strong alkalis. Different cable materials (e.g. PVC, PUR, FEP) and seals are available to suit a range of different media. The sensing technology on the LMK 806 series is a flush-mounted ceramic sensing element, which provides high reliability in long-term installations. 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, thus preventing clogging.
Sam Drury, sales and marketing director at Impress Sensors & Systems commented: “It’s unusual to find a plastic level sensor with such a small diameter [21mm]. Most plastic level sensors are much bulkier. The LMK 806 level sensor should therefore appeal to a wide range of customers who require a submersible plastic level sensor for use in confined spaces in pipes, tubes and small size boreholes.” 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.