Measurement and control devices
Measurement and control devices show how the plant is performing: feed and product salinity, filter and membrane pressures, flow rates and tank levels; through the control panel they also run and protect the plant automatically. ALPHA for Environmental Technologies supplies replacement devices by measurement type and operating range.
Available on request
Tell us the model, size or quantity you need and our team will send you a technical and commercial offer.
Instruments in a plant
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Salinity meter (TDS)
Measures feed and product salinity to follow the salt rejection.
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Pressure gauges
Measure pressure before and after the filters and at the membranes, to catch clogging early.
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Flow meters
Measure product and reject flows to work out the recovery.
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pH meters
Follow the pH where chemicals are dosed.
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Level and pressure switches
Stop the pumps when the tank level or suction pressure is too low, protecting them.
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Control panel
Runs the plant and links the readings to the pumps and alarms.
Frequently asked questions about measurement and control devices
Why follow the product water salinity?
A rise is an early sign of a problem with the membranes, seals or pressure, so it can be dealt with before water quality falls.
What does a rising pressure drop across a filter mean?
Usually that the media or cartridges are clogging, so a backwash or new cartridges are needed.
Do the instruments need calibrating?
Yes. Salinity and pH meters are calibrated regularly, as the maker instructs, so their readings stay reliable.
What do I need to order a replacement device?
The measurement type and range, the supply voltage and connection type, or a photo of the current device.