A new range of water-approved submersible level transmitters is now available from Impress Sensors & Systems. The new IWSL range of WRAS-approved submersible level transmitters is suitable for continuous submersion in water, for a wide range of level measurement applications in reservoirs and drinking water storage tanks, but also for use in rivers, boreholes, aquifers, environmental monitoring and V-notch weir flow measurements. The sensors use a piezoresistive media-isolated, silicon sensing technology and a stainless steel diaphragm, which provide excellent stability, repeatability and resolution. The sensor housing is 316L stainless steel, making it ideal for reliable, repeatable hydrostatic level measurement. The sensors are available in nominal pressure ranges from 1mWG to 100mWG. When installing a product that will carry, receive or be submersed in water from the public mains water supply in the UK, it is a criminal offence if that device does not comply with the Water Supply Regulations or Scottish Byelaws. The Water Regulations Advisory Scheme (WRAS) requires that these devices should not cause waste, misuse, undue consumption or contamination of the water supply and must be of an appropriate quality and standard.