17th November 2011 - Instrumentation specialist Impress Sensors & Systems Ltd has launched two new marine-approved sensors for level and pressure measurement of storage and ballast tanks. Both sensors are approved by DNV and Germanischer Lloyd.
The new LMK 458 is a hydrostatic probe with ceramic (Al2O3) diaphragm that is suitable for level measurement in marine storage/ballast tanks and draught monitoring, as well as applications in the water industry such as desalinization plants and drinking water filtration.
The probe uses a capacitive ceramic sensor element that provides a high resistance to overpressures. The transmitter is protected to IP68 and provides good resistance to chemicals and high long-term stability.
An optional intrinsically safe (IS) version of the LMK 458 is also available. This version is ideal for measuring the pressure of various fluids in harsh marine environments, including Zone 0 ATEX areas. Other options include different housing materials, either stainless steel as standard or a Cupro-Nickel (CuNiFe) sea water-resistant version. Other options include screw-in or flange-mounted versions, as well as other accessories such as probe flanges and mounting clamps.
The LMK 458 has a diameter of just 39.5mm and is able to operate in temperatures from -25 deg C to +125 deg C. The sensor is accurate to 0.25% FSO (to IEC 60770). Nominal pressure ranges are from 0-40 cmH2O, up to 0-200 mH20.
In addition to the LMK 458, Impress Sensors has also launched a marine-approved pressure transmitter. The DMK 458 is a pressure transmitter with ceramic diaphragm that is suitable for monitoring pressures in a variety of marine and offshore applications, including loading and unloading systems, level measurement in ballast and storage tanks, draught monitoring, and anti-heeling systems used on ferries and cargo ships, which prevent heeling of the ship during loading and unloading.
The DMK 458 offers high overload pressures, excellent accuracy and high temperature resistance. The transmitter is available in nominal pressure ranges from 0-40mbar up to 0-20bar. As well as threaded versions, the transmitter is also available in various flush mounted versions, which are ideal for measuring pressures of viscous, pasty and polluted media.
The DMK 458 can operate in temperatures from -40 deg C up to +125 deg C. The sensor is accurate to 0.25% FSO to IEC 60770. An optional IS-version for Zone 0 applications is also available.