Endress+Hauser introduces the Deltabar FMD71 level transmitter, which uses two pressure sensor modules, each connected electronically to a single transmitter. Using a Ceraphire ceramic sensor in the pressure sensor modules, the transmitter calculates the differential pressure from both sensors and transmits the level, volume or mass via 4-20 mA with HART as a standard two wire loop powered device.
One sensor module measures the hydrostatic pressure and the other the head pressure. Each sensor sends a digital signal corresponding to temperature compensated measured pressure to the transmitter. This electronic system eliminates issues of traditional differential pressure measurements by doing away with impulse lines or capillaries and their related issues of icing, clogging, leaks, condensation and changing ambient temperatures.
The sensors connect to the transmitter module via industry standards, colour coded twisted pair cable and have NEMA 4X/6P watertight housings and connections. The transmitter can be located away from the sensors in areas safe and convenient for personnel. The system meets ATEX, IEC Ex, CSA and FM specifications for use in hazardous areas including Zones 0, 1 and 2; and Division 1 and 2.
The Ceraphine ceramic cell is vacuum, corrosion and abrasion resistant, eliminating traditional mechanical issues with corrosive and abrasive media. The Ceraphine ceramic cell can be used in absolute vacuum and has excellent chemical resistance properties, similar to Alloy C.
Adapted from press release by Claira Lloyd
Read the article online at: https://www.hydrocarbonengineering.com/product-news/29052014/endress_hauser_new_transmitter/