Pressure transmitter targets pump and compressor applications

Specified over the -40 to 125°C temperature range, the new 17.609G device has a stainless steel housing, pressure port and diaphragm, and is said to require no O-ring seals. "Refrigeration plants use gas, liquid and mechanical energy to move heat from one place to another," commented Impress' Sam Drury. "Compressors and pumps are required to repressurise the gas, and discharge the liquid through cold water heat exchangers or cooling fans. The refrigeration media, normally R134a in Europe, is mixed with an oil or lubricant, of which there are many different types. This is to ensure that the refrigerant can be transported easily through the pipework." Drury continued: "However, when it comes to selecting a pressure transmitter for the pumps or compressors within these systems, it is very difficult to achieve compatibility between the refrigeration media and the O-ring seals on the pressure transmitter. The 17.609G is ideal for these types of applications, as it operates oil free and is welded so it requires no O-rings." The pressure transmitter is available in compound nominal pressure ranges from 0 to 6bar up to 0 to 60bar and from –1 to 6bar up to –1 to 60bar. This means the sensors can measure pressures in a vacuum, as well as being resistant to vacuum conditions. The sensors are also said to offer up to three times overpressure or higher.