Kavlico, a business unit of Custom Sensors & Technologies (CST) headquartered in California, US, has developed a new version of the PT250 pressure transmitter designed specifically for installation in heat pump systems. Incorporating a piezo-resistive sense element, these rugged, all-welded, 304L stainless steel constructed devices have an integral pipe pressure connection that is welded at the pressure source. The PT250 from Kavlico does not utilize a gasket, and thereby complies with the EU 842/2006 directive. It is compatible with the following heat pump systems: air to air; air to water; water to water; water to air; ground to water; and ground to air. Pressure ranges for the PT250 are available from 0-6 through 0-400bar. Operating on a supply voltage of 9 to 32Vdc, the transmitters provide a 4-20mA linear analog output that is proportional to pressure. The operating temperature range is -15 to +85C, while storage temperature is -40 to +125C. The fast response devices are RFI/EMI and reverse polarity protected. The stainless steel isolation diaphragm is compatible with most industrial fluids and gaseous media.