Finally, a portable Dewpoint hygrometer that integrates the accuracy and reliability of the Edgetech Instruments chilled mirror, with the convenience and ruggedness required for field use. Model PDM75-X3 delivers the Edgetech Instruments Advantage: an ideal system tailored to your application needs. A modular chilled mirror sensor configured to meet your dewpoint requirements and the chemical resistivity of background gases. Choose the customized sampling system designed to match your process requirements. Select the best user interface options to meet your needs. PDM75-X3 offers Primary Standard Measurement Technique that is NIST Traceable. PDM75-X3 is available with RS-232 Serial Interface, two User Configurable Relay Alarms, and Analog Voltage or 4-20mA outputs. PDM75-X3 can be configured for positive pressure sample gas or designed to extract a gas sample using an integrated vacuum pump. It comes standard with a quick-disconnect, adjustable sample flowmeter.