The Sensor Holder/ Sample Cell is recommended for all Dewpoint Transmitter installations to achieve optimum sampling conditions and enables convenient removal of the Transmitter for annual calibration. The sample gas is passed through the 316 stainless steel unit using high-quality stainless steel compression fittings. Sensor Holders are supplied with a mounting plate, and 1/8” NPT ports as standard; 1/4”, 1/8” or 6mm inlet and outlet fittings are available to suit your application.