A/34-D-4"-4X - The A/34 sensor provides a -400 to 2300 mV output throughout the temperature range of -40 to 230ºF. The polycarbonate NEMA 4X (4X) configuration is designed for wet environments and adds a level of corrosion resistance. ACI duct temperature sensors are designed for HVAC Building Automation and light industrial systems. Specific applications include: zone control air handling unit and temperature monitoring. Double encapsulated sensor Built in mounting flange NEMA 4X enclosure