The HI8666 is a solid-state, wall-mounted transmitter for on-site, continuous monitoring of relative humidity and temperature in critical or controlled environments. It is equipped with a removable sintered cap, has excellent accuracy, and can communicate signals to remote panel meters, controllers, or data acquisition systems.
Features at a Glance
Built-in Sensor - The HI8666 contains a built-in thin-film polymer capacitive (TFPC) sensor that accurately measures relative humidity and temperature.
Analog Output Communication - Each 4-20 mA analog signal can be sent to remote panel meters, controllers or data acquisition systems. The signals are to be powered by separate external voltage sources.
Sintered Cap Protection - With the sintered cap installed, the sensor is protected from dust and debris prolonging the life of the sensor and the instrument with less maintenance required.
RH Range 0% (4 mA) to 100% (20 mA) RH Accuracy ±2% (5% to 95% RH) Temperature Range -20°C (4 mA) to 60°C (20 mA) Temperature Accuracy (@25ºC/77ºF) ±1% FS Response Time 6 seconds without sintered cap; 60 seconds with sintered cap Power Supply 10-30 Vdc Output Signal 4 to 20 mA Environment 0 to 60°C (32 to 140°F) Dimensions 79 x 49 x 150 mm (3.1 x 1.9 x 5.9”) Weight 150 g (5.3 oz.) Ordering Information HI8666 is supplied with built-in RH sensor, protective sintered cap for RH sensor, mounting brackets and instructions. Warranty 2 years Notes Panel Cutout: 73 x 42 mm (2.9 x 1.6")