RH sensor controls humidity
General Eastern Instruments` new Microline series of relative humidity(RH)/temperature transmitters uses a bulk polymer resistive RH sensor to give highly accurate readings with minimal drift, even when the sensor is exposed to contaminants. It is intended for use in cleanrooms, HVAC/building controls, and hospitals/labs, among other applications. Microline`s standard accuracies are ± 2, 3, and 5 percent, and 1 percent accuracy is also available. The Microline is calibrated to National Institute of Standards and Technology (NIST)-traceable standards at 10 different points of relative humidity. A hand-held calibrator facilitates periodic calibration of the device. Models can be wall-mounted, duct-mounted, and outside-air mounted, and all are available with versatile temperature options: thermistor, RTD, or RTD with signal conditioning. The user can also field-select from 0 to 5 volts or 0 to 10 volts or 4 to 20 mA current signal outputs. The Microline has a pre-wired base, and the sensor and electronics are housed in the removable cover.
General Eastern Instruments, Woburn, MA