Dwyer A-449 Remote LCD Calibration Display

Lets you field-calibrate indoor air quality and gas transmitters without integral displays. The mini USB connection plugs into the electronics board for span and zero adjustment. It can also indicate when a transmitter's internal sensor needs to be replaced.

Compatible with Dwyer RHP series humidity/temperature/dewpoint transmitters, GSTA/GSTC carbon monoxide/nitrogen dioxide gas transmitters, CDT series carbon dioxide/temperature/VOC transmitters.