Humidity and Temperature Probe For Extech RH520 Paperless Chart Recorders Extech RH522B

The Extech RH522B is a replacement Humidity and Temperature Probe for the RH520B Paperless Chart Recorder. It has a measurement range of -30°C to 60°C (-22°F to 140°F) and 1% RH to 99% RH. No calibration required.