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