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Designed for the calibration of the Extech RH300, the Extech RH300-CAL Humidity Calibration Kit offers everything you need to ensure that your humidity meter remains as accurate as it was when first purchased.
Two calibration bottles are provided in the box, one which will regulate the Extech RH300 to a relative humidity of 33%, while the other offers calibration to 75%.
Using the Extech RH300-CAL Humidity Calibration Kit to adjust your humidity meter is simple – all you need to do is insert the Extech RH300’s sensor into your chosen salt bottle using the small hole provided at the top.
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