HMK15 Humidity Calibrator is a Vaisala-specific calibration instrument for calibrating Vaisala humidity measuring devices. It uses the principle of the saturated salt method by inserting the sensor probe into the calibration bottle to match the probe's reading to the relative humidity of the saturated salt solution, thereby achieving calibration of the measuring device.
The HMK15 humidity calibrator is designed for calibrating and adjusting humidity measurement instruments using the saturated‑salt method. It can be used in a laboratory or field setting, and includes a sealed calibration bottle and optional carrying bag for portable use.
The manual explains how to prepare saturated‑salt solutions, insert the sensor head into the calibration bottle, and adjust the instrument to the known humidity values. It also lists optional accessories such as spare bottles, ion‑exchange water, and a carrying bag (order code HM27032). This manual is written in Japanese.