The Lee-Dickens range of Relative Humidity and Temperature probes, meters and transmitters can all be fitted with Calibration Capsules. The CAL CAPS will screw on in place of the sensor guard whether it be a polypropylene cage or a sintered bronze guard. The CAL CAPS contain saturated salts and simulate conditions of 0% and 75% RH. By applying these to a probe the RH output/indication can be checked in the field and if necessary adjusted. The capsules will, with careful usage, give up to 100 calibration checks. They also have a shelf life of approximately one year and can therefore be stocked for use when required.
