Casella Instruments Humidity Slide Rule Hygrograph Charts requires no maintenance apart from

requires no maintenance apart from routine cleaning

When connected to the Merlin wind indicator

and those looking to build on a basic understanding of weather monitoring

choose the MET-1603

Create the Weathermaster home weather station with this 6-instrument mounting panel and arranging Maximum's Maestro

Casella Instruments Humidity Slide Rule Hygrograph Charts requires no maintenance apart fromDescription Features Specification Simple humidity conversion table via a slide rule. Ideal for use with either a whirling hygrometer or instrument screen with masons hygrometer. After taking your dry bulb temperature, simply set the rule, and, at the wet bulb temperature, read off the percentage relative humidity figure. Suitable for use with whirling or masons hygrometer Measurements in C or F Temperature Range 15C to +60C