This is our medium dial analog hygrometer ideal for any humidor, check below for measurements if you need a replacement. It reads relative humidity (RH) . Technical adjustments can be made at the rear of the hygrometer for easy calibrating. Real glass lens. Dimensions: diameter front:1.11/16" rear: 1 9/16". This model is often inset in a specially made hole, or mounted with Velcro that is provided.
