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. This model is often inset in a specially made hole, or mounted with Velcro that is provided.
Front Diameter- 1-11/16"; Back Diameter- 1-9/16"
