The combination of readings from this hygrometer with Durotherm element and bi-metallic thermometer
The combination of
readings from this hygrometer with Durotherm element and bi-metallic
thermometer indicates dewpoint, saturation humidity and night frost and
comes with brass case and 4" silver dial. Humidity range: 20 to
100% RH. Temperature range: 20¡Æ to 100¡ÆF.