Display can be mounted outside the incubator, while the sensor is inside getting a accurate reading.

Digital Hygrometer Humidity Meter and Thermometer Sensor for Incubator Egg

Features:    Dual Readouts in one easy to use unit.    Convenient size and quality construction    Suitable for panel mounting    Can be stood up on flat services.    Dependable reading with high accuracy    Remote sensor with 1.5m of cable    Display can be mounted outside the incubator, while the sensor is inside getting a accurate reading.Size : 4.8cm x 2.8cm x 1.5cm ThickRequires two LR44 batteries (supplied)Long LifeI will test all hygrometers prior to dispatch.

Digital Hygrometer Humidity Meter and Thermometer Sensor for Incubator Egg