Are you looking for a professional, yet hygroscope? these are hygroscopes, made of ABS material. Humidity display resolution is up to 1%, it can clearly display temperature and humidity. They are one of the for you. Features - Material: ABS. - Size: About 4.50X2.50X1.50cm/1.77X0.98X0.59inch. - Temperature test accuracy: ±1.0 degree centigrade. - Temperature sampling period: 10 seconds. - Relative humidity test range: 20%-90%. - Humidity display resolution: 1%. - Humidity test accuracy: ±5% (under room temperature 25 degree centigrade). - Temperature: -50-60 degree centigrade. (When the measuring temperature is lower than -50 degree centigrade, degree centigrade is displayed. When the measured temperature is higher than 60 degree centigrade, it will display degree centigrade). - Made of ABS material, you can use them for a long time. - Large-character display, clear to read. - Low power consumption and high stability and accuracy. - It can clearly display temperature and humidity. - Their surface is smooth, you will have the good skin feeling. Package list: 5 x Hygrothermograph