MULAIDI 4pcs Thermometer Hygrometer Barometer Watch Clock Copper For Shell Weather Stati Thermometer Hygrometer Greenhouse

Readings Comparison: The contrast pin on the lens is used to compare readings to see if atmospheric pressure rises falls over a certain period of time. temperature sensing hairspring; wet hairspring; gear transmission structure barometer movement; 1 second clock movement; Metal Thermometer: -30 ~ 50℃, accuracy: +/- 2℃ Hygrometer: 0 ~ RH Accuracy: +/- 5% RH (40 ~ 70% RH) Barometer: 950 ~ 1070hPa Accuracy: +/-5hpa (980~1040hPa) Material: Brass Shell, Plastic Bottom Shell, Acrylic Plastic Lens Quantity: 4pcs/set Wide Applicability: Generally applicable to ships, factories, laboratories, families. Easy to Install is lightweight and easy to install, suitable for hanging placed on a surface.