Happyaer Hygrometer 4 Inches 4 PCS/set Thermometer Hygrometer Barometer Watches Clock Copper for Shell Marine fo

• 1.Precision temperature sensing hairspring; Precision wet hairspring; Precision gear transmission structure barometer movement; 1 second precision clock movement; Metal
• 2.Readings Comparison: The contrast pin on the lens is used to compare readings to see if atmospheric pressure rises or falls over a certain period of for time.
• 3.Wide Applicability: Generally applicable to ships, factories, laboratories, families.
• 4.Easy to Install is lightweight and easy to install, suitable for hanging or placed on a surface.
• Material: brass for shell, plastic bottom for shell, acrylic plastic lens

Features:
1.Precision temperature sensing hairspring; Precision wet hairspring; Precision gear transmission structure barometer movement; 1 second precision clock movement; Metal
2.Readings Comparison: The contrast pin on the lens is used to compare readings to see if atmospheric pressure rises or falls over a certain period of for time.
3.Wide Applicability: Generally applicable to ships, factories, laboratories, families.
4.Easy to Install is lightweight and easy to install, suitable for hanging or placed on a surface.

Parameter:
Material: brass for shell, plastic bottom for shell, acrylic plastic lens
Size(about):
thermometer: diameter: 98mm/3.86in, thickness: 33mm/1.30in;
hygrometer: diameter: 98mm/3.86in, thickness: 33mm/1.30in;
barometer: diameter: 98mm/3.86in, thickness: 36mm/1.42in;
timepiece: diameter: 98mm/3.86in, thickness: 32mm/1.26in
Dial: 0.3mm aluminum sheet printed black on white.
Measurement function parameters:
thermometer: -30 ~ 50C, accuracy: +/- 2C;
hygrometer: 0 ~ RH,
accuracy: +/- 5% RH (40 ~ 70% RH);
barometer: 950 ~ 1070hPa,
accuracy: +/-5hpa (980~1040hPa);
timepiece: travel for time error is not more than +/-1 second / day

Package List:
1 *Air pressure gauge
1*Thermometer
1*Moisture meter
1*Timepiece