4 Inches 4 PCS/set Thermometer Hygrometer Barometer Watches Clock Copper For She Hygrometer Round

4 Pcs Boat Barometer Clock Thermometer Hygrometer Set Wall Mounting Type Brass For Case For Shell LightwFeatures:1.Precision temperature sensing hairspring; wet hairspring; gear transmission structure barometer movement; 1 second clock movement; Metal 2.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 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 placed on a surface Parameter: brass for shell, bottom for shell, acrylic lensSize(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 /

• [1] power supply: This product requires access 4-28V power supply, the for positive power supply, the black wire to the negative power. feature of this product: its own reverse anti-burning circuit, avoiding the user process due to improper problems. Friendly reminder: must not be connected with 220V <br/>2 Display Description: When the temperature sensor is removed when the digital display the temperature is below -20 ℃
• Product Usage:<br/>(1) Measuring the temperature inside and outside the car<br/>(2) Measuring the temperature inside and outside the air-conditioned room<br/>(3) Measuring the temperature inside and outside the refrigerator
• (4) Temperature measurement pond<br/>(5) Baby bath water temperature measuremen
• Supply voltage: 4-28V <br/>rate: about 1S / times<br/>Accuracy: 1 ℃<br/>Measuring temperature: -20 ℃ ~ 100 ℃<br/>Working temperature: -40 ℃ to 80 ℃<br/>Display color: + Green
• thermometer: -30 ~ 50C, accuracy: +/- 2C;<br/>hygrometer: 0 ~ RH,<br/>accuracy: +/- 5% RH (40 ~ 70% RH);<br/>barometer: 950 ~ 1070hPa,<br/>accuracy: +/-5hpa (980~1040hPa);<br/>timepiece: travel time error is not more than +/-1 second / day