4-inch Dial Retro Brass Case Thermometer Hygrometer 0°F - 120°F Indoor Outdoor Wall Mounted Humidity Meter

Mounting Type Thermometer and Hygrometer without batteries<br> Fahrenheit and Celsius temperature scale<br> Fine and clear dial, easy to read scale.<br> Hooking hole available with adjustable port.<br> High quality transparent exquisite dial.<br> Application: suitable for greenhouse, warehouse, office, cabinet, garden, courtyard, home, etc.<br> Tips For Calibrating Analog Hygrometers<br> Wet Cloth Method<br> You may calibrate your hygrometer using the wet cloth method.<br> For this method, you’ll take a damp towel and wrap it around your hygrometer then let it seat for about an hour.<br> After, unwrap your hygrometer and it should read 95%-98%.<br> If this isn’t the case, adjust it with a screw driver until it reads 95%-98%. Calibrating a hygrometer doesn’t require any technical skills,<br> anyone can do it. Always ensure that you re-calibrate your hygrometer.<br> This is because new hygrometers haven’t yet been exposed to humidity and thus their readings may not be accurate.<br> Also, ensure that you calibrate your humidor at least once every year. <br>

• Material: Brass Dimensions: Face dial 10cm / 4-inch diameter
  2 cm / one inche thickness 
  Weight: 0.22 pound
• Temperature measuring range: 0° C to 50° C 
  Humidity measuring range: 0% --100%RH 
  
  
• Temperature measuring accuracy: < ±1° C(10 to 30° C), <= ±2° C(other) 
  Humidity measuring accuracy: <= ±5%RH (40% to 75%), <= ±7%RH (25% to 40%), <= ±9RH (other)
• Package included: 1x Thermometer and Hygrometer