• RHM15
  • Manufacturer has 50 in stock
    This stock is typically available to ship in 3 - 5 working days.



  • Simultaneous display of Temperature and Humidity
  • Built-in memory stores max/min readings
  • Clear button resets max/min measurements
  • Measuring ranges:
    • Temperature; 14 to 140°F (-10 to 60°C)
    • Humidity; 10% to 99% RH
  • accuracy: ±5%RH, ±2°F
  • Low battery indicator
  • Complete with built-in tilt stand and LR44 battery

What's in the Box

  • RHM15 Thermometer
  • Built-in tilt stand
  • LR44 battery


The Extech RHM15 Hygro Thermometer is ideal for monitoring Temperature and Humidity conditions in enclosed or open space environments. It helps gauge proper heat and moisture levels and it also records high and low extremes during the day.

Applications for the RHM15 include:

  • Musical instrument cases
  • Humidors
  • Retail display cases
  • Memorabilia collections
  • Factories
  • Greenhouses
  • Offices
  • Homes