GE Protimeter Hygromaster Hygrometer

Moisture Meters


New GE Protimeter Hygromaster Hygrometer

Protimeter Hygromaster Hygrometer measures RH, ambient temperature & dewpoint


Features & Applications:

Obtain quick measurements of relative humidity, dew point, mixing ratio (grains per pound/parts per million by weight) and ambient temperature. All shown on a split display at the touch of a button. Includes two AA batteries.


It is a versatile tool ideally suited for professionals involved in the following industries:

  • HVAC
  • Building survey/home inspection
  • Dampness diagnosis in buildings
  • Flooring installation
  • Specialty coating applications
  • Flood restoration



  • Relative humidity
  • Air temperature
  • Dew point temperature
  • Mixing ratio/absolute humidity/grains per pound
  • Surface temperature
  • Surface proximity to dew point

Relative humidity and air temperature values are displayed simultaneously when switching the Hygromaster on. Dew point and mixing ratio/absolute humidity are displayed at the touch of a button.



  • Concrete floor moisture measurement
  • Indoor air quality
  • Environmental health
  • HVAC
  • Flood restoration


Spec Summary:

Surface Temperature Probe Range: 32°F to 122°F (0°C to 50°C)
Hygrostick Data (Nominal):
  • 30% to 40% RH (±3% RH)
  • 41% to 90% RH (±2% RH)
  • 32°F to 122°F (0°C to 50°C) ±0.6°F (±0.3°C)
  • Dimensions: Ø 0.3 in x 2 in (8 mm x 50 mm)
Humistick Data (Nominal):
  • 0%to 10% RH, ±3% RH at 68°F to 86°F (20°C to 30°C),
    10% to 90% RH, ±2% RH at 68°F to 86°F (20°C to 30°C),
    90% to 100% RH, ±3% RH at 68°F to 86°F (20°C to 30°C),
    32°F to 122°F (0°C to 50°C) ±0.6°F (±0.3°C)
  • Dimensions: Ø 0.6 in x 2.5 in (16 mm x 65 mm)
Batteries: (2) AA
Weight 4 oz. (100g)