Dwyer AQH-20 Indoor Air Quality Meter

The Dwyer AQH-20 Indoor Air Quality Meter reduces the number of instruments a contractor has to carry by measuring the carbon dioxide concentration, air temperature, and humidity percentage in one device. A large backlit LCD display shows all three parameters simultaneously. The Model AQH-20 can display dew point or wet bulb temperatures in place of the ambient temperature. Minimum, maximum, and average readings are easily accessible through the function buttons. By pressing the hold key, the current values are held so that they can be recorded. An audible alarm warns the user that the current ambient conditions are becoming hazardous.

Features

• Ranges:
  • CO2: 0 to 2000
  • Temperature: 14 to 140°F (-10 to 60°C)
  • Relative Humidity: 0.0 to 99.9% RH
• Accuracy:
  • CO2: ±30 ppm ±5% of reading
  • Temperature: ±0.9°F (±0.6°C)
  • Humidity: ±3% RH (10 to 90%), ±5% (0.0 to 9.9% or 90 to 99.9%)
• Resolution:
  • CO2: 1 ppm
  • Temperature: 0.1°F (0.1°C)
  • Humidity: 0.1% RH
• Response Time:
• CO2: < 30 seconds
• Temperature: < 2 minutes
• Humidity: <10 minutes
• Display: 4 digits for temperature/CO2 and 3 digits for humidity
• CO2 Sensor: Non-dispersive infrared
• Uses (4) 1.5 V AA alkaline batteries, included, user replaceable.
• 30 second warm-up time