AQH-20

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The Dwyer AQH-20 is a portable 5-in-1 IAQ meter measuring CO2, temperature, humidity, dew point, and wet bulb. Features NDIR sensor, backlit LCD, and audible alarm.

DWYER AQH-20 HANDHELD INDOOR AIR QUALITY METER | 5-in-1 CO2 & TEMP MONITOR

The Dwyer AQH-20  is a portable, 5-in-1 handheld Indoor Air Quality (IAQ) meter that measures carbon dioxide (CO₂) concentration, air temperature, and relative humidity in a single device.

  • All-in-one unit for carbon dioxide, temperature, and humidity
  • Large backlit LCD for visibility in dark areas
  • User configurable alarms for audible indication of hazardous conditions

DWYER AQH-20 HANDHELD INDOOR AIR QUALITY METER | 5-in-1 CO2 & TEMP MONITOR

The Model AQH-20 is designed to streamline air quality surveys by reducing the number of instruments a contractor must carry. It features a large backlit LCD that simultaneously displays CO₂, temperature, and humidity. Utilizing high-accuracy Non-Dispersive Infrared (NDIR) technology for gas sensing, the unit can also calculate and display wet bulb and dew point temperatures. Users can access minimum, maximum, and average readings via dedicated function buttons, while a hold key freezes current values for documentation. For safety, it includes a user-configurable audible alarm to alert operators when ambient conditions become hazardous.

PRODUCT USES:

  • Building Commissioning: Verifying indoor air quality standards in new or renovated offices and buildings.
  • HVAC Performance Surveys: Diagnosing ventilation effectiveness by monitoring CO₂ buildup.
  • Agricultural Monitoring: Ideal for specialized environments like mushroom farming or greenhouses.
  • Healthcare Facilities: Ensuring safe ambient air conditions in hospitals.
  • Food Industry: Monitoring storage and processing areas for air quality compliance.

Technical Sheets

Instruction Manual

Catalog Page

Specifications

DWYER AQH-20 HANDHELD INDOOR AIR QUALITY METER | 5-in-1 CO2 & TEMP MONITOR – KEY SPECIFICATIONS

  • Parameters Measured: CO₂ concentration, Air Temperature, Humidity, Dew Point, and Wet Bulb.
  • CO₂ Range: 0 to 2000 ppm.
  • Temperature Range: 14 to 140°F (-10 to 60°C).
  • Relative Humidity Range: 0.0 to 99.9% RH.
  • Accuracy: ±30 ppm ±5% of reading (CO₂); ±0.9°F (Temp); ±3% RH (Humidity 10-90%).
  • Sensor Type: Non-dispersive infrared (NDIR) for CO₂.
  • Warm-up Time: 30 seconds.
  • Power Supply: (4) 1.5V AA alkaline batteries (included and user-replaceable).
  • Display: 4-digit backlit LCD for Temp/CO₂ and 3-digit for Humidity.
  • Weight: 6.76 oz (200 g).

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