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Dwyer Model AQH-20
Handheld Indoor Air Quality Meter
Measures CO2, Temperature and Humidity
Dwyer Model AQH-20
The Model 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. The Model AQH-20 includes a hard carrying case and four AA alkaline batteries.

AQH-20 SPECIFICATIONS
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.
Temperature Limits: 32 to 122°F (0 to 50°C).
Humidity Limits (Non-Condensing): 0 to 95% RH.
Power Requirements: Four AA alkaline batteries.
Warm Up Time: 30 seconds.
Weight: 6.76 oz (200 g).
Agency Approvals: CE.
Ordering Details:
Model Number Description Lead Time
AQH-20 Handheld indoor air quality meter. Stock
Accessory TH-CAL 33% and 75% RH calibration standard. Stock