The AQ-9901SD Air Quality Meter provides accurate and reliable measurements of CO2, CO, O2, humidity, dew point, and temperature, with real-time data logging capabilities, making it an essential tool for various industrial and environmental applications.

Exceptional Features of the AQ-9901SD:

1. Real-Time Data Logger: Saves measuring data along with time information (year, month, date, hour, minute, second) into the SD memory card, enabling easy download to Excel for further data analysis without extra software.

2. Multi-Function Measurement: Measures CO2 (carbon dioxide), CO (carbon monoxide), O2 (oxygen), humidity, dew point temperature, and ambient temperature, providing comprehensive air quality analysis.

3. High Accuracy and Resolution: Features high accuracy (e.g., ±40 ppm for CO2) and resolution (e.g., 0.1% for O2), ensuring precise and repeatable measurements.

4. User-Friendly Design: Equipped with a large LCD display with green backlight for easy reading, and user-friendly controls including data hold, peak hold, max/min functions, and alarm settings.

5. Advanced Connectivity: Includes RS232/USB computer interface for data output, enhancing data management and integration with other systems.

Technical Specifications:

Display:

- Type: Large dot-matrix LCD with green backlight (ON/OFF)

- Size: 52 mm x 38 mm

Measurement Functions:

CO2 (Carbon Dioxide):

- Range: 0 to 4,000 ppm

- Resolution: 1 ppm

- Accuracy: ±40 ppm (≤1,000 ppm), ±(50 ppm + 3% of reading) (1,000-3,000 ppm), reference only (>3,000 ppm)

CO (Carbon Monoxide):

- Range: 0 to 1,000 ppm

- Resolution: 1 ppm

- Accuracy: ±(5% + 2 ppm)

- Response Time: <30 seconds

- Sensitivity Drift: <5% per year

O2 (Oxygen in Air):

- Range: 0 to 30% O2

- Resolution: 0.1% O2

- Accuracy: ±(1% reading + 0.2% O2)

- Response Time: ≤15 seconds to 90% reading value

Humidity:

- Range: 10 to 95% RH

- Resolution: 0.1% RH

- Accuracy: ±(3% reading + 1% RH) (≥70% RH), ±3% RH (<70% RH)

Dew Point Temperature:

- Range: -25.3 to 48.9℃

- Resolution: 0.1℃

- Accuracy: Calculated from humidity/temperature measurement

Temperature:

- Range: 0 to 50℃, 32 to 122℉

- Resolution: 0.1℃

- Accuracy: ±0.8℃, ±1.5℉

Wet Bulb Temperature:

- Range: -21.6 to 50.0℃

- Resolution: 0.1℃

- Accuracy: Calculated from humidity/temperature measurement

Data Logger:

- Automatic: 2 to 3600 seconds

- Manual: Push the data logger button once to save data

SD Card Capacity: 1 GB to 16 GB

Power Supply:

- DC 1.5V batteries (UM3, AA) x 6 PCs or DC 9V adapter (optional)

- Power Consumption:

- Normal operation (without SD card save data and LCD backlight OFF): Approx. DC 136.5 mA

- With SD card save data and LCD backlight OFF: Approx. DC 166 mA

Operating Environment:

- Temperature: 0 to 50℃

- Humidity: Less than 80% RH

Dimensions:

- Main Instrument: 177 x 68 x 45 mm

- CO2/Humidity Probe: 197 mm length

- O2 Probe: 150 x 38 x 38 mm

- CO Probe: 150 x 38 x 38 mm

Weight: 350 g (0.77 lb)

Accessories Included:

- Instruction Manual: 1 PC

- Hard Carrying Case (CA-08): 1 PC

- CO2/Humidity Probe: 1 PC

- O2 Probe: 1 PC

- CO Probe: 1 PC

Optional Accessories:

- SD Memory Card (4 GB)

- AC to DC 9V Adapter

- USB Cable (USB-01)

- RS232 Cable (UPCB-02)

- Data Acquisition Software (SW-E816)