UNI-T A37 Carbon Dioxide Monitor
The UNI-T A37 is a compact NDIR-based Carbon Dioxide monitor designed to continuously track indoor air quality. Its LCD interface simultaneously displays CO₂ concentration, temperature, humidity, and date/time, offering a comprehensive view of environmental conditions. The device also uses intuitive emoticons to represent air quality levels at a glance helping users quickly assess whether ventilation is needed.
In operation, the A37 updates CO₂ readings every 3 seconds and triggers both audio and visual alarms including a red backlight when levels exceed approximately 1,000 ppm. Its automatic baseline correction (ABC) feature recalibrates in fresh-air conditions to maintain accuracy and reliability over time.
Designed for practical daily use, its built-in 3.7 V rechargeable Li-ion battery powers over 10 hours of continuous measurement. The monitor includes auto power-off, low battery indication, and a convenient Micro-USB charging port. Lightweight (around 195 g) and compact (75 × 55 × 130 mm), it comes in a protective case and is suitable for diverse indoor settings from offices and schools to homes and vehicles.
Features:
Specifications:
| Specifications | Range | Resolution | Accuracy |
| Carbon dioxide | 400ppm~5000ppm | 1ppm | ±(5%rdg + 50ppm) from 400ppm~2000ppm (at ambient temperature and humidity) |
| Temperature | -10.0℃~50.0℃ | 0.1℃ | Typical accuracy: ±1℃ |
| Relative humidity | 0%RH~99%RH | 1%RH | Typical accuracy: ±5%RH (10%RH~90%RH) at 25℃ |
| Features | |||
| ABC | Automatic baseline correction | √ | |
| Audible and visual alarm | √ | ||
| Sensor type | NDIR (no-dispersive infrared) CO2 sensor | √ | |
| Response time | √ | ||
| Date/time | √ | ||
| Low battery indication | √ | ||
| Auto power off | <2minutes | √ | |
| Backlight | √ | ||
| Operating temperature | 0℃~50℃, 0%RH~85%RH | √ | |
| Storage temperature | -20℃~60℃, 0%RH~95%RH | √ | |
| General Characteristics | |||
| Power | 3.7V DC Li-ion battery/ Micro USB charging port | ||
| Display | 42mm x 65mm | ||
| Product color | White and grey | ||
| Product net weight | 195g | ||
| Product size | 75mm x 55mm x 130mm | ||
Applications:
- Indoor Air Quality (IAQ) Assessment in Offices and Schools.
- HVAC System Ventilation Efficiency Verification.
- Greenhouse and Agricultural Grow Room Climate Control.
- Workplace Safety Monitoring in Confined Spaces.
- Home Environment Health and Comfort Optimization.
- Library and Archive Preservation Environment Monitoring.
Package Contents
- 1x A37 CO₂ Monitor
- 1x Protective case
- 1x USB (Micro-USB) cable
- 1x English user manual
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