UNI-T A25D Air Quality Monitor
The UNI-T A25D is a desktop-style air quality monitor that brings together environmental sensing into a compact package. It presents itself as a modern, upright instrument with a backlit display that makes data visible at a glance. The design suggests both a home or office use, where users want immediate visual feedback about indoor air quality without complexity.
Once powered on, the A25D continuously monitors fine particulate matter (PM2.5) as well as ambient temperature and humidity. The display is intuitive: numerical readouts are paired with emoticons or color cues to indicate safe or concerning levels. There’s a visible alert mechanism, such as red backlight when PM2.5 levels cross warning thresholds, which helps users quickly see when air quality degrades. Even though it is sensor-based and automated, it remains easy to interpret without needing technical expertise.
In regular daily use, the A25D acts as a sentinel: placed in a main living room, classroom, or workspace, it quietly tracks air quality, offering cues to open windows, turn on purifiers, or reduce indoor pollutant sources. It’s built to run continuously, with auto power-off or baseline correction ensuring stable readings over time. It doesn’t attempt to do everything, but what it does is direct: keeping occupants aware of what’s in the air around them. Over months, it becomes part of someone’s environment habit, helping maintain healthier conditions.
Features:
- Precise PM2.5 concentration based on pre-calibrated sensors
- Temperature measurement (°C/°F)
- Humidity measurement
- Emoticon display
- LCD backlight and red backlight alarm
- Battery status, low power, auto power off
Specifications:
| Specifications | Range | A25D |
| PM2.5 (ug/m³) | 0~100 | ±(10ug/m³+10dgts) |
| 101~400 | ±(10%+30dgts) | |
| 401~500 | ±(10%+50dgts) | |
| Temperature (℃) | 0~2mg/m³ | ±1℃ |
| Temperature (℉) | 0~2mg/m³ | ±1.8℉ |
| Humidity | 5%~99%RH | ±5%RH@30%~80%RH |
| ±8%RH@<30%RH, >80%RH | ||
| Features | ||
| Auto power off | √ | |
| Low battery indication | √ | |
| Red backlight alarm | √ | |
| LCD backlight | √ | |
| Concentration emoticon | √ | |
| General Characteristics | ||
| Power | 1500mAh rechargeable polymer battery | |
| Display | 42mm x 65mm | |
| Product color | White and grey | |
| Product net weight | 230g | |
| Product size | 75mm x 55mm x 130mm | |
| Standard carton measurement | 360mm x 185mm x 140mm | |
| Standard carton gross weight | 2.35kg | |
Applications:
- Indoor air quality monitoring.
- Office / classroom environment.
- Homes & residential settings.
- Public spaces (e.g. lobbies, waiting areas).
- Sensitive environments such as hospitals or laboratories.
Package Contents:
- 1x Air Quality Monitor unit (A25D)
- 1x Rechargeable polymer battery (1500 mAh) (installed)
- 1x Micro USB interface cable
- 1x English manual
- 1x Gift box / blister packaging / unit packaging
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