Technical Specifications
Device configuration
| Item | Specification |
|---|---|
| Models | AM7 plus (7 indicators) / AM6 (6 indicators, without CO₂) |
| PM2.5/PM10 | Laser scattering, 0–999 μg/m³, resolution 1, error ±10 μg/m³ |
| Formaldehyde | Electrochemical 2-FE5 + V4 module, 0–3.00 mg/m³, resolution 0.01, error less than ±0.02 mg/m³ |
| TVOC | TGS2602 semiconductor sensor, 0–2.00 mg/m³, resolution 0.01, error ±0.1 mg/m³ |
| CO₂ | S80053 NDIR infrared sensor, 350–5000 ppm, resolution 1, error ±50 ppm |
| Temperature / humidity | SHT20: temperature -25 to 85 °C ±1.0 °C; humidity 0–99 %RH ±8 % |
| Calibration | Outdoor baseline zeroing; supports environments down to -10 °C; recommended once a month |
| Data storage | TF card up to 32 GB; one record every 4 seconds; approximately 1 MB/day; Excel-readable |
| Connectivity | Wi-Fi 802.11b/g/n 2.4 GHz, connected to the Gizwits IoT platform |
| Provisioning | AirKiss one-tap provisioning / direct connection through WeChat |
| User interface | WeChat service account; no app installation required |
| Battery | Replaceable 18650 lithium battery; approximately 6 hours of runtime |
| Charging | Micro-USB, 5 V / 1 A or higher; maximum voltage 4.35 V |
| Continuous operation | Supports 24/7 USB power |
| Operating conditions | 0–40 °C; 10–85 %RH, non-condensing |
| Dimensions / weight | 79 × 113 × 30 mm / approximately 164 g (bare unit: 79 × 95 × 23 mm / approximately 127 g) |
| Applicable standard | GB/T 18883-2002, Indoor Air Quality Standard |
Average sensor service life
| Sensor | Average service life | Main degradation mechanism |
|---|---|---|
| PM2.5/PM10 | 3+ years | Mechanical wear |
| Formaldehyde | 3 years | Catalyst depletion |
| TVOC | 3–5 years | Surface contamination |
| CO₂ | 10+ years | Optical degradation |
| Temperature and humidity | 5+ years | Surface contamination |
Sensors use hot-swappable modular construction and can be replaced at the end of their service life without returning the entire device for repair. See Product Overview for the structure.
:::warning Calibration recommendation Perform an outdoor baseline-zero calibration for the formaldehyde and TVOC channels once a month. Move the device to a well-ventilated outdoor location to keep long-term reading drift under control. :::