Ecowitt WH43 Indoor PM2.5
Ecowitt · WH43
The Ecowitt WH43 is an indoor air quality sensor focused on PM2.5 particle measurement. It works as part of the Ecowitt ecosystem and requires a compatible gateway or console to view data, upload it to Ecowitt Weather, or integrate it with Home Assistant. It is a good option if you want a simple PM2.5 sensor for home, office, or lab use without paying for more advanced sensors with CO2 or PM10.
USB
✓ Pros
- Dedicated indoor PM2.5 sensor
- More affordable than more complete Ecowitt sensors
- Compatible with Ecowitt gateway
- Integrates with Home Assistant through a compatible gateway
- Can run on USB or batteries
- Allows AQI tracking and historical data within the Ecowitt ecosystem
✗ Cons
- Measures only PM2.5
- Does not measure CO2, PM10, temperature, or humidity
- Requires a compatible Ecowitt gateway or console
- No direct WiFi
- Not Zigbee or Matter
Compatibility
Home Assistant
Specifications
| Model | WH43 |
| Measurement | PM2.5 |
| Use | Indoor |
| Power | USB / batteries |
| Measurement interval with USB | 60 seconds |
| Measurement interval with batteries | 10 minutes |
| Connectivity | Ecowitt RF |
| Wireless range | Up to 100 meters in open field |
| Gateway required | Yes |
| Home Assistant integration | Through Ecowitt gateway |
| Power supply | USB / pilas |