Huidu HD-S90 nine-element weather sensor
The HD-S90 combines nine environmental measurements in one weather station. It is designed for projects that need local weather and air-quality readings sent to an RS485/Modbus-compatible host, such as monitoring software or a PLC. Check the host’s protocol and wiring requirements before installation.
What does the HD-S90 measure?
| Channel | Measurement |
|---|---|
| 1 | Temperature |
| 2 | Relative humidity |
| 3 | Wind speed |
| 4 | Wind direction |
| 5 | Noise |
| 6 | Light intensity |
| 7 | Atmospheric pressure |
| 8 | PM2.5 particulate matter |
| 9 | PM10 particulate matter |
Key features and specifications
- Ultrasonic wind sensing: measures wind speed and direction without a mechanical start-up wind-speed threshold; the manufacturer specifies 360° directional measurement.
- Integrated air-quality sensing: collects PM2.5 and PM10 measurements in the same unit.
- Communication: RS485 output using standard Modbus communication.
- Power: 10–30 V DC; maximum power consumption 1.2 W.
- Installation: install the unit horizontally. According to Huidu, a version with a built-in electronic compass does not require a particular compass orientation.
The manufacturer lists a 30–120 dB noise measurement range, 0–1,000 μg/m³ range for PM2.5 and PM10, and 0–120 kPa atmospheric-pressure range. Consult the specification for measurement accuracy, wiring and configuration details.
Installation and integration notes
Supply the HD-S90 with 10–30 V DC and connect its RS485 A/B lines according to the specification. Do not reverse A and B. If several RS485 devices share a bus, assign unique addresses. Confirm the receiving controller or software supports the sensor’s Modbus data before ordering.
Frequently asked questions
Is the HD-S90 a display controller?
No. It is an environmental sensor with an RS485 data output. A compatible controller, PLC or monitoring system is needed to read and use its measurements.
Which nine parameters are included?
Temperature, humidity, wind speed, wind direction, noise, light intensity, atmospheric pressure, PM2.5 and PM10.
What power supply does it require?
Huidu specifies 10–30 V DC for the HD-S90.
Product images
Specification and support
Download specification: Huidu HD-S90 Nine Elements Sensor Specification (PDF).
For wiring details and the latest model information, see the Huidu HD-S90 manufacturer product page. Contact us to confirm compatibility for your monitoring or LED-display project.
Conclusion
The Huidu HD-S90 puts nine weather and air-quality measurements in one RS485/Modbus sensor. Verify your host’s protocol and power requirements, then use the specification to plan wiring and installation.
