ECOWITT WS90BN
Ecowitt WS90 7-in-1 Weather Sensor Instruction Manual
Model: WS90BN | Brand: ECOWITT
1. Introduction
The Ecowitt WS90 7-in-1 Weather Sensor is an integrated outdoor sensor designed to collect accurate environmental data. This manual provides essential information for the proper setup, operation, and maintenance of your WS90 sensor.
Note: The WS90 weather sensor is a standalone sensor and cannot be used alone. It requires pairing with an Ecowitt Wi-Fi gateway, hub, or console (sold separately) for data viewing and configuration.
The sensor measures: temperature, humidity, wind direction, wind speed, light levels, UV levels, and rainfall data.

Figure 1: Diagram of the Ecowitt WS90 7-in-1 Weather Sensor, highlighting its components including the haptic rainfall sensor, solar panel, UV sensor, ultrasonic wind speed sensor, and temperature/humidity sensor.
2. Setup
2.1 Unboxing and Initial Inspection
Carefully remove all components from the packaging. Verify that all items listed in the package contents are present and undamaged.
- WS90 7-in-1 Weather Sensor
- Instruction Manual
- Mounting accessories (screws, straps)
- USB Power Cord (for hub/console, not sensor)
- Ethernet Cable (for hub/console, not sensor)

Figure 2: The Ecowitt WS90 7-in-1 Weather Sensor unit.
2.2 Power Supply
The WS90 sensor is equipped with a built-in solar panel for power autonomy and requires 2x AA batteries (not included) for backup power. Ensure batteries are inserted correctly into the battery compartment.

Figure 3: Illustration of the dual power supply system, showing the built-in solar panel and the AA LR6 battery compartment.
For cold climates, an optional DC 12V adapter and heating power cord (sold separately) can be connected to prevent snow accumulation and ensure continuous operation below 5°C.
2.3 Mounting the Sensor
Install the weather station on a 1-inch mounting tube or pole (not included). The fit should be snug to prevent movement, which is crucial for accurate sensor readings.
- Secure the sensor to the mounting pole using the provided accessories.
- Orient the sensor: Use a compass to align the "N" (North) marker on the sensor with true North. This ensures accurate wind direction readings.
- Ensure the mounting location is free from obstructions that could interfere with wind, rain, or light measurements.

Figure 4: Examples of suitable installation locations for the WS90 sensor, such as a farm, garden, or driveway, emphasizing open areas for optimal data collection.
The sensor is designed to be robust and withstand various weather conditions, meeting Waterproof IPX5 Standards and made from Thermal Insulation Materials.
3. Operating the Sensor
3.1 Pairing with a Gateway/Console
The WS90 sensor transmits data wirelessly. To view live data, you must pair it with a compatible Ecowitt Wi-Fi gateway (e.g., GW2000, GW1100) or display console (e.g., HP2550/HP2560, WN1920/1980, WN1820/1821). Refer to your gateway/console's manual for specific pairing instructions.
Once paired and Wi-Fi configured, data can be viewed on the WS View Plus or Ecowitt APP.
3.2 Data Transmission and Online Services
The sensor has a long transmission range of up to 150m (500ft) with obstacles and up to 300m (1,000ft) in open space.
After Wi-Fi configuration with a hub/display console, the WS90 can upload sensor data to various internet-based weather services, including:
- Ecowitt Weather (ecowitt.net)
- Weather Underground
- Weather Cloud
- Weather Observation Website (WOW)
- Customized Websites (if compatible with Wunderground or Ecowitt protocol)
Ecowitt Weather (ecowitt.net) allows you to view data graphs and download historical records. Email alerts can also be set up for the Wittboy weather sensor.

Figure 5: Overview of the Ecowitt Weather Station ecosystem, showing various sensors and hubs connecting to online platforms.

Figure 6: Data from the WS90 sensor can be viewed and shared on computers and mobile phones via the WS View Plus or Ecowitt APP.
4. Maintenance
4.1 Battery Replacement
The sensor uses 2x AA batteries as a backup power source. Monitor battery levels via the Ecowitt app or console. Replace batteries when low to ensure continuous operation, especially during periods of low sunlight.
4.2 Cleaning the Sensor
Periodically inspect the sensor for dirt, debris, or insect nests that might obstruct the wind or rain sensors. Gently clean the exterior with a soft, damp cloth. Avoid using abrasive cleaners or harsh chemicals.
The Haptic Rainfall Sensor is designed for near-zero maintenance and is less affected by harsh weather conditions compared to traditional rain gauges.

Figure 7: Comparison illustrating the Haptic Rainfall Sensor's design with no moving parts, offering anti-vibration and near-zero maintenance benefits over conventional rain gauges.
4.3 Sensor Component Replacement
The temperature and humidity sensor is a replaceable module, meeting IPX5 waterproof standards. This allows for easy replacement if needed, extending the lifespan of the main unit.

Figure 8: Diagram showing the replaceable temperature and humidity sensor kit, emphasizing ease of maintenance.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No data displayed on console/app. | Sensor not paired or out of range; low batteries; gateway/console not configured. | Ensure sensor is within range of gateway/console. Check and replace batteries. Verify Wi-Fi configuration of gateway/console. |
| Inaccurate rain data. | Raindrop size/wind speed affecting haptic sensor; sensor not level. | Ensure sensor is mounted level. For highly demanding accuracy, consider using WH40 rain gauge with WS90 (sold separately). |
| Inaccurate wind direction/speed. | Sensor not oriented North; obstructions near sensor. | Re-orient sensor to true North. Clear any obstructions around the sensor. |
| Low battery alerts despite solar panel. | Insufficient sunlight; prolonged cloudy/rainy periods. | Ensure solar panel is clean and not obstructed. Consider using the optional DC 12V power supply in consistently low-light or cold conditions. |
For further assistance, refer to the official Ecowitt support resources or contact customer service.
6. Specifications
| Feature | Detail |
|---|---|
| Model Number | WS90BN |
| Sensor Type | 7-in-1 Integrated Outdoor Weather Sensor (Temperature, Humidity, Piezo. Rain Gauge, Wind Speed & Direction, UV Light, Solar Panel) |
| Power Source | Solar Powered (built-in solar panel) or Battery Powered (2x AA batteries, not included) |
| Waterproof Rating | IPX5 |
| RF Frequency | 915 MHz |
| Transmission Range | Up to 150m (500ft) with obstacles, up to 300m (1,000ft) in open space |
| Connectivity | Requires Ecowitt Wi-Fi Gateway/Console (sold separately) |
| Dimensions | 8.9 x 4.53 x 3.9 inches; 1.21 Pounds (Package Dimensions) |
| Material | Thermal Insulation Materials |

Figure 9: Detailed dimensions of the Ecowitt WS90 sensor.
7. Support and Warranty
7.1 Official Resources
For the most up-to-date information, firmware updates, and detailed FAQs, please visit the official Ecowitt website: www.ecowitt.com
You can also access the Ecowitt Weather server for data viewing and history records at: ecowitt.net
7.2 Warranty Information
Ecowitt products typically come with a manufacturer's warranty. Please refer to the warranty card included with your product or visit the official Ecowitt website for specific warranty terms and conditions.
Protection plans are also available for purchase through authorized retailers to extend coverage beyond the standard manufacturer's warranty.
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.