Features:
- Wi-Fi enabled, 7.5" LCD color display, 8 physical buttons.
- Support DC powered and 3 x AA Alkaline / Lithium batteries powered (Batteries not included).
- Calendar, date, time, moon phase, sunrise, sunset, alarm & snooze, DST (Daylight Saving Time), 5 levels backlight adjustable, unit setting, record max & min value, RST function (Clear daily max/min values), standing & wall hanging option.
- Built-in temperature humidity sensor, and barometric pressure sensor.
- Supports optional sensors to receive and display 8 channels temperature and humidity, wind speed, wind direction, rainfall, UV, solar radiation, feels like, dew point, CO2, PM1.0, PM2.5, PM10, and AQI data.
- Weather forecast: Sunny, Partly Cloudy, Cloudy, Rainy, Stormy, Snowy and Storm Snowy.
- Built-in WiFi support Wi-Fi configuration via Ecowitt App & Web page(192.168.4.1).
- Support uploading data to the weather station server after
connecting to the Wi-Fi network:
■ ecowitt.net (Default upload to this server)
■ wunderground.com
■ weathercloud.net
■ wow.metoffice.gov.uk
■ Customized servers - Data storage and download on Ecowitt server: https://ecowitt.net.
NOTE: It is not a standalone product and needs to be used in conjunction with other sensors.
DC power supply is required to enter Wi-Fi configuration.
Compatible Add-On Sensors & IoT Devices(sold separately)
1 - WS90 Sensor Array
1 - WS85 Sensor Array
1 - WS80 Sensor Array
1 - WS69/WN67 Sensor Array
1 - WS68 Sensor Array
1 - WN20 Mini Rain Gauge
1 - WH40/WH40H Rain Gauge
1(upload only) - WH57 Lightning Detector
1 - WH45/WH46/WH46D Air Quality Sensor
1(upload only) - WN38 Black Globe Thermometer
1 - WN32/WN32EP Outdoor Temperature and Humidity Sensor
1 - WN32P Indoor Temperature, Humidity, and Pressure Sensor
4(upload only) - WH55 Leak Detector
4(upload only) - LDS01 Laser Distance Sensor
4(upload only) - Any combination of WH41 and WH43 Air Quality Sensor(PM2.5)
8(upload only) - WN35 Leaf Wetness Sensor
8(upload only) - Any combination of WN34L, WN34S, and WN34D Temperature Sensor
8 - Any combination of WN31/WN31EP Temperature & Humidity Sensors, WN30 Temperature Sensors, and WN36 Pool Thermometers.
16(upload only) - Any combination of WH51, WH51L, WH52 Soil Sensor
16(upload only) - Any combination of WFC01 Water Timer, AC1100 Smart Plug and WFC02 Ball Valve Timer
NOTE: Please note that when the gateway or console is connected to multiple sensors measuring the same parameter, the system will prioritize and display data from the sensor with the highest priority.
| Data Reception Priority | Model |
| Outdoor Temperature and Humidity | WN32/WN32EP > WS90 > WS80 > WS69/WN67 |
| Air pressure, Indoor Temperature and Humidity | WN32P > Gateway/Console built-in sensors |
| Wind | WS85 > WS90 > WS80 > WS68 > WS69/WN67 |
| Traditional Rainfall | WH40/WH40H > WN20 > WS69/WN67 |
| Piezoelectric Rainfall | WS85 > WS90 |
| Solar Light and UVI | WS90 > WS80 > WS68 > WS69/WN67 |
Specifications:
|
Model |
WS3900 |
|
Name |
Weather Station (receiver) |
|
Dimensions |
209×28.5×142.5(mm) |
|
Screen Size |
169×94.5(mm) |
|
Weight |
366(g) |
|
Material of Plastic Casing |
ABS |
|
Material of Screen |
VA-LCD |
|
Temperature Metering Range |
-9.9°C to 60°C(14°F to 140°F) |
|
Temperature Metering Accuracy |
±0.2°C(±0.4℉) |
|
Temperature Metering Resolution |
0.1°C(0.2℉) |
|
Humidity Metering Range |
1% to 99% |
|
Humidity Metering Accuracy |
±2% |
|
Humidity Metering Resolution |
1% |
|
Barometric Pressure Metering range |
300 to 1100 hPa (8.85 to 32.5 inHg) |
|
Barometric Pressure Metering accuracy |
±1.5hpa(absolute pressure ); ±2hpa(relative pressure) |
|
Barometric Pressure Metering resolution |
0.1 hPa (0.01 inHg) |
|
Reading Update Interval |
About 1 minute |
|
RF Connection Frequency |
915/868/433MHz (depending on local regulations) |
|
RF Wireless Range |
Over 100 meters (in open areas) |
|
WLAN |
802.11 b/g/n 2.4 GHz |
|
WLAN Range |
Over 30 meters (in open areas) |
|
Console Operating Temperature |
-10°C to 50°C(14℉ to 122℉) |
|
Power Supply |
DC 5V 1A or 3 AA Alkaline or Lithium Battery (not included) |
|
Battery Life |
15-25 days (Back-up only) |
Package Included:
1 x WS3900 Weather Station Receiver
1 x User Manual
1 x DC to USB Cable
| Built-in sensor measurement | |||
|---|---|---|---|
Pressure |
|
|
|
Indoor Thermo-Hygrometer (Temp & Humidity) |
|
|
|
CO₂ |
—
|
|
—
|
| Display Content | |||
Rainfall |
|
|
|
Wind Speed |
|
|
|
Wind Direction |
|
|
|
Relative Pressure |
|
|
|
UV Index / Solar Radiation |
|
|
|
Indoor Temperature |
|
|
|
Indoor Humidity |
|
|
|
Outdoor Temperature |
|
|
|
Outdoor Humidity |
|
|
|
Multi-Channel Thermo-Hygrometer (Temp & Humidity) |
|
|
|
Dew Point |
|
|
|
Wind Chill |
|
|
|
Heat Index |
|
|
|
Moon Phase |
|
|
|
Sunrise & Sunset |
|
|
|
Forecast (Pressure Based) |
|
|
|
| Console Features | |||
Manage sensor on console |
|
|
|
Built-in a Wi-Fi Gateway |
|
|
|
| Power | |||
Power cord supply |
|
|
|
Battery supply |
|
|
|
| Connection & Data | |||
Wi-Fi (2.4G only) |
|
|
|
RF Wireless protocol |
|
|
|
| Addable | |||
Ecowitt IoT Device |
|
|
|
Ecowitt Sensor |
|
|
|
Compatibility Instructions
for all ecowitt network consoles
Please refer to the table to choose the correct sensors and consoles before checkout.
Note:
1) "1/4/8/16" = max number of sensors supported per console (excluding accessories).
2) Upload only = sensor readings shown only in the Ecowitt app and cloud (www.ecowitt.net).
3) Firmware (e.g. V1.9.6 / V2.0.2) = gateway/console must run this version or newer.


