BL400 - Wind, Temp, Humidity, Pressure

Skywatch Wireless Bluetooth BL400 Windmeter Anemometer: Wind Speed, Temperature, Humidity, Pressure

Built in Switzerland, the Skywatch BL400 is a complete weather station connected to your smartphone via Bluetooth wireless technology. It accurately measures wind speed, temperature, humidity, and measured data can be stored and shared on Facebook, Twitter, Instagram The Skywatch BL400 is especially dedicated to all outdoor activities like sailing, kite surfing, paragliding, hiking as well as professional use such for agriculture, construction, and more.

Enter into the vast world of connected devices (IoT) and big data with the Skywatch BL and its Bluetooth technology. Share your experiences and your measurements with your friends on the main social networks like Facebook, Twitter or Instagram. Attach the Skywatch BL to your backpack, hold it in your hand, and take it with you anywhere to get a snapshot of the current weather conditions with this pocket weather station. Use tracking mode and automatically record the weather data and GPS position. Based on recognized expertise and Swiss-made sensors, the Skywatch BL continues the tradition of quality instruments with an aluminum body, stainless steel parts and sapphire bearings. The Skywatch BL continues to innovate with its unique sensor protection system and even being the first device in the world to use the new Bluetooth Environmental Profile (ESP).


  • Windspeed
  • Wind Direction
  • Temperature
  • Wind Chill
  • Heat Index
  • Humidity
  • Dew Point
  • Pressure
  • Altitude
  • QNH


  • Omnidirectional propeller
  • Retractable sensor protects the sensor during storage and travel
  • Low inertia sensor measures accurately at low wind speeds
  • Bluetooth connection and battery level status indicators
  • Powered by rechargeable battery via micro USB, with charging indicator
  • Dimensions: Ø26 x 116 mm (closed, without clip)
  • Weight: 66g (without clip)
  • Made from anodized aluminum
  • Protection class IP67
  • Swiss official calibration
  • Black wrist strap

App Features

  • Instantaneous measurements
  • Graphical display of measurements with instantaneous, minimum, maximum, average and complementary values
  • Tracking mode with automatic recording of measurements and GPS coordinates
  • Sharing of measurements on Facebook, Twitter, Instagram
  • History of measurements taken
  • Display of all measurements on a map
  • Android 4.4 and newer
  • iOS 8.4 and newer
  • Compatible Bluetooth v4.0 and newer. Use the standard Environmental Sensing Profile (ESP) and Service Environmental Sensing (ESS)
  • Online firmware of the device
  • Languages: English, French

Technical specifications

  • Units
  • Resolution
  • Accuracy
  • Measuring range
  • km/h, m/s, mph, fps, knots and Beaufort
  • 0.1 unit
  • +/- 3% / +/-0.5 km/h
  • from 3 to 150 km/h


  • Units
  • Resolution
  • Accuracy
  • Measuring range
  • °C and °F
  • 0.1 unit
  • +/- 0.3 °C
  • from -25 to +60 °C


  • Units
  • Resolution
  • Accuracy
  • Measuring range
  • %HR
  • 0.1 unit
  • +/- 3 %HR (10-90 %HR)
  • from 0 to 100 %HR


  • Units
  • Resolution
  • Accuracy
  • Measuring range
  • hPa, mbar and inHg
  • 0.1 unit
  • +/- 0.2 hPa
  • from 300 to 1200 hPa

Skywatch smartphone weather instrument comparison table

Skywatch BL300
Skywatch BL400
Skywatch BL400
Skywatch Windoo1
Windoo 1
Skywatch Windoo2
Windoo 2
Skywatch Windoo3
Windoo 3
Maximum windspeed
Average windspeed
Wind direction
Wind chill
Electronic compass
Relative humidity
Dew point
Air pressure
UV index
Connection Bluetooth Audio connector