WeatherFile Mobile Unit (WMU)

The WeatherFile Mobile Unit provides the means of connecting weather sensors via GSM to The WeatherFile data is accessed by any internet network connected pc, tablet or smart phone. Data is viewable on (talk to us if you prefer viewing your data via your own website).

Data is also directly accessible from the WMU's own WiFi on a local display page via its own IP address. The WMU has a micro SDHD card for long term storage of data and data backup if required.


  • Mobile network transfer of wind and weather data to
  • Display on viewable on any internet connected device
  • WMU provides Wi-Fi to enable access to a local data display page
  • Logs wind and weather data
  • Compatible with WindSonic, MaxiMet & MetPak & other RS232 sensors
  • Rugged IP67 compact enclosure with push fit IP67 connectors


The WMU is the heart of the FlexiMet GSM Weather System. By selecting your choice of Windsonic, Maximet or MetPak sensor, your ideal FlexiMet GSM system is easily configured. There is a diverse range of accessories such as alarms (audible and visual) and displays available.

The WMU's electronics are contained in a tough weatherproof (IP67) enclosure with high quality connectors for ease of installation. The compact design provides minimal windage.

If you need to keep your data private (such as commercially sensitive data) or the data is not applicable to the rest of the world, a log in to your private area on the site can be provided via SSL secure log in.

If you need help specifying the relevant wind system to integrate with the WMU, we have a range of sensors that can fit your needs, as well as a diverse range of accessories such as alarms and displays.

If you need help specifying the relevant wind system please contact us »


Weather, wind speed and direction data collection for:

  • Weather monitoring and warning
  • Construction industry, including crane operations
  • Health and safety site operations
  • Marine and offshore
  • Wind farm surveying and operations
  • Roads, bridges and tunnels
  • Agriculture and Horticulture
  • Sports and outdoor activities
  • Education and research projects
  • Site operations in aviation System Overview Diagram
Enclosure dimensions excluding mast mount but including connectors 80mm x 90mm x 180 mm
Mounting plate x 2 (SS 316) 2 x m6 holes (4 of 5 m6 dia) 30 mm x 75 mm (45mm ‘V’ Bolt)
Enclosure material Polycarbonate UL94V0
Connectors Binder 720 series
Weight 0.78kg
Sensor input  
Sensor types Gill Instruments: WindSonic & WindObserver series
MetPak & MaxiMet series
NMEA compatible wind sensors with RS232 output.
Please contact RPR Ltd. if you wish to use other sensors.
Other Sensor types Rain gauge, CO2, Moisture etc.
Transmission standard RS232 compatible, 8 bits and no parity
Wireless/network Connectivity  
Hotspot transmission standard Wi-Fi Certified 2.4GHz IEEE 802.11b/g 802.11i Security WPA2-PSK, WPA, WEP
3G / 4G / GPRS Internal aerial, 800/1900 MHz
Router 3G, GPRS via mobile network
Data Storage  
Data storage card Removable SDHC card
Data capacity 8 GB (standard) or as per memory card capacity
File system FAT16 or FAT32 with 8.3 file names
Sector size 512 Bytes
Remote Cloud Storage Data stored on the server (1)
Audible / Visual Indicators  
LED indicators SD card status
Data input status
Wireless connection status
Power Status alert
Audio bleeper Status alert
Real Time Clock  
Accuracy ±40 ppm at 25°C
Synchronisation SNTP - Simple Network Time Protocol (1)
GPS (2)
Power requirement 12 V DC ±10%
Current at 12 VDC 300 mA typical
Temperature range Operating: -25°C to +70°C
Storage: -40°C to +70°C
Enclosure protection IP67

The manufacturer reserves the right to amend the specification and therefore the information in this document may be subject to change.