MaxiMet GMX531

MaxiMet GMX531 Compact Weather Station

with FREE UK Standard Delivery

£-- inc VAT (from £ ex VAT)

Add WindSonic Connector @ £ ex VAT)

• Temperature, humidity and pressure sensor
     • Naturally aspirated
     • UV stable radiation shield
     • Dust and precipitation protected
• Solar radiation sensor/pyranometer
     • Measures light in watts per metre2
     • Records sunshine hours
     • Complies with ISO 9060 and WMO guidelines
• Wind sensor
     • Wind speed & direction
     • Apparent wind
     • WMO wind averages, gusts
     • Built in compass
     • GPS *Optional provides true wind, latitude, longitude and height above sea level • Precipitation
     • 0.2mm tip Kalyx tipping bucket
     • Connects by cable (20m supplied)
     • Ideal for tropical and heavy convective locations
• Robust construction
• 24 months warranty
• Simple and easy to install

Processing Mon-Fri
on all in-stock models
Free standard delivery
Next day delivery available
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Item Description

The Gill MaxiMet GMX531 combines the GMX101, GMX200 and GMX300 with a Kalyx tipping bucket rain gauge. It isideal for measuring a full set of weather parameters, including precipitation in extreme heavy tropical downpour locations.

Three double-louvered naturally aspirated radiation shields deliver long term highly accurate weather data. Parameters measured include temperature, relative humidity, barometric pressure, absolute humidity, air density and wet bulb temperature. Additionally a Kalyx tipping bucket rain gauge with a 20m cable provides the ultimate in precipitation measurement.

The thermal sensor protected by a single glass dome records the quantity of light per metre calculating solar radiation (W/m2), sunshine hours, twilight, sunrise, sunset, position of sun, solar noon and angle of tilt.

The solid state ultrasonic sensor provides extremely accurate wind speed and direction measurements. An electronic compass comes as standard which delivers apparent wind, WMO wind averages and gust data.

The optional GPS adds the benefit of a true wind measurement, height above sea level, latitude and longitude, and simplifies installation by automatically finding north.

The result is a complete state of the art weathering monitoring solution widely used for applications such as agriculture, health & safety, transport, education and energy.

Temp, Humidity & Pressure
Air Pressure / Temperature
Relative / Absolute humidity
Naturally aspirated UV stable radiation shield
Protection against wind-blown precipitation/dust
Solar Radiation
Complies with ISO 9060 & WMO Guidelines
Output in watts per metre2
180° hemispherical field of view
Records sunshine hours
Integrated Hukseflux LP02 pyranometer
Glass dome
Wind speed & direction
Apparent and true wind (with GPS)
WMO wind averages and gust
GPS (Option)
Height above sea level m
Position of the sun
Solar Noon
MSL pressure
Precipitation (Input)
0.2mm tip Kaylx rain gauge
20m Cable
Solar radiation W/m2
Sunshine hours hrs
Temperature °C / °F / °K
Relative humidity % Rh
Barometric pressure hPa, mbar, mm Hg, In Hg
Wet bulb temperature °C / °F / °K
Absolute humidity g/m3
Air density kg/m3
Precipitation mm/hr, mm/total, in/hr, in/total
Wind speed m/s, hm/hr, mph, kts, ft/min
Wind direction °
Wind chill °C / °F / °K
True/apparent wind
Angle of Tilt
Outputs RS232, 422, 485 (ASCII), SDI-12, NMEA, MODBUS, Analogue (option)
Wind Speed
Range 0.1 m/s to 60 m/s
Accuracy ± 3% to 40 m/s,
± 5% to 60 m/s
Resolution m/s 0.01
Starting Speed 0.1 m/s
Sampling Rate 1 Hz
Units m/s, km/hr, mph, kts, ft/min
Wind Direction
Range 0-359°
Accuracy ± 3% to 40 m/s,
± 5% to 60 m/s
Sampling Rate 1 Hz
Units Degrees
Range -40°C to +70 °C
Resolution 0.1
Accuracy ± 0.3°C @ 20°C
Sampling Rate 1 Hz
Units °C, °F, °K
Range 0-100%
Resolution 1%
Accuracy ± 2% @ 20°C (10%-90% RH)
Sampling Rate 1 Hz
Units % Rh, g/m3
Dew Point
Range -40°C to +70°C
Resolution 0.1
Accuracy ± 0.3°C @ 20°C
Units °C, °F, °K
Sampling Rate 1 Hz
Range 300 to 1100 hpa
Resolution 0.1 hPa
Accuracy ± 0.5 hPa @ 25°C
Sampling Rate 1 Hz
Units hPa, mbar, mmHg, inHg
Measurement type TBRG (Kalyx)
Range 0-1000 mm/hr
Precipitation Resolution 0.2 mm
Accuracy 2%
Sampling Rate 1 Hz
Units mm/hr, mm/total, in/hr, in/total
Heating n/a
Output Contact closure via 20m cable to GMX
Global Solar Radiation
Wavelength Sensitivity 300 to 3000 nm
Output Range 0 to 1600 W/m2
Resolution 1 W/m2
DIN Standard ISO 9060 Second Class
Sampling Rate 1 Hz
Units W/m2
Output rate 1/s, 1/min, 1/hr
Digital Comms Modes Serial RS232, RS422, RS485, SDI-12, NMEA, MODBUS, ASCII
Analogue Outputs Available via seperate optional device
Power Supply 5 to 30 Vdc
Power (Nominal) 12 Vdc 25 mA continuous high mode 0.7 mA eco-power mode (1 hour polled)
Environmental Conditions
IP Rating 66
Operational Temperature Range -40°C to +70°C
EMC Standard BS EN 61326 : 2013
FCC CFR47 parts 15.109
CE Marking Yes
RoHS compilant Yes
Weight 0.8 Kg (+1.2 kg Rain Gauge inc Cable)
Origin UK

Precipitation Care & Maintenance
NOTE: the temperature, humidity and barometer sensors are located internally and are not maintainable or replaceable by a user. Consideration should be given to checking the pressure readings against a standard every 12 months and maintaining the temperature and humidity sensor every 12-24 months. If required you can return the MaxiMet to Richard Paul Russell Ltd to check the barometer calibration, please contact us at sales@r-p-r.co.uk for more details.

Case Studies

Our following Case Studies give an overview of how this product applies to different sectors.
Please click on the title below to read the full case study.

Emergency Services
Environmental Monitoring (with SpaceLogger Data Loggers)
Environmental Monitoring (with Wind Systems)
Health & Safety Monitoring
Marine, Ships & Harbours
Outdoor Sports
Tower Cranes
Transport Safety