MaxiMet GMX541


Temperature, humidity, pressure

A combined instrument mounted inside three double louvered, naturally aspirated radiation shields with no moving parts.

The results are high performance across each measurement over long periods of time.

Solar Radiation

An integrated solar radiation sensor/pyranometer. This highly accurate instrument uses a thermal sensor mounted as its base and protected by a single glass dome to record the amount of light in watts per square metre.

It is widely used in agro-meteorological applications and for monitoring the performance of solar panels.


Wind speed and direction measurements are provided via an ultrasonic sensor and the addition of an electronic compass provides apparent wind measurements.

Average speed and direction together with WMO averages and gust data is also provided. Add GPS (optional) to provide true wind and other features.


The Optical rain gauge supplied provides excellent performance in a low maintenance package. The Optical RG connects via a 20m cable (included).


Product Description

MaxiMet GMX541

The MaxiMet range of compact weather stations is designed and manufactured by Gill Instruments. MaxiMet products use reliable, high-quality instruments to provide accurate meteorological information in a wide variety of applications.


Technical specs

Temp, Humidity & Pressure:

  • Air Pressure / Temperature
  • Relative / Absolute humidity
  • Naturally aspirated UV stable
    radiation shield
  • Protection against wind-blown

Solar Radiation:

  • Complies with ISO 9060 and WMO Guidelinesƒ
  • Output in watts per metre2ƒ
  • 180° hemispherical field of viewƒ
  • Records sunshine hoursƒ
  • Integrated Hukseflux LP02 pyranometer
  • Glass dome


  • Wind speed & directionƒ
  • Apparent and true wind (with GPS)ƒ
  • WMO wind averages and gust
  • Compass

Precipitation (INPUT):

  • 0.08 mm tip Optical rain gauge (customer selectable)
  • 20m Cable
  • Solar radiation W/m²
  • Sunshine hours hrs
  • Solar Noon
  • 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, km/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)
  • Height above sea level m
  • MSL pressure
  • Sunrise/sunset
  • The position of the sun
  • Twilight
  • Solar Noon
  • Quality Measurements
  • Lightweight and Robust
  • Low Power Mode
  • Free of Charge Software
  • Gill Proven Reliability
  • Compact Integrated Design
  • Real-Time Output
  • Easy Installation
  • Gill Customer Support
  • 2 Year Warranty
  • Building and Industrial Controls
  • Authorities
  • Transport
  • Coastal
  • Agricultural
  • Safety
  • Educational
  • Commercial
  • Energy

Optical Rain Gauge

An integrated optical rain gauge that automatically senses water hitting its outside surface and provides tip measurement.

Algorithms in the GMX541 interpret this data and simulate the output of a tipping bucket rain gauge as part of the serial output from the GMX541. The optical rain gauge has no moving parts associated with tipping bucket gauges.

Output and power to the GMX541 is via a 20m cable (included) that the user can cut to length.

Measurement type:

  • Optical RG


  • 0 to > 300 mm/hr

Precipitation Resolution:

  • 0.08 mm (Customer Selectable)


  • 3%
Sampling Rate:
  • 1 Hz
  • mm/hr, mm/total, in/hr, in/total
  • N/A
  • Contact closure via 20m cable to GMX
Power Supply:
  • 12Vdc via above 20m cable to GMX


Download MaxiMet GMX541 Spec
Download Maximet Manual



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