Item Description

The Gill MaxiMet GMX300 is an extremely compact, robust and lightweight solution for accurately measuring weather parameters. Three double-louvered naturally aspirated radiation shields deliver long term highly accurate data. Parameters measured include temperature, relative humidity, barometric pressure, absolute humidity, air density and wet bulb temperature.

The result is an extremely durable and cost effective weather station widely used for applications such as agriculture, health & safety, transport, education, energy and building controls. Richard Paul Russell Ltd. can connect the sensor to the WeatherFile website where data can be viewed using any internet connected device and downloaded for detailed analysis in a CSV file format.

Temp, Humidity & Pressure
Air Pressure / Temperature
Relative / Absolute humidity
Naturally aspirated UV stable radiation shield
Protection against wind-blown precipitation/dust

Parameters
Temperature °C / °F / °K
Relative humidity & Rh
Barometric pressure hPa, mbar, mm Hg, In Hg
Absolute humidity g/m3
Air density kg/m3
Wet bulb temperature °C / °F / °K
Angle of Tilt
Outputs RS232, 422, 485 (ASCII), SDI-12, NMEA, MODBUS, Analogue (option)

GPS (Manual)
Height above sea level m
Sunrise/sunset
Position of the sun
Twilight
Solar Noon
MSL pressure

Temperature
Range	-40°C to +70 °C
Resolution	0.1
Accuracy	± 0.3°C @ 20°C
Sampling Rate	1 Hz
Units	°C, °F, °K

Humidity
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

Pressure
Range	300 to 1100 hpa
Resolution	0.1 hPa
Accuracy	± 0.5 hPa @ 25°C
Sampling Rate	1 Hz
Units	hPa, mbar, mmHg, inHg

Outputs
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
Power Supply	5 to 30 Vdc
Power (Nominal) 12 Vdc	5 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	0.5 Kg
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.

User Manual
	MaxiMet User Manual - Issue 4

Data Sheet
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