GMX300 Temperature, Humidity & Pressure Sensor 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.com website where data can be viewed using any internet connected device and downloaded for detailed analysis in a .CSV file format.

Applications

• Building and industrial controls
• Authorities
• Transport
• Coastal
• Agricultural
• Safety
• Educational
• Commercial
• Energy

Features

• Temperature, humidity and pressure sensor
• Naturally aspirated
• UV stable radiation shield
• Dust and precipitation protected
• Lightweight and compact
• Robust construction
• Low power consumption
• No moving parts
• Extremely low maintenance
• 24 months warranty

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	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
	MaxiMet GMX 100
	MaxiMet GMX 200
	MaxiMet GMX 300
	MaxiMet GMX 301
	MaxiMet GMX 400
	MaxiMet GMX 500
	MaxiMet GMX 501
	MaxiMet GMX 550
	MaxiMet GMX 551
	MaxiMet GMX 600

Choose your sensor based on the parameters you want to measure.


	GMX200	GMX240	GMX300	GMX301	GMX400	GMX500	GMX501	GMX550	GMX551	GMX600
Wind Speed
Wind Direction
Air Temperature
Humidity
Pressure
Dew Point
Wet Bulb Temperature
Precipitation (Optical Rain Gauge)
Precipitation (Tipping Rain Bucket Gauge)
Solar Radiation
Compass
Optional GPS Positioning
Side Connector for Rain Gauge