The sun radiates a broad range of light from 300-1100nm. In agriculture, this total radiation is needed primarily to calculate Evapo transpiration (ET). ET is the amount of moisture leaving the ground through evaporation (from the ground) and transpiration (from the leaves), and is dependent upon light, wind speed, temperature, and relative humidity.
3670i Silicon Pyranometer Sensor
Watch Dog Barometric Pressure Sensor
Works with WatchDog Models 125, 150, 225, 400, 425, 450, Stations 2525, 2550, 2600, 2700, 2800
Watch Dog Model 3671 Barometric Pressure Sensor
Can be programmed to record in either metric ( mm ) or U.S. (inches) of Hg. All sensors include a 6-foot cable with pin-type connector.
To connect an external sensor to the logger, plug the sensor cable into the logger port that has been programmed for that particular sensor. If the sensor is not connected, the message "sensor error" will appear on the LCD display for the respective logger port until the sensor is connected.
|6451||Irrigation On/Off Sensor|