Retired Product
(not available for purchase)
The Q7_1 is an high-output thermopile sensor that generates a millivolt signal proportional to the net radiation level. The sensor is mounted in a glass-reinforced plastic frame with a built-in level. A ball joint is supplied on the stem to facilitate leveling. The sensor surface and surrounding surfaces are painted flat black to reduce reflections within the instrument and to achieve uniform performance over reflective and non-reflective surfaces. Sensor surfaces are protected from excessive convective cooling by hemispherical polyethylene windshields. Polyethylene is used for the windshield material because it is transparent to both long and shortwave energy. The windshields are open to the atmosphere through a desiccated breather tube to prevent the domes from collapsing at night. A mounting stake located away from the tower to decrease shading and interference is recommended. Net radiation measurement height is typically between 1 and 3 m.
(not available for purchase)
Features
- Measures difference between incoming and outgoing radiation
- High-output thermopile sensor
- Sensor surfaces are protected by hemispherical polyethylene windshields
- Spectral response is 0.25 to 60 µm
- Mounting arm included; user-supplied stake recommended
- Manufactured by REBS
Specifications
- 9.6 W m-2 mV-1 for positive values
- 11. 9 W m-2 mV-1 for negative values
- Time constant: Approximately 30 seconds
- Size of sensing head: 57 x 72 x 177 mm
- Support arm diameter: 20 mm
- Support arm length: 750 mm
