The ASPTC is a type E thermocouple housed in a white, elongated radiation shield. The radiation shield reduces solar loading on the thermocouple by drawing air across the measurement junction with a fan. The radiation shield also protects the thermocouple, increasing its durability. Typically, one ASPTC is mounted to each sensor arm in a Bowen ratio system. One ASPTC can either replace, or be measured in addition to, TCBR thermocouples. In a standard configuration, lead lengths of 15 feet are recommended for both signal and power cables. Features Uses fine wire thermocouple for highly accurate air temperature measurementsIncludes aspirated radiation shieldSolar loading on thermocouple reduced by drawing air across the measurement junction with a high-powered fanIntake velocity is 5.5 msecFan requires 12 Vdc power supplyFan average active current drain is 142 mA Specifications Shield Material: UV stabilized polyethylene Thermocouple Type: Chromel-Constantan Thermocouple Typical Output: 60 VC Air Velocity at Thermocouple: 5.5 m @ 12 Vdc Fan Life Expectancy: 60, 000 hrs @ 25C Fan Current Drain: 140 mA @ 25C Fan Thermal Fuse: opens @ 640 mA Fan Operating Voltage Range: 6 to 14 Vdc Fan Radiation Error:
Beijing, China
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Jack (Beijing Channel Scientific Instruments Co.,Ltd.)
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