Yankee Environmental Systems, Inc. Total Infrared Radiometer TIR-570

The Model TIR-570 Total Infrared Radiometer represents the state-of-the-art for making precise field measurements of downwelling broadband atmospheric infrared irradiance. The TIR-570 uses a advanced chopped pyroelectric detector and precision interference filter integrated with a self-contained black body source to measure spectral irradiance from 4 to 30μm. Global climate change researchers now have a tool for routine high accuracy field atmospheric IR measurements. The system consists of two basic components: a Detector Assembly and an electronics enclosure with top-mounted spherical mirror. The Detector Assembly consists of a black body radiation calibration source, a stepper motor-driven rotating chopper and pyroelectric detector mounted in a common housing. The electronics enclosure contains the microprocessor-contr olled data acquisition and digital lock-in amplifier circuitry. The TIR-570's broadband IR measurement complements the total solar irradiance measured by a pyranometer such as the Model TSP-700. A unique, internal black body radiation source supports null detection, and is the key to the system's excellent long-term calibration stability. It overcomes visible signal contamination issues that have historically plagued passive infrared radiometers.