Description Specifications Description This unit has been DISCONTINUED by TSI.TSI's AccuBalance® Air Capture Hood 8371 measures the air volume flowing through registers, diffusers, and grilles. The AccuBalance is a light weight easy-to-use instrument. Simply hold the AccuBalance up to a diffuser or grill and read direct airflow of a supply or exhaust on the large digital display.Included ItemsBaseBattery holder and (4) C-size batteriesBattery compartment coverCarrying caseOperation and service manualNIST calibration certificate2'x2' (610x610-mm) hood and frame hardware State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Product Specifications Flow Range:30 to 2,000 cfm (15 to 1,000 I/s, 50 to 3,500 m³/hr) Accuracy:±5% reading and ±5 cfm (±2.4 I/s, ±8.5 m³/hr) Operating temperature:32 to 140°F (0 to 60°C) Literature & Docs Accessories