General dilution ventilation and local exhaust ventilation systems keep your workforce safe only if they are operating effectively. We are with you for properly maintaining your anemometers whether they are rotating, thermal, swinging vane, or pitot/manometer instrumentation. Numerous wind tunnel systems by GDJ, TSI, and Omega drive the airflow under pressure controlled environmental systems at CIH. Low flows of less than 1,000 fpm are achieved by orifice plates and higher speeds are generated up to 9,000 fpm to handle the most common specifications. Our laboratory is also capable of calibrating added functions like relative humidity, temperature, carbon monoxide and carbon dioxide. All functions are traceable to NIST in our A2LA ISO 17025-2017 accredited laboratory.