Profile: Temperature Electronics Ltd. designs and manufactures electronic temperature controls for OEM companies & systems. Our CAV airflow monitors and VAV controls utilize a unique airflow sensor that is used to measure face velocities or duct velocities. The sensor has no inherent drift and will provide stable readings over many years of operation without the need for recalibration. The AFA500 & 1000 series of airflow monitors are designed to ensure the safety of the users of industrial fume cupboards, schools fume cupboards, fume hoods and bio safety cabinets.