Guardian™ Airflow Monitors continuously monitor and display airflow for a variety of fume hoods, enclosures and glove boxes. They alert the operator to airflows that drop outside preset levels with audible and visual alarms. The audible alarm can be muted at the touch of a switch.
Guardian™ 500 and Digital Airflow Monitors have a face plate, allowing the user to easily select and calibrate a setpoint between 50 and 250 fpm using a velocity meter. Digital Monitors have an LCD that displays actual face velocities. The Guardian 1000 digital monitor features display of actual airflow in fpm or m/sec. from 0–999fpm. On the Guardian Jr. monitor, a green light glows when the velocity is normal. If the face velocity falls below setpoint for more than six seconds, the audible alarm sounds and the alert indicator glows red.