Alnor AirGard^® 405 Fume Hood Monitor

The AirGard 405 continuously monitors fume hood face velocity by measuring the air velocity of clean air from the room passing through the air inlet on the front of the monitor. This simple, go/no-go alarm is a low cost option for your monitoring requirements. It is an easy to install surface mount monitor that only requires a single point calibration in the field. The device provides both visual and audible alarms to alert the user of abnormal airflow conditions. A green indicator on the front of the monitor indicates normal flow conditions. When flow conditions lower than the setpoint are encountered, a red indicator is activated along with an audible horn. This information can be sent to a remote location by means of a dry contact relay output.

Specifications
Alarm Range 70 to 250 fpm (.35 to 1.25 m/s).
Accuracy ±10% of set point or 10 fpm, whichever is greater.
Alarm Delay 5 seconds.
Audible Alarm Indication 85dB @ 4 inches (10 cm).
Visual Alarm Indication Red LED.
Relay Output 1.2A @ 12V DC
Horn Silence Temporary & permanent.
Input Selectable for either horn disable or alarm input.
Calibration Alarm set point potentiometer adjustment.
Instrument Dimensions
Front Faceplate 6.0L x 3.13W x 1.75D inch (15.24L x 7.95W x 4.45D cm).
Mounting Surface. (Monitor is mounted to metal backplate installed on surface).
Operating Conditions 55 to 86°F (13 to 30°C), 5% to 95% RH, non-condensing.
Storage Temperature -40 to 150°F (-40 to 65°C), 5% to 95% RH, non-condensing.
Power Requirement (Wall plug in power supply supplied for domestic units).
Nominal Input Voltage 12.0 ± 1.0VDC or 9.0 ± 0.5VAC.
Nominal Input Current 0.12ADC @ 12VDC input.