The fume hood monitor is used to notify the user if the hood is not safe to use.


To have a air flow (velocity), a differential air pressure must be present.

Higher the pressure, higher the air velocity. 


The fume hood monitor is calibrated for two specific points: 


Measurement range ±125Pa

Accuracy 0.08 Pa

Span Accuracy 3%

Offset stability <0.05 Pa/year 


Buzzer 80 Decibels

Intuitive Display

One button action

Easy calibration process

Easy installation


ATEK Transmitter with differential pressure module and display

Power supply

2’  silicon tubing

18” aluminum tube

Fastening Hardware


Air flow  : Flow of air or any other fluid is caused by a pressure differential between two points.  Flow will originate from an area of high energy, or pressure, and proceed to area(s) of lower energy or pressure.

Air velocity : Air velocity (distance traveled per unit of time) is most often expressed in feet per minute (FPM). In a hood, we want the air to move fast enough to catch fumes with it and keep the environment safe.



Per ANSI Z9.5-2012, Section 8.10:

“All Hoods and exposure control devices shall be equipped with a flow indicator, flow alarm, or face velocity alarm indicator as applicable to alert users to improper exhaust flow.”

Per NFPA 45-2015, Section 7.8.7:

“A measuring device for indicating that the hood airflow remains within safe design limits shall be provided on each chemical fume hood… The measuring device for hood airflow shall be a permanently installed device and shall provide continuous indication to the hood user of adequate airflow and alert inadequate hood airflow by a combination of an audible and visual alarm. Where an audible alarm could compromise the safety of the user or the research, alternative means of alarm shall be considered.”  

Per 29 CFR 1910.1450, Appendix A, OSHA Laboratory Standard:

 “. . . . each hood shall have a continuous monitoring device to allow convenient confirmation of adequate hood performance before use. If this is not possible, work with substances of unknown toxicity should be avoided or other types of local ventilation devices should be provided… chemical hoods should be maintained, monitored, and routinely tested for proper performance.” 

Per Prudent Practices, Section 9.C.2.4:

 “Make sure that a continuous performance monitoring device is present, and check it every time the chemical hood is used.”

Per SEFA-1, Section 4.1.10:

 “All hoods shall have some type of monitor for indicating face velocity or exhaust flow verification.  The monitor can be a simple pressure gage connected to a Pitot tube in the exhaust duct, one of many electronic monitors, or a vaneometer.  Regardless of the monitor installed, it should provide clear indication to the hood user whether exhaust flow or face velocity is within design parameters.  A ribbon taped to the bottom of the sash is not acceptable.”


Le transmetteur de pression ATEK peut s'installer sur le circuit (tuyau) de vacuum de la hotte afin de mesurer la pression et déduire la vélocité de l'air.