I suppose the simplest flow monitor is a manometer connected as a static pressure indicator to a straight length of exhaust duct and mounted on the face of the hood, and calibrated once or twice per year against a face velocity measurement. It is always a good idea to have an air flow indicator on a chemical fume hood in a location that can readily be seen by the hood user. Whether it is a legal requirement or not apparently depends on whether you are in California. Peter Zavon, CIH Penfield, NY PZAVON**At_Symbol_Here**Rochester.rr.com > -----Original Message----- > From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**list.uvm.edu] > On Behalf Of Mary Ellen A Scott > Sent: Wednesday, July 15, 2009 4:42 PM > To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU > Subject: [DCHAS-L] Air Flow Monitors for fume hoods > > Does anyone have an inexpensive solution for adding an air > flow monitor to older fume hoods? Is it now law that every > fume hood (old and new) have one? > > Thanks >
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