Description Specifications Description The Alnor® AirGard® Lab Hood Monitor Model 405-D indicates safe levels of air flow in laboratory fume hoods. It is used to measure and report on exhaust flow in many critical or controlled indoor environments, including pharmaceutical and university laboratories. The AirGard 405 Monitors is a simple, low-cost option for your monitoring requirements. It features an audible and visual alarm with relay output in an easy-to-calibrate unit . This surface-mounted model is designed for easy retrofit to existing hoods. Features and Benefits Measurement Range is 70-250 fpm (0.35-1.27 m/s) Measurement Accuracy 5% of reading Surface mounting Audible and Visual Alarm Integral Thermal Sensor Power 24VDC (Plug-In Wall transformer Included in US) State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Product Specifications Alarm Range:70-250 fpm (0.35-1.25 m/s ) Field set-up:Single low velocity alarm set point Alarm set points:LowRepeatability of alarm set point:±10% of reading or 10 fpm (0.05 m/s), whichever is greater Alarm delays:10 seconds Relay output:1 Literature & Docs Accessories