Atp hot wire usb logging thermo anemometer avm 8880 atp avm 8880 p this atp hot wire usb logging thermo anemometer is ideal for low air velocity and volume measurement the slim plug in telescopic hot wire probe extends from 0 3 to 1m including handle and has a probe sensor head 9mm diameter the atp avm 8880 is ideal for many applications these include grill hoods and diffusers as well as for ventilation surveys air conditioning clean rooms flow hoods air balancing and environment