Ideal for low air velocity and volume measurement the slim plug in telescopic hot wire probe extends from 026 to 12m inc handle has a probe sensor head 85mm and is ideal for grille hoods and diffusers excellent for ventilation surveys air conditioning clean rooms flow hoods air balancing and environmental monitoring temp range 0 to 50c 32 to 122f accuracy 1c18f power 1 x 9v pp3 alkaline battery or acdc power adaptor supplied dimensions 185 x 66 x 33mm unit 026