supply of digital hand held anemometerdigital hand held anemometer,digital hand held anemometer (inclusive battery) with fast accurate readings, digital display and the convenience of a remote sensor separately. multi-functions for air flow measurement: m/s, km/h, ft/ min, knots. low friction ball-bearing design with accuracy at both high and low velocities. conventional twis ted vane arms, data hold. compact housing cabinet. used for check the air velocity of sg/lhb type ac co aches air conditioning & heating systems. the supplier shall furnish calibration certificate and warranty cert ificate during supply of the material. [ warranty period: 30 months after the date of delivery ] ]