This is a device capable of deteching the presence or the transit of a metallic mass on one or more wires located under the road surface used to detect the presence or passing of vehicle on the road.
» Supply voltage :220V 50~60Hz type of detector : differentiating wire loop.
» Operating voltage : 18 V
» Maximum current draw : 100 mA.
» Response sensitivity : L/L=0.02% duration of presence indication with 0.5% 
» inductance variation : about 30.
» Loop wire : insulated flexible copper wire 1.5 ~2.5 ~ 4 mm.sq.
» Lead in : insulated flexible copper wire : 2.8 mm.sq.