Tender For infrared anti-collision device having one emitter module & one reflector to avoid collision of 2cranes with the following specification: (1) working principle - retro reflective infrared waves. (2) supply voltage: 110/230v ac (3) sensitivity adjustment 25-100% (4) output contact rating: 5 amps (5) max distance of sensing: 3-10 mtrs. similar to model no. acd-501 of speed-o-control. [ warranty period: 30 months after the date of delivery ] ]