Weld Detector

we are offering weld detector. weld detector consists of transmitter and receiver two parts, sheet metal from the transmitters and receivers, passing through the middle transmitters emit a beam of banded by the modulation infrared, near weld holes not by then, the beams are steel plate cover, can't reach the receiver, the weld seam when they arrive, the light through the holes near weld received by receiver, and through the subsequent processing circuit, a switch quantity output signal.