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Wireless Bluetooth 4.0 BLE IR Infrared 940nm Optical Probe IEC65056-21 IEC1107 Dlms Standard Photoelectric Sensor Optical Head, Find Details and Price about IR Infrared 940nm Optical Probe from Wireless Bluetooth 4.0 BLE IR Infrared 940nm Optical Probe IEC65056-21 IEC1107 Dlms Standard Photoelectric Sensor Optical Head - Jiaxing Mingyuan Electronics Co., Ltd.