Industry-Electronics 4duino Infrarot Lichtschranke Product Model: OKY3276 Correlation Photoelectric Sensor Price Infrared Radiation Count Module Infrared Sensor Product Description 1.Width of optical coupling slot: 10mm. 2.Main chip: LM393, Groove type optocoupler H2010. 3.Working Voltage : DC 5V. 4.Size: 27.6mm*20mm*17mm.