Dolphin Automation manufactures Diffuse Scan in Photoelectric Switch. Dolphin Automation is an ISO 9001:2008 certified company. Dolphin Automation offers Proximity Switches, Photo Switches, Capacitive Switches, Mark Sensors, Solid State Relay, Counter / Rate/Temperature / Humidity Process Indicator, Timer and Load Cell Controller. In the Diffuse Scan, the transmitter and receiver are in the same housing. The IR beam emitted by the transmitter is received by the receiver and an output pulse is achieved.