Dolphin Automation manufactures Single Phase Solid State Relay. 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. The Single Phase Solid State Relay does not have any moving contact. All switching is done by solid state components making the work absolutely noiseless, surge free and with faster switching capability.