E3SAD88 is part of Omron's E3S series of photoelectric sensors. It is a 4-way, object-detecting photoelectric switch that can be used to detect objects in a variety of applications. The E3SAD88 is an analog output switch, meaning its output can be easily read by a computer or other device. It can detect objects up to 300 millimeters away and has an operating temperature range of -25 to +55 °C. It is also IP65 rated, meaning it is protected from dust and water spray.