SMC Corporation ZSE1-T1-55L Vacuum Pressure Switch

SMC ZSE1-T1-55L is a compact vacuum pressure switch designed to monitor negative pressure in vacuum lines and actuate downstream equipment. It operates on 12 to 24 VDC and provides a PNP open-collector output, making it easy to interface with PLCs and relays without supplying a separate supply for the logic circuit. The device accepts a 1/8 in NPTF vacuum port for connection to the vacuum line and is rated for a vacuum range from 0 to -101 kPa, enabling reliable detection across typical industrial vacuum systems. A hardwired electrical connection is standard, with a 3 m lead length to suit typical machine layouts, reducing the need for extra wiring adapters. Designed as part of SMC’s ZSE1 family, this switch supports applications such as vacuum gripping, pick-and-place tooling, and suction cup systems where detecting a true vacuum level is critical for safe, repeatable operation. Its combination of compact form factor, voltage compatibility, and simple PNP switching makes it a straightforward choice for integrating vacuum sensing directly into automation circuits.