WIRELESS SENSOR AND RAISING/LOWERING DEVICE INFORMATION COLLECTION SYSTEM

A wireless sensor and a raising/lowering device information collection system that can suppress an increase in an amount of wiring are provided. The raising/lowering device information collection system includes the wireless sensor that operates by power obtained from a safety circuit when a first contact included in the safety circuit in which a plurality of contacts are connected in series is open in a raising/lowering device, and transmits a radio wave indicating an electrical signal indicating a condition of a voltage of a first contact during operation, and a gateway device that creates information on the first contact based on the radio wave received from the wireless sensor and transmits the information on the first contact to a remote communication device.