These are Parker
SPST Reed Switch Proximity Sensors
Part Number 1446050100
- 4mm Sensing
- 3 - 125 V Supply Voltage AC or DC
- 10 - 40mA Output
- Output Response Time: 1 milliseconds ON and OFF
- Contact Power 5 Watts
- LED Indicator
There were 5 pieces at the time of this listing. These are being sold individually.