I can provide a large number of spare parts for old PCs. We have a lot of products and only show a small number of products on the website.
eBay
CLOWEIT M18 Transparent Glass Detection Photocell Diffuse Reflect Feedback Photoelectric Sensor Proximity Switch Motion Detector
Aliexpress UK
Inductive approach distance: 5 ~ 10mm. Six digit digital display, magnetic induction switch. Magnetic induction digital display counter, accurate counting, seismic design, no power connection. Counter 1.
eBay
Digital Tachometer RPM Speed Meter + Hall Proximity Switch Sensor NPN WITH Magnet For DC 12v Car Engine Motor Rotating Speed
Aliexpress UK
eBay
Speed Measuring Instrument 4 Digital DC8-24V LED Tachometer Gauge RPM Speed Meter + Hall Proximity Switch Sensor NPN For Motor
Aliexpress UK
NEW Pepperl + Fuchs 41FY1 450046 Magnetic Proximity Sensor Switch STOCK H407A
eBay
4 Digital LED Blue Green Tachometer Gauge RPM Speed Meter+Hall Proximity Switch Sensor NPN 12V Accessories Tachomete Sets
Aliexpress UK
New and unused in the original bag as pictured. You can see all of the specs etc of this model on the Camozzi site here.
eBay
GPS-01 Reed Switch 4x18/5x25/6x20/25/30mm Normally Open Magnetron Proximity Sensor
Aliexpress UK
1 x Photoelectric Switch Tester. The sensor tester is designed to test two-, three- or four-wire DC sensors with PNP or NPN outputs. The tester is portable and can only use 2 6F22 9V batteries(Battery Not Included).
eBay
0.56'' Tachometer 4 Digital Green LED Tach RPM Speed Meter With Hall Proximity Switch Sensor NPN 24V 12V
Aliexpress UK
eBay
AC 220V 4 Digital LED RED Tachometer RPM Speed Meter+Hall Proximity Switch Sensor NPN
Aliexpress UK
Proximity sensors are made by molding and sealing a magnetic spring tube attached to the wire. Switching occurs when there is a magnetic object nearby. 2 Proximity switch. Maximum switching current: 0.5A.
eBay
Air Pneumatic Cylinder CS1-J Magnetic Reed Switch Sensor CS1-G CS1-M CS1-U CS1-F D-A93 D-Z73 D-A73 D-C73 switch solenoid valve
Aliexpress UK