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Baomain Capacitance Proximity Sensor Switch LJC18A3-B-Z/BX NPN NO DC 10-30V 200mA 1-10mm

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$9.99

$ 4 .99 $4.99

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  • Product Name : Capacitive Proximity Switch;Model : LJC18A3-B-Z/BX;Wire Type : DC 3 Wire Type (Brown, Black, Blue);Switch Appearance Type : Cylinder Type
  • Theory : Capacitance Sensor;Output Type : NPN NO(Normal Open);Diameter of Head : 18mm;Detecting Distance : 1-10mm
  • Detecting Object : Metal or Nonmetal Material;Supply Voltage : DC 10-30V;Current Output : 200mA;Response Frequency : 100Hz
  • Operating Temperature : -25 to +65 Celsuis (Non-freezing Condition);Size : 7.5 x 3cm / 3"x 1.2"(L*Max. Dia);Cable Length : 120cm/47";External Material : Plastic, Alloy
  • Net Weight : 108g; Package Content : 1 x Capacitive Proximity Switch


  • It is a component widely used in automatic control industry for detecting, controlling, and noncontact switching.
  • When proximity switch is close to some target object, it will send out control signal.
  • As it is capacitive type proximity switch, its detecting object target is not limited to only conductor, but also liquid and even powder things, like plastic, water, glass, oil, etc.
  • It is widely used in machine, paper making, light industry for limiting station, orientation taking count, speeding trial ect.

Donna Kielbasa
2025-08-30 16:11:31
Worked perfectly as a replacement for CR10s Pro. Just needed to solder the wires to the existing connector
Ted Moyer
2025-08-23 18:59:13
Great proximity sensor for anet a8 factory. I have heated alluminum bed covered in painters tape and skynet firmware.
Chris
2025-08-16 21:06:19
We used this to detect whether or not an object was present, which it worked great for. Using the sensor itself to trigger a relay has worked well, but we have had 2 die in a couple years of use. Our environment is full of dust and vibrations though, so very tough on electronics. Worked great for prototyping, and we kept it in the product as it's cheap and easy to switch out if needed.
WAL
2025-07-14 17:10:32
Better quality than the last one I had. Works perfectly for bed leveling my Anet A6 with aluminum heat bed and glass. I powered mine of 12v and put a diode on the signal wire(black) for the Z.
firejackal
2025-06-21 16:12:12
This is an amazing proximity sensor, it can detect multiple types of objects and not just metal, which includes my finger, glass, and wood.Update: After a lot of testing, I cannot get this proximity sensor to accurately produce the same results each time using an Arduino to test it. How I have it wired up: Positive (brown) to 12v+ source (atx power supply), negative (blue) to ground, and signal (black) to a zener diode, then to the Arduino.It detects objects, but the distance it detects it at varies a lot. Let's say the initial distance is 1mm, the next time it might be 0.8mm, then the time after might be 1.4mm.Even using this on a 3d printer makes it's application even worse.Either I'm using it wrong with my wiring, and the sensor is just too unreliable for precise applications to detect glass.
Rick
2025-06-10 12:13:32
Works really good. The adjustment on it is very small. But, it does work.
James Hamilton
2025-06-01 10:32:04
It works to a certain resolution (.5mm or less), but it is no where near reliable enough for use with a 3d printer.
Francisco iglesias
2025-05-25 11:51:20
Perfecto
Brice Casimir Foka F
2025-05-17 10:03:48
👍👍
Anon
2025-04-28 17:44:48
The media could not be loaded.
Christian B.
2025-03-11 18:16:45
Alls good
Rick
2025-01-11 16:15:43
Worked well. Received next day as promised thanks
Kyle
2024-12-29 09:51:48
Update: after less the a week a use it has started to fire randomly for no apparent reason and is unusable. I will be trying to return it even though I had to cut the cable shorter for my printer.Extremely temperature sensitive. Accuracy varies by ~1mm/5C. Not recommended if you do not have a temperature regulated print chamber. But if you do it's adequate. Just make initial calibration a pain.