Heschen M12 Inductive Proximity Sensor Switch, Non-shield Type, LJ12A3-4-Z/BX, Detector 4mm, 10-30VDC 200mA, NPN Normally Open(NO), 3 Wire (2)

Product as described. Works very well with good sensing range and tested at both 12v and 24v DC operation.

Bought one of these to use as a sensor on my 3D printer. I have read a lot about inductive sensors needing 12v supply and needing voltage dividers to use on your printer without frying the chip so before doing any of that i powered this via a 5v USB supply, took measurements with a multimeter (Photos attached). I was getting 5.14v as supply, the sensor was reading 4.5v in the untriggred state (0.6v drop from diode/transistor switch is expected) and drops to 0v in the triggered state. Took some measurements of trigger distances and was getting a solid and repeatable 4mm with steel and about 2mm with aluminium (again exected given the lower inductive properties of aluminium). So this will work nicely as a 3d printer sensor, but you have to bear in mind the distances, if you are using an aluminium heat bed with a glass plate, then you aren't going to be able to get close enough to the bed to get a trigger, steel sheet on a magnetic bed won't be an issue. If you have something like painters tape on top of the alu bed, it should work as you should be able to get close enough but i haven't tested. Overall though it's a decent sensor, seems happy enough at 5v

Plugged this straight into the endstop pin on my Ramps board, seems to power up fine and detects my aluminium heated bed at about 4mm. Since it's powered by 5v there was no need for a voltager divider/level shifter, which is handy.

I used this to create a bed level sensor for my 3D printer and it works extremely well. Certainly better than any of the 18mm ones I purchased previously. You’ll need a 5v BEC to convert the signal from 12v to 5v, but that’s all.

Inexpensive and fast delivery works exactly as it should

You send me an NO but it’s a NC

Great precision, small and easy to mount. Works well on 3d printer using thin spring steel bed

The Sensor will only detect metal from a couple of mm away. It will not work if you are using a glass bed with your 3D printer. Other than that it will work as advertised

Muy bueno y fiable

Fits my four wheeler great and works as it should

Der Heschen Induktive Näherungsschalter LJ12A3-4-Z/BX ist eine hervorragende Wahl für den Einsatz in 3D-Druckern. Mit einer Detektionsreichweite von 4 mm und einem stabilen Betrieb bei 10-30V DC sorgt er für präzise und zuverlässige Funktionalität. Der NPN-Typ (normalerweise offen) ist ideal für die meisten Anwendungen, und die einfache Verkabelung mit 3 Drähten erleichtert die Installation. Er arbeitet zuverlässig und schnell, was ihn perfekt für die Endschalterfunktion in meinem 3D-Drucker macht. Ein tolles Produkt für präzise Druckergebnisse zu einem fairen Preis!

Finalmente, dopo numerosi sensori provati, questo è quello che cercavo! Premetto che mi è servito per fare l’autolevel del piatto di stampa su una stampante autocostruita di tipo corexy montante come scheda una mks sbase. La gioia di questo sensore é che lavora anche con la 5v della scheda (in descrizione c’e Scritto che funziona con 6v minimi, ero scettico anche io, ma ho constatato che funziona anche con i 5v), in questo modo può essere montato direttamente nel connettore dello zmin senza bisogno di andare ad alimentarlo con la 12/24v dell’alimentatore per poi dovergli montare una resistenza come invece ho dovuto fare con gli altri. Il sensore è un normalmente chiuso e rileva a circa 5-6 mm dal piatto (non ho testato con base in vetro), utilizza i classici 3 cavetti presenti sulla maggior parte dei sensori di questo tipo: V/marrone G/blu S/nero Non ha terminali quindi bisognerà applicargli un connettore per collegarlo alla scheda. Per quanto mi riguarda, se utilizzato su stampante 3D, questo risulta un’ottima scelta.

EXCELENTE, TRABAJA PERFECTO