Help with Inductive Sensor NPN TL-W5MC1

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Help with Inductive Sensor NPN TL-W5MC1

Post by vitalibr » Wed Feb 05, 2020 6:29 pm

I bought some units of the TL-W5MC1 to use with my Raspberry Pi CNC Board.


1.Product Name:Proximity Switch
2.Type:DC 3-wire NPN NO
3.Theory:Inductance Sensor
4.Output:Switching Transducer
5.Sensing Distance:5mm±10%
6.Sensing Object:Metal
7.Sensing Object:Iron 18x18x1mm
8.Rated Voltage:DC 6-36V
9.Rated Current:200mA

As my gantry is made of aluminum, I did some tests and saw that it detects between 2 ~ 3mm instead of 5mm when the material is iron.

If I use 12v or 24v the distance is a little longer than 6v for example. So I would like to use them with 24v, but the black cable responsible for the signal will burn (if not in hours, it will be in days/months) my rpi hat.

How do I do to be able to connect the sensor to the pins of the limit switches?

Bertus Kruger
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Re: Help with Inductive Sensor NPN TL-W5MC1

Post by Bertus Kruger » Tue Feb 11, 2020 6:38 pm

We have not tried those, but suggest using normal micro switches. The kind that has a long metal lever that can flex a bit.

Reason I suggest this is because if the machine is going at full speed its likely that it will not stop in 2-3mm and might over run your end stop.

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