# Proximity Sensor specification

**URL:** <https://forum.snapmaker.com/t/proximity-sensor-specification/6741>\
**Category:** Snapmaker 2.0 (3-in-1)\
**Created:** [May 17, 2020, 7:34pm UTC](https://forum.snapmaker.com/t/proximity-sensor-specification/6741 "2020-05-17T19:34:48Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Waldo](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/waldo/32/1704_2.png) [@Waldo](https://forum.snapmaker.com/u/Waldo)\
**Post date:** [May 17, 2020, 7:34pm UTC](https://forum.snapmaker.com/t/proximity-sensor-specification/6741/1 "2020-05-17T19:34:48Z")

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I’m looking for the specifications of the proximity sensor? I want to replace my magnetic print sheet with a 3mm aluminum (covered with kapton). Does the proximity sensor measure something in the Heated bed or does is use an infrared or laser measurement?

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**Author:** ![DroneOn](https://avatars.discourse-cdn.com/v4/letter/d/bc8723/32.png) [@DroneOn](https://forum.snapmaker.com/u/DroneOn)\
**Post date:** [May 17, 2020, 9:22pm UTC](https://forum.snapmaker.com/t/proximity-sensor-specification/6741/2 "2020-05-17T21:22:15Z")

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It is an Inductive type and senses the metal print sheet.

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**Author:** ![Waldo](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/waldo/32/1704_2.png) [@Waldo](https://forum.snapmaker.com/u/Waldo)\
**Post date:** [May 17, 2020, 9:27pm UTC](https://forum.snapmaker.com/t/proximity-sensor-specification/6741/3 "2020-05-17T21:27:25Z")

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Thank you Steve. Do you perhaps have details on it? Will it detect Aluminium?  
This is part of the part number…[https://scontent.xx.fbcdn.net/v/t1.0-0/p160x160/98353691\_10159795829669606\_4735959093250883584\_n.jpg?\_nc\_cat=102&\_nc\_sid=dbeb18&\_nc\_ohc=mqaw0GwJjboAX\_T4E9w&\_nc\_ad=z-m&\_nc\_cid=0&\_nc\_zor=9&\_nc\_ht=scontent.xx&\_nc\_tp=6&oh=e6c6eb9434e23b7344b3ac9438f94cd2&oe=5EE5C207](https://scontent.xx.fbcdn.net/v/t1.0-0/p160x160/98353691_10159795829669606_4735959093250883584_n.jpg?_nc_cat=102&_nc_sid=dbeb18&_nc_ohc=mqaw0GwJjboAX_T4E9w&_nc_ad=z-m&_nc_cid=0&_nc_zor=9&_nc_ht=scontent.xx&_nc_tp=6&oh=e6c6eb9434e23b7344b3ac9438f94cd2&oe=5EE5C207)

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**Author:** ![DroneOn](https://avatars.discourse-cdn.com/v4/letter/d/bc8723/32.png) [@DroneOn](https://forum.snapmaker.com/u/DroneOn)\
**Post date:** [May 17, 2020, 10:37pm UTC](https://forum.snapmaker.com/t/proximity-sensor-specification/6741/4 "2020-05-17T22:37:53Z")

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I searched a month ago for the part number but came up empty. I can tell you it appears to be a 24v NPN type proximity sensor with a 2mm sensing range. 3-wire connector with Gnd, sig and 24v and the signal wire is pulled low (~0.6v) when the sensor is triggered. ![20200517_184145](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/2X/8/89334aada3ee560941495b73bd8ddff4299a50fc.jpeg)

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**Author:** ![Waldo](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/waldo/32/1704_2.png) [@Waldo](https://forum.snapmaker.com/u/Waldo)\
**Post date:** [May 18, 2020, 7:41am UTC](https://forum.snapmaker.com/t/proximity-sensor-specification/6741/5 "2020-05-18T07:41:56Z")

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Dear @Edwin  
Do you perhaps have specifications on the Proximity Sensor? I want to establish what the range is and if it will detect aluminium?  
Regards  
Waldo