Original Prusa i3 MK3 to MK3S Filament Sensor Upgrade Kit


Item Description:

This is a high quality clone of the newly released Prusa MK3S optical filament sensor. The previous sensor did not work well with some specific filaments or even detect filament jams. The new sensor is using the optical sensor which is triggered by a simple mechanical lever. This sensor doesn’t care about the optical properties of the filament (it can be completely invisible) and cannot die because of mechanical wear.

An installation guide can be found on the Prusa website for the MK3S upgrade kit.


Key Features:

  • Suitable For The Prusa i3 MK3 & MK3S
  • High Quality

Product Details:

  • 1 x Filament Sensor
  • 1 x Cable
  • 1 x M3x18 Screw
  • 1 x M3x10 Screw
  • 1 x M2x8 Screw
  • 2 x M3nS Nut
  • 2 x M3n Nut
  • 1 x Steel Ball
  • 1 x Magnet 10x6x2
  • 1 x Magnet 20x6x2

Shipping & Handling:

I aim to get your items packed and posted within 24 hours of receipt of your order, this is usually much less if you have not ordered at the weekend or on a public holiday. Once your items have been posted I am unable to influence how quickly your package is delivered if you are in a hurry use one of the tracked express shipping options when checking out. If you opted for a tracked shipping service your tracking information will be automatically uploaded as soon as the item has been shipped.

Most customers will receive their orders within couple of days, please note I use economy shipping services however the service is not guaranteed to arrive within this time frame.


Service Promise:

My aim is to provide excellent service to all customers. If you have any questions please do make contact. Most issues can be addressed quickly and easily. I look forward to you shopping with me!


Return Policy:

If you are not entirely satisfied with your purchase, I am here to help. All returns are accepted within 30 days from the date you received the item, return shipping cost to be paid by the buyer. Once the returned item is received a refund via your original method of payment will be made. The buyer is responsible for return shipping on any item that is not damaged or faulty.