LEGO Lightsaber Gel Pen Multipack [Discontinued] _RPI_ARC_KIT According to the fact sheet

According to the fact sheet it can detect Alcohols

The signal pads on the bottom are labeled DI for data input

1x PaPiRus HAT

IP Level: IP67

this board is perfect for use with CircuitPython or Arduino with low-cost WiFi

LEGO Lightsaber Gel Pen Multipack [Discontinued] _RPI_ARC_KIT According to the fact sheetMay the Force be with all Star Wars fans who write and draw with this LEGO Lightsaber Gel Pen Multipack! The set includes red, blue, purple and green pens that look like lightsabers simply choose your weapon, pull off the lightsaber handle lid and begin your creative mission! Epic gifting! LEGO and the maker geek scene go hand in hand, so we just had to get them in! Check out the rest of our LEGO selection here. Features Lightsaber Gel Pens in 4