Can these be autoclaved?

I would have to assume so. They’re scientific instruments. Generally, with a few exceptions, there designed to be regularly sterilized. I regularly send mine through a pressure cooker at 15 PSI in liquid cultures

Could these be used with a sensor for an alarm system (Simplisafe)? I have double hung windows so need a slim magnet to put opposite the sensor. Thx

Probably, but I suspect it would be much easier to use one of these that's the size you want: https://www.amazon.com/s?k=neodymium+disc+magnets&crid=3RBE9SKKGYW9W&sprefix=Neodyn%2Caps%2C235&ref=nb_sb_ss_ts-doa-p_5_6

is there any possibilities that these could degrade and leak into the water? any easy way to see it? thanks

There is nothing to leak. Inside is a solid magnet. It's possible that after using them a long time, friction could wear out the plastic coating, but that will probably take years and you'll see it slowly degrading. Just take a quick glance before you use them and if they look like they are in good condition, they are.

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⚡ Stir up innovation with flawless precision!

CLEAN RELIABLE - Non-porous PTFE surface prevents contamination, ensuring pure, consistent mixing results.
VERSATILE 16 PACK - Ample supply of 30mm stir bars to keep your experiments running without pause or downtime.
LAB GRADE DURABILITY - Engineered with premium PTFE and magnetic steel for unmatched resistance to heat, corrosion, and wear.
UNIVERSAL COMPATIBILITY - Seamlessly pairs with all magnetic and heating stirrers across scientific, industrial, and academic labs.
PRECISION MIXING EVERY TIME - Cylindrical, burr-free design ensures smooth, stable rotation—no speed deviation, no interruptions.

This 16-piece set of 30mm PTFE magnetic stir bars combines high-temperature resistance, corrosion-proof materials, and smooth rotation for reliable, contamination-free mixing. Ideal for scientific research, industrial labs, and academic settings, these stir bars deliver consistent performance and universal compatibility with all magnetic stirrers.

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Brand	Weewooday
Manufacturer	Weewooday
Model number	Weewooday-PTFE Magnetic Stirrer-01
Number of Memory Sticks	1
Item Weight	100 g
Product Dimensions	11 x 11 x 1.6 cm; 100 g
Item model number	Weewooday-PTFE Magnetic Stirrer-01
Item Height	0.63 Inches
Item Width	4.33 Inches
Are batteries included?	No

PTFE Magnetic Stirrer Mixer Stir Bar, White Color, Stir Rod Magnetic, Laboratory Bar, Stir Plate Bar, Stir Plate Magnet Stick (16 Pieces,30 mm/ 1.18 Inch)

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