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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PTFE Magnetic Stirrer Mixer Stir Bar, White Color, Stir Rod Magnetic, Laboratory Bar, Stir Plate Bar, Stir Plate Magnet Stick (8 Pieces,30 mm/ 1.18 Inch)

Product ID: 439037617

Details

Brand
Weewooday
Manufacturer
Weewooday
Material
Number of Pieces
8
Shape
Cylindrical

🔥High-temp resistant up to 260°C

🧪Corrosion & abrasion-proof PTFE surface

⚙️Stable rotation with no deviation

Description

⚡ Stir Smarter, Not Harder — Elevate Your Lab Game!

UNIVERSAL COMPATIBILITY - Seamlessly pairs with all magnetic and heating stirrers for versatile use.
TRUSTED BY PROFESSIONALS WORLDWIDE - Highly rated with 4.7 stars and praised for reliability and prompt delivery.
BULK PACK FOR CONTINUOUS INNOVATION - 8-pack ensures you never run out during critical experiments or projects.
BUILT TO WITHSTAND EXTREME CONDITIONS - Resists high temperatures, corrosion, and abrasion—perfect for rigorous lab environments.
PRECISION ENGINEERED FOR LAB EXCELLENCE - Smooth cylindrical PTFE design minimizes friction for flawless stirring.

This 8-piece set of 30mm PTFE magnetic stir bars combines durable, corrosion-resistant materials with precision engineering to deliver stable, efficient stirring in high-temperature and demanding laboratory settings. Ideal for scientific research, industrial, and agricultural applications, these stir bars ensure smooth rotation and broad compatibility with various magnetic stirrers.

Specifications

ASIN	B08L3KXRCB
Brand Name	Weewooday
Customer Reviews	4.7 4.7 out of 5 stars (778)
Manufacturer	Weewooday
Manufacturer Part Number	Weewooday-PTFE Magnetic Stirrer-01
Material Type	Polytetrafluoroethylene
Model Number	Weewooday-PTFE Magnetic Stirrer-01
Number of Pieces	8
Shape	Cylindrical
Unit Count	1.0 Count

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