Heart-Shape Fermentation Thermometer Sticker 18–32°C

Monitor Your Fermentation at a Glance

Never guess your fermentation temperature again! This clever heart-shaped fermentation thermometer sticker attaches directly to the outside of your glass jar, giving you an instant, easy-to-read temperature display — no batteries, no calibration required. Whether you're crafting sourdough bread, kombucha, kefir, or any other fermented food or beverage, keeping temperatures in the ideal range is the key to consistent, delicious results.

The adhesive patch uses liquid crystal technology to clearly indicate the jar's surface temperature from 18°C to 32°C (64°F to 89.6°F) — the sweet spot for most home fermentation projects. Its charming heart shape makes it a fun and functional addition to your fermentation setup.

Made in Mainland China.

Key Features

• 🌡️ Temperature Range: 18°C – 32°C (64°F – 89.6°F) — ideal for sourdough, kombucha, yogurt, and more
• ❤️ Heart-Shaped Design: Attractive and easy to spot on any jar
• 🏺 Adhesive Backing: Sticks securely to glass fermentation jars without tools
• ⚡ No Batteries Needed: Liquid crystal technology reacts instantly to temperature changes
• 🔄 Reusable: Designed for long-term use on your favourite fermentation vessels
• 📦 Pack of 1 — simple, clean addition to your fermentation toolkit

Perfect For

• Sourdough starter and acid bread fermentation jars
• Kombucha brewing vessels
• Kefir, yogurt, and cultured dairy jars
• Vegetable lacto-fermentation crocks
• Home brewers and fermentation enthusiasts

How to Use

1. Clean and dry the outside surface of your glass jar.
2. Peel the backing from the thermometer sticker.
3. Press firmly onto the jar at a convenient, visible height.
4. Read the colour-change display to monitor your fermentation temperature in real time.

Explore More From Our Kitchen Collection

Pair this thermometer sticker with other kitchen essentials:

• "All Carb Diet" Funny Quote Canvas Wall Art Print | Home Decor — a fun addition to any baker's kitchen
• "Best Seat In The House" Retro Quote Canvas Wall Art Print — brighten up your kitchen space

Learn More About Safe Fermentation

For best practices on home fermentation food safety, visit the FDA's Safe Food Handling Guide.

Frequently Asked Questions

Q: What temperature range does this fermentation thermometer sticker cover?

A: This thermometer sticker displays temperatures from 18°C to 32°C (64°F to 89.6°F), which covers the ideal range for most home fermentation projects including sourdough bread starters, kombucha, kefir, and cultured vegetables.

Q: Will this sticker work on any glass jar?

A: Yes! The adhesive backing is designed to stick firmly to the smooth outer surface of standard glass fermentation jars. For best adhesion, make sure the jar surface is clean and dry before applying the sticker.

Q: Does this thermometer sticker require batteries or calibration?

A: No batteries or calibration needed. The sticker uses liquid crystal technology that reacts automatically to temperature changes on the jar's surface, giving you an instant colour-change reading with zero setup.

Q: Is this thermometer sticker reusable?

A: Yes, it is designed for long-term, reusable application. Simply press it onto your glass jar and it will continue accurately displaying temperature readings over repeated fermentation cycles.