Mini 20mm Dial Thermometer Waterproof | -20°C to 50°C

Portable Mini Circular Dial Thermometer – Compact, Accurate & Waterproof

Stay on top of temperature readings anywhere with this Portable Mini Circular Dial Thermometer. Measuring just 20mm in diameter, this lightweight plastic thermometer delivers reliable readings across a -20°C to 50°C (-4°F to 122°F) range — making it ideal for home, office, aquariums, terrariums, greenhouses, and more. Its waterproof design ensures durability in humid or wet environments, while the clear dial scale makes readings quick and effortless at a glance.

Key Features

• Compact 20mm Size: Ultra-portable and easy to mount or place in tight spaces.
• Waterproof Construction: Durable plastic body resists moisture for reliable long-term use.
• Wide Measurement Range: Accurately reads from -20°C to 50°C (-4°F to 122°F).
• High-Accuracy Dial Scale: Clear, easy-to-read circular dial for instant temperature monitoring.
• Versatile Use: Perfect for offices, aquariums, greenhouses, reptile terrariums, wine cellars, and more.
• Lightweight Plastic Body: Black finish, sleek and unobtrusive in any setting.
• No Batteries Required: Purely mechanical — always ready, no power source needed.

Specifications

• Material: Plastic
• Color: Black
• Dial Diameter: 20mm (approx. 0.08 in)
• Measuring Range: -20°C to 50°C
• Thermometer Type: Dial (Analog)
• Country of Origin: Made in Mainland China

What's in the Box?

• 1 × Circular Mini Dial Thermometer

Please Note

Due to manual measurement, there may be a slight size variance of 1–2 cm. Colors may appear slightly different depending on your monitor settings.

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Authoritative Reference

For guidance on proper temperature monitoring in various environments, visit the NIST Temperature Measurement Calibration resources — the national standard for measurement accuracy in the USA.

Learn more: Thermometer

Frequently Asked Questions

Q: What is the measuring range of this mini dial thermometer?

A: This portable circular dial thermometer measures temperatures from -20°C to 50°C (-4°F to 122°F), making it suitable for a wide range of indoor environments including offices, aquariums, greenhouses, and terrariums.

Q: Is this thermometer waterproof?

A: Yes, the mini circular dial thermometer features a waterproof plastic body, making it durable and reliable even in humid or wet conditions such as aquariums, greenhouses, or bathrooms.

Q: Does this thermometer require batteries?

A: No — this is a fully mechanical analog dial thermometer that requires no batteries or power source. It's always ready to use right out of the box.

Q: How big is this thermometer?

A: The dial diameter is 20mm (approximately 0.79 inches), making it one of the most compact thermometers available — perfect for tight spaces or discreet placement.