ThermoWorks ThermoDrop – Zipper-Pull Thermometer

The ThermoWorks ThermoDrop zipper-pull thermometer is a small digital thermometer for hiking, backpacking and nights under canvas. Clip it to your pack or jacket and check the temperature wherever you stop. At just 17 g including the battery and key ring, it adds very little weight to your kit. Wondering how cold it got overnight? ThermoDrop stores the minimum and maximum temperatures while it is switched on. The display turns automatically when you hold it upside down, and a quick press lights it up for a temperature check after dark. Simple, useful and easy to take along.

And yes, now you can provide a little proof for those long nights that were just a little below the limit temperature of your quilt and you have been shivering for hours. And also bragging rights that you survived crazy temperatures , haha! All jokes and fun aside, this little gadget can be pretty useful to test your gear before a big adventure and see where it’s limitations are. Super easy to use, the display flips it’s orientation when turned, a little backlight helps you read it in the dark. Long press shows max and minimum temperatures. The thermodrop is also a great present for all those ultralight backpackers, hikers and outdoor lovers.

A lightweight thermometer for the trail

• 17 g ready to carry: compact enough to leave attached to your pack.
• Minimum and maximum memory: check the temperature range during your trip.
• Backlit, rotating display: easy to read at camp, even in the dark.
• IP67 waterproof rating: ready for wet days outdoors.
• Celsius or Fahrenheit: choose the units you prefer.
• Long battery life: approximately 4,000 hours on a replaceable CR2025 battery.

ThermoDrop thermometer specifications

• Dimensions: 49 × 33 × 13 mm
• Weight: 17 g including battery and key ring
• Temperature range: −25 to 50 °C (−13 to 122 °F), according to the ThermoWorks information sheet
• Display: whole-degree readings, with automatic 180° rotation
• Backlight: switches off automatically after 10 seconds
• Battery: CR2025 3 V lithium coin cell
• Battery life: approximately 4,000 hours
• Water protection: IP67
• Included: ThermoDrop thermometer, battery, split key ring and instructions

How to use your ThermoDrop

How do I switch from Fahrenheit to Celsius?

Switch the thermometer off by holding the button for five seconds. Press and hold the button again when starting it up, keeping it held for five seconds until the unit changes from °F to °C.

How do I see the lowest overnight temperature?

Leave ThermoDrop switched on overnight. Hold the button for three seconds until MAX flashes, then press it again to see MIN. Switching the thermometer off clears the stored readings.

Can I read it in the dark?

Yes. A short press activates the backlight for ten seconds, so you can check the temperature without reaching for your headtorch.

For the button controls and battery replacement, see the ThermoWorks ThermoDrop instructions. Browse our lightweight outdoor electronics for more useful additions to your kit.