A classic in the United States. A small, lightweight, and phosphorescent thermometer that allows you to know the temperature when you are in complete darkness.

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Phosphorescent Thermometer

The LumaZip phosphorescent thermometer is made in Colorado by Sun Company. They manufacture thermometers, altimeters, and a wide range of outdoor accessories. LumaZip is one of their most popular and affordable models.

When to Use It

Having a thermometer at hand while walking helps prevent heatstroke or situations arising from low temperatures, such as hypothermia.

It’s also useful for gathering information and checking the performance of certain items like your sleeping bag or thermal insulation jacket. Knowing their limits helps better plan future routes.

termómetro fosforescente

Photo by @hiiragi.outfitters


Unlike the Brrr-ometer thermometer, LumaZip is phosphorescent. This means it glows in the dark, making it easier to find while sleeping. You also don’t need to turn on a headlamp or phone to check the temperature at that moment.

On the back, it has a handy chart to calculate wind chill based on wind speed. It also features a ring that you can attach to any zipper on your backpack, clothing, or tent.

Made of Phosphorescent Material

What’s interesting about this model is that it’s made of phosphorescent material that can glow for up to 6 hours after being exposed to light.


  • Temperature range from 50°C to -30°C.
  • Dimensions 5.1 x 2.9 cm.
  • Weight 8gr.

Reviews and Ratings

  1. Alberto Garrido  

    cumple su función tal como dice la descripcion, yo lo tengo colgado de un gancho de la tienda y va bien para saber a media noche en que temperatura estas, lo que queria

  2. Cristina   (verified owner)

    Es perfecto, no pesa nada y es muy útil que brille en la oscuridad.

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