Thermapen® ONE
SKU:
THS-235-457
With full readings in ONE second or less, Thermapen ONE approaches the speed of thought - allowing you to focus exclusively on the quality of your work. Achieve such speed and accuracy without sacrificing durability and usability.
Sale Price:
$109.00
In Stock
Order Now
The Fastest: Full readings in ONE second or Less
The Most Accurate: ±0.5°F (±0.3°C)
The Most Reliable: Designed for the commercial kitchen
As Seen On
“The most accurate and best instant-read thermometer on the market today is, hands down, the ThermoWorks Thermapen ONE. It is consistently accurate to half of a degree Fahrenheit. It offers a temperature reading in one solitary second, quicker than you can even say the word temperature.”
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ONE. Second. Readings.
Thermapen ONE almost moves at the speed of thought...allowing you to focus exclusively on the quality of your work.
More Accurate
With an improved accuracy spec of ± 0.5°F (± 0.3°C), you’ll know your lightning fast Thermapen ONE readings are always accurate, as well.
Brighter Backlight
The automatic backlight is brighter and the light sensor is more sensitive to changes in ambient lighting conditions.
5-Year Warranty
The newly designed rugged, waterproof case features a 5-year warranty against defects.
With a newly designed battery compartment for easier access to the user settings and all the amazing features you love—auto-rotating display, motion-sensing sleep and wake mode, waterproof to IP67, NIST-traceable calibration certificate—you'll need to get ONE for yourself to understand the power of sub-second performance.
Download Thermapen ONE Operating Instructions
2,660 Ratings
18 Customer Photos
1-10 of 2,660 Reviews
Rated 5 out of 5
Jul 13, 2025
Thermapen One - Reliable, convenient and Accurate.
My Thermapen One has worked great for years. It is extremely reliable and extremely accurate. It's a real workhorse. I just purchased another one for my cousin as a thank you gift. I had cheap ones in the past but they never lasted and the Thermapen does.
Rated 4 out of 5
Jul 13, 2025
Easy to use, great design
Rated 5 out of 5
Jul 12, 2025
Field Specialists preferred thermometer
Most reliable thermometer in North America.
Rated 1 out of 5
Jul 12, 2025
Glitchy and Unreliable
For as much as this costs, it shouldn't have nearly as many problems as it does. We've had it replaced under warranty once and now not even a year later the replacement is having the same problem. We bought the boot to help protect it because customer service said that could help with the longevity of the product and it did nothing to help. It is very annoying to pull the thermometer out of the drawer just to find out it won't come on. Even with a fresh battery, if it does decide to come on the display is missing part of the numbers. Plan to need a new one every year and at this price, that's crazy.
Rated 5 out of 5
Jul 11, 2025
Great purchase!
Love this thermometer! I also got the silicone case and it's great. I love that the thermometer has a magnet so it can easily hook to the fridge. I got this after buying several cheaper thermometers from other brands that kept breaking. My mom has had her thermoworks thermometer for years. It's more expensive but definitely worth the price.
Rated 5 out of 5
Jul 11, 2025
great product. Reads fast and easy!
Rated 5 out of 5
Jul 11, 2025
Instant temperature readings for perfect results. No more guessing, get the temperature perfect every time. Instantly. Great product.
Rated 5 out of 5
Jul 10, 2025
I love it! It's everything I hoped it would be; just wish I'd bought it sooner.
Rated 5 out of 5
Jul 10, 2025
Great gift
I have always used this and bought one for my daughter boyfriend
Rated 5 out of 5
Jul 10, 2025
Great gift
I have always used these and bought one for my daughter boyfriend
Have a question? Ask owners.
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Why did you choose this?
What are the differences between the "classic" and the "ONE" thermapens?
Thermapen ONE is better than a Classic Thermapen is in many significant ways, the most important being its ability to read temperatures 3 times faster and 30% more accurately than a Classic Thermapen does.
Thermapen ONE was redesigned so it's more comfortable to hold, the battery compartment is much easier to access, and the settings are easier to change. We have such confidence in Thermapen ONE's durability that we have increased its warranty period to 5 years versus Classic Thermapen's 2 years.
Other important Thermapen ONE advantages include:
• If its probe is open, a Thermapen ONE's display automatically wakes up whenever you touch it. When a Classic Thermapen goes to sleep, you must close its probe and reopen it to turn it back on.
• A Thermapen ONE uses 1-AAA battery; a Classic Thermapen uses 2-CR2032 batteries.
• A Thermapen ONE's display automatically rotates so you can read it from any direction; a Classic Thermapen's display does not rotate.
• A Thermapen ONE has a backlight; a Classic Thermapen does not.
• A Thermapen ONE is waterproof to IP67; a Classic Thermapen is splash-proof.
Both Thermapen models come with a NIST-traceable Calibration Certificate.
Is this the best thermometer for candy making, syrups and chocolates?
My husband bought this thermometer a few years back for meats/grilling and smoking. We're getting one for each of our 4 kids for Christmas next year....my yearly candy making for the holidays; near perfection! Peanut brittle, caramels, toffee....no more guess work. Highly recommend -spend the money.
would ideally like one for all purposes if that's possible. When deep frying need constant check of temp. would really like it to clip on or something instead of having to hold it all the time. what do you recommend?
The Thermapen ONE is excellent for taking fast temperature readings, but for monitoring your frying oil temperature, we recommended using a leave-in probe thermometer, like the ChefAlarm, Smoke or any of our other alarm thermometers. A leave-in probe thermometer would be a separate unit, but it would prevent leaving the body of an instant-read thermometer close to a heat source over an extended period. You can find our cooking alarms here:
https://www.thermoworks.com/shop/products/cooking-alarms/
Can the Thermapen ONE be used for bread baking as well as meat?
Yes, it sure can!
How far should the Thermapen be inserted into meat?
Because the sensor is on the very tip of the probe, you only need to insert the probe to the thermal center (the coolest area) of the meat.
Here are some blog articles that demonstrate this principle:
https://blog.thermoworks.com/2016/06/how-to-temp-a-steak/
https://blog.thermoworks.com/2016/10/accurate-probe-placement-in-turkeys/
does the Thermapen ONE work well with rechargeable (NiMH) batteries which typically provide 1.3V, or does it require the 1.5V supplied by a disposable battery?
Im using a NiMH battery and its working just fine, but I've just ordered a set of Lithium AAA batteries which are 1.5v, just like Alkaline batts BUT will last a lot longer than Alkaline and Lithium will not corrode and leak like Alkaline batteries will. It's a Win, win.
Where is this product manufactured? Thank you.
It is manufactured in the United Kingdom. (England)
what is the warranty terms?
The Thermapen ONE carries a five-year warranty and guarantee against defects in either components or workmanship. During this period, products that prove to be defective will, at the discretion of ThermoWorks, be either repaired or replaced, without charge. The Thermapen ONE warranty and guarantee does not cover damage caused by fair wear and tear, abnormal storage conditions, incorrect use, accidental misuse, abuse, neglect, misapplication or modification, or use with non-ThermoWorks hardware/software. No warranty of fitness for a particular purpose is offered and the user assumes the entire risk of using the product.
Any liability by ThermoWorks is limited only to the replacement of defective materials or workmanship, and ThermoWorks accepts no responsibility for consequential loss. In line with our policy of continuous development, we reserve the right to amend our product specifications without prior notice.
This warranty is valid only if the product is purchased from ThermoWorks directly or from an authorized reseller. If you purchase a ThermoWorks product from an unauthorized reseller, you will not receive warranty or technical support.
https://www.thermoworks.com/product-warranty
What is the diameter of the probe?
The Thermapen's probe diameter (both models) is 3.30 mm and reduces to 1.8 mm at the tip.
How does the ONE do while checking temp on a brisket?
Because it is an instant-read thermometer, the Thermapen ONE is great for spot-checking the temperatures of meat, including brisket, particularly at the end of the cook. If you want to continuously monitor temperatures during the entire cook, we would recommend a leave-in alarm thermometer such as DOT, Smoke, Signals, Smoke X, ChefAlarm, or ThermaQ 2.
Good reviews and reputation
Americas Test Kitchen recommends it!
Cook's Illustrated review
Instant read