Thermapen® ONE by ThermoWorks

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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.

5-year Warranty NSF Certified Made in England Polygiene Biomaster

From the Blog

Backyard Cookouts—From Steaks to Chicken to Brats, You Need Fast Temps

Planning a cookout with friends and family? You need to be temping those steaks, brats and burgers! Avoid the dry-meat-cookout blues with the power of thermometry...

Spare Rib Temps: Barrel-cooked Glory

Outstanding taste and texture in spare ribs are not hard to master if you understand the basic principles of time and temperature during your cook.

Homemade Ice Cream: Temperatures for Smooth and Creamy Results

If you want a smooth, creamy ice cream—as opposed to a coarse, icy one—you need to take care with the ingredients and the temperatures.

Digital Instant-Read Thermometer: Winner

"Our former favorite instant-read thermometer, the ThermoWorks Thermapen Mk4, has been discontinued. We tested its replacement, the ThermoWorks Thermapen ONE, and found that we liked it even better than the old model. We highly recommend the ONE; it is our new winner."
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ThermoWorks Thermapen ONE Review

"We tend to get picky with the reviews here and can generally find something that, at least in our opinion, could be improved. We’re hard-pressed to do that for the Thermapen ONE; there’s simply nothing, from a functionality perspective, that we think could be improved."
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Thermapen One Review | Best BBQ thermometer

"This is the bestest, baddest thermometer you will ever get. It’s the best example of “buy once, cry once” in my entire BBQ journey. This may be the best thing I’ve ever bought…and the thing I’m most happy with...."
Watch the Review

"ThermoWorks Thermapen ONE is honestly the best instant read thermometer we've tested to date. So, if you like to have the best of the best, look no further and order ONE for yourself...."
Read the Review

ThermoWorks Thermapen ONE Review

Thermoworks Thermapen ONE is the newest addition to an excellent line-up of their instant-read thermometers. Its unmatched speed, accuracy, and feature set have raised the bar for cooking accessories.
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Specifications
Range	-58.0 to 572.0°F (-49.9 to 299.9°C)
Accuracy	±0.5°F (±0.3°C) from -4 to 248°F (-20 to 120°C) otherwise ±1.8°F (±1.0°C)
Resolution	Factory set to 1° (user reconfigurable to 0.1°)
Response Time	Full reading in 1 second (0.2 seconds time constant)*
Probe	4.3 L inches x 0.12" dia. (reduces to 0.06" dia.), High Performance Type K Thermocouple
Display	1 H x 1.54 W inches (25 H x 39 W mm) LCD, rotates 360°, Intelligent Backlight
Sleep Mode	10 to 180 seconds, user selectable (user reconfigurable to disable)
Water Resistance	IP67
Operating Range	–4 to 122°F (–20 to 50°C), max ambient limits of Thermapen body
Battery	1.5 volt AAA, 2,000 hours typical (without backlight)
Dimensions	6.1 W x 1.7 H x 0.74 D inches (156 W x 48 H x 19 D mm)
Weight	0.25 lbs (115g)
Warranty	5 years
Certificate	Includes NIST-traceable calibration certificate

* Response time defined as five time constants for 99.3% of actual temperature.

With full readings in just one second, Thermapen ONE is in a category by itself when it comes to “instant-read” thermometers. Thermapen ONE achieves a new standard of accuracy, as well—now accurate to ±0.5°F (±0.3°C)—so you know your readings are correct. To achieve this level of performance without resorting to algorithms or mathematical adjustments, Thermapen ONE truly pushes the boundaries of sensor and electronic measurement engineering.

New: Unparalleled speed with full temperature readings in less than one second
New: Industry leading accuracy to half a degree: ± 0.5°F (±0.3°C)
New: Brighter intelligent backlight display automatically illuminates in low-light and when the sensor window is covered
New: Easy access battery housing uses one common AAA battery for a 2,000-hour battery life
New: Five-year warranty
Motion-Sensing Sleep and Wake Mode: intuitively turns on and off—or when picked up or in use and off when set down to save battery
Patented 360° auto-rotating display uses accelerometer technology to intuitively turn right-side up
Shockproof, dustproof, and waterproof with an IP67 rating for water-tight seals
Foldaway design protects probe when not in use
Polygiene Biomaster Antimicrobial Silver Ion Technology reduces microbial growth
Hand washable
Display temperatures in °F or °C, 1° or 0.1° resolution
Each Thermapen ONE includes a NIST-traceable calibration certificate verifying accuracy to national standards

The new Thermapen ONE includes professional level features at an affordable price, including an auto-rotating display, which uses accelerometer technology to detect screen motion/orientation for use in either hand (similar to smartphone orientation); a battery-saving sleep/wake mode; fully waterproof IP67 design; new brighter automatic backlight for use at night or in low light; 2,000-hour battery life using one AAA battery with new easy-access battery housing; and included NIST-traceable calibration certificate for increased confidence in its performance. Thermapen ONE lets everyone “seek perfection” when cooking at home, in the BBQ pit, or for daily use in professional restaurants, to measuring critical temperatures in labs, food processing plants, grocery stores, and more.

Downloads

Download Thermapen ONE Operating Instructions

Download Thermapen ONE Calibration Trim Instructions

Download Thermapen ONE Product Info Sheet

Changing the Battery

Installing a Silicone Boot

1,616 Ratings

4.9out of 5 stars

1,616 Ratings

Rated 5 stars by 92% of reviewers

Rated 4 stars by 4% of reviewers

Rated 3 stars by 2% of reviewers

Rated 2 stars by 0% of reviewers

Rated 1 star by 1% of reviewers

Rated 5 out of 5

Mar 17, 2025

Like the temperature reading, I'm an 'instant' fan.

Expensive, but worth it. I have a T*****r, and I value the accuracy and super quick result that minimizes how much time the grill lid is up when checking temps (on several burgers, for example). I also appreciate the simple on/off functionality and the readout that rotates to always be easily read. This instrument is in a class of its own, with quality well above the lookalike probe I purchased first. Had I known how much difference there is, I could have saved $20-- and some meat from being overdone.

CHRIS G

Rated 5 out of 5

Mar 16, 2025

A+

Best thermometer in the game. Along with the best customer service around. Can't beat Thermoworks

Joey B

Rated 5 out of 5

Mar 13, 2025

Best thermometer in the game.

Great thermometer. Super accurate, durable and works every time.

JARED P

Rated 5 out of 5

Mar 13, 2025

I love this product. I've wanted one for a very long time g time and so thrilled I finally purchased this. Works just like described!

LENORE D

Rated 5 out of 5

Mar 13, 2025

Nice

Appreciate the accurate readings

JAY C

Rated 5 out of 5

Mar 12, 2025

Just buy it! Totally worth it.

Very fast, accurate and easy to use and read.

SCOTT L

Rated 5 out of 5

Mar 12, 2025

Great. Easy use! Exact temperature! Love it!

ZOHAR A

Rated 5 out of 5

Mar 12, 2025

Works great, very accurate, quick, and durable. Love the rotating display.

ROSS D

Rated 5 out of 5

Mar 12, 2025

Instant temperature reading!

Very accurate temperature reading and fast. Smart wake up when I want to take my steak core temperature. Display orientation will auto rotate so I don't have to take note how the probe is inserted

JEFFREY H

Rated 5 out of 5

Mar 11, 2025

Better cook.

I love it. It's already made me a better cook.

BARBARA V

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Why did you choose this?

ThermoWorksStore

Have two, best ever

STEPHEN TMar 19, 2025

online reviews

DIANA MMar 19, 2025

I needed one.

WILL CMar 19, 2025

Friend recommended

John CMar 19, 2025

Thermapen® ONE

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From the Blog

Digital Instant-Read Thermometer: Winner

ThermoWorks Thermapen ONE Review

Thermapen One Review | Best BBQ thermometer

ThermoWorks Thermapen ONE Review

Downloads

Thermapen® ONE

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