Thermapen® ONE by ThermoWorks

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

Overview
In Action
Trusted By
Specs
More Info
Accessories
Reviews/Q&A

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."
Read the Review

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."
Read the Review

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.
Read the Review

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

Leather Wallet for Thermapen, WAND, and More

Fits Thermapen with or without silicone boot installed. Also great for WAND. Protect your investment.

Thermapen® ONE Silicone Boot, Magnetic Glow-in-the-Dark

Magnetic, Thermapen ONE glow-in-the-dark, translucent, protects from drops and radiant heat.

Protective Zip Wallet

Padded vinyl pouch with zip closure and carry loop, protects and stores. (Fits Thermapen and WAND.)

Thermapen Wall Bracket

Stainless steel wall bracket with mounting holes for Thermapens. Fits Thermapen ONE with boot installed (rear-facing) as well as all models of Thermapens without boots installed.

Thermapen Magnetic Band and Lanyard

Keep your Thermapen ONE safe and within reach. This low-profile magnetic silicone band and detachable lanyard secures your Thermapen ONE to any metal surface or around your neck — ensuring it’s always handy when you need it most.

2,550 Ratings

4.8out of 5 stars

2,550 Ratings

Rated 5 stars by 93% of reviewers

Rated 4 stars by 3% 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

May 29, 2025

Great Quick Temperature Feedback!

I just used my Thermapen ONE for the first time cooking a big steak on the grill. I loved being able to probe multiple locations quickly to determine when to remove the steak from the grill.

NEIL H

Rated 5 out of 5

May 28, 2025

Super-fast probe!

I Just love this Instant read probe. I have never had one with reading this fast before. After a calibration check in ice water and then in boiled water I used while Grilling, Stove top cooking, roasting and Smoking as my double check probe or primary probe depending on what and where I was cooking. Would like to see integrated magnets but understand that not everyone can have one especially when they have a pacemaker! Maybe 2-coin size spots that can be open and closed so a user could install or remove the magnets if they need too? I do not like the add on case as it makes it a pain to slide into your pockets.

ROBERT S

Rated 5 out of 5

May 28, 2025

thrilled

thrilled to have such a fast and accurate read on a thermometer!

DENISE P

Rated 1 out of 5

May 28, 2025

No Magnet

No magnet. Paid more but less utility. Insist on magnet otherwise it sits in your drawer and need to find out and pull out every time. Very Disappointed when I thought I did a repeat order was sent a deficient device. Would give a zero if possible.

STEPHEN S

Rated 5 out of 5

May 27, 2025

Fantastic! Just as advertised! Definitely upgrade from original Thermopen

RALPH C

Rated 5 out of 5

May 27, 2025

Great products, amazing customer care!!!!!!!!!!

I love mine. Super quick reading, the rotating screen, just the best. I did have an issue though and it stopped working randomly. Emailed customer support, they responded very quickly and after a few questions and a couple of pics they took care of it. I was supposed to receive it after a few days and realized I didn't. I followed up with them and I had mixed up a couple of numbers on my address and they still fixed. Super kind and very responsive.

Jason W

Rated 5 out of 5

May 26, 2025

Great arsenal to have in your kitchen period!

The most accurate thermometer in the market. I love my thermometers I own 3 and the probes as well, never been more happy with the results I get from checking temps with my Thermapens and probes. If you're in the market for some thermometers don't settle for second best make the investment today and reap the results from perfectly cooked foods for you and your family to enjoy!

ANTONIO V

Rated 5 out of 5

May 26, 2025

Great Thermometer

Works as advertised. Like the gaurantee.

JORAM F

Rated 5 out of 5

May 26, 2025

This is my 2nd thermopen, my 1st lasted about 20 years so needless to say, I like my thermopen just fine.

CHET C

Rated 5 out of 5

May 25, 2025

Great as always!

KEVIN N

Have a question? Ask owners.Have a question about this? Ask people who own it.

Start typing and see existing answers.

Why did you choose this?

ThermoWorksStore

Love mine and getting one as a gift for my sister!

MATTHEW PMay 29, 2025

Gift

STEVE ZMay 28, 2025

Quality is great. Auto backlight.

Patrick NMay 28, 2025

Good Quality

DAN KMay 28, 2025

Thermapen® ONE

In Stock

As Seen On

Thermapen® ONE

You May Also Like

Help & Info

Customer Support

Our Company