is supported by our Pitmaster Club. Also, when you buy with links on our site we may earn a finder’s fee. Click to see how we test and review products.

ThermoWorks Y-232-101 Therma Waterproof Kit Review

Share on:
ThermoWorks Y-232-101 Therma Waterproof Kit Review

This rugged, industrial-grade rapid read thermometer has industry leading speed and extras like min/max and hold functions, as well as a backlight and interchangeable probes. The unit tested is the Therma Waterproof paired with the 303-159 rapid-read probe. (The kit usually provides the 303-158 probe which is electrically identical to the 159 but with a smaller handle.) The readout cannot be left in the oven/grill while cooking, however, if used with cabled probes, this unit can act as either an in-food/in-cooker or a rapid-read hand-held thermometer.

The construction of this thermometer/probe pair is exemplary. It is hefty at nearly one-half pound, with all seams sealed to IP66/67 dustproof/waterproof levels. It can be fully submerged without harm. It can accept a wide variety of probes that can be viewed on the manufacturer’s website. The unit will auto-shutoff after 10 minutes, but this feature can be disabled by pressing the Hold button when turning the unit on. It reverts to auto-off when manually shut down. The unit can be calibrated as well. The uncluttered display has 0.6″/15mm numbers.

The temperature range of the probe/readout combination is probe-dependent, with the numbers here being dictated by the readout. The unit can respond to -148 to 2500°F (-100 to 1372°C) with the appropriate probe. The accuracy is within 0.5ºF throughout the range tested. Speed of response from ice water to boiling water is less than 2 seconds – as fast as they come. Battery life is rated at 10,000 hours, meaning you may never have to change them. The unit comes with a black zippered case with pockets for the meter, the probe and the instruction sheet.

The manufacturer’s contact info, including address, website and telephone numbers, is found on the instruction sheet. The package is covered by a two-year warranty. A certificate of calibration is supplied.

It would be hard to find a better-built, better-performing thermometer. At $154 for the kit, it isn’t cheap, but you get what you pay for. We give this unit a Gold medal for its build, performance, features and warranty.

Click here to order the Thermometer Kit.

Click her to order additional penetration probes.

Click here to order Hi-Temp probes.

Haven't found what you want?
Click the buttons below to search our complete database of reviews:

Product Information:

  • Thermometer Function:
    Hand Held/Instant Read, Leave in Food, Leave in Cooker
  • Item Price:
    $ 154.00
    *Price Subject To Change
  • Where to buy (buying from this supplier supports this website):
  • Probe:
    THS-303-158: length: 4" (10cm), diameter: 0.12" (3mm), tip: 0.06" (1.5mm)
  • Battery Type:
    3xAAA (included)
  • Battery Life:
    10,000 hours
  • Safe Operating Range:
    32 to 122ºF (0 to 50ºC)
  • Min & Max Temp:
    -148 to 2500°F (-100 to 1372°C) (Probe dependent)
  • Display Precision:
  • Actual Temp at 32 Degrees:
  • Actual Temp at 130 Degrees:
  • Actual Temp at 225 Degrees:
  • Actual Temp at 325 Degrees:
  • Speed from 32 to 212 Degrees:
  • Speed from 32 to 212 Degrees:
  • Numbers Display Size:
    0.6" (15mm)
  • Water Resistance Rating:
    IP66/67 (submersible)
  • Weight:
    0.49lb (220g)
  • C/F Switch:
    Built in CF switch
  • Backlight:
    Built in Backlight
  • Adjustable Options:
  • Color Options:
  • Thermometer Sensor:
  • App:
  • Logging:
  • Included:
    Thermometer, probe, case, instructions, Cert. of calibration
  • Available Accessories:
    Many to choose from
  • Alarms:

Published On: 5/7/2014 Last Modified: 7/24/2023

  • Bill McGrath, Chief Thermometer Reviewer - Bill McGrath is's Thermometer Maven. He has sophisticated equipment, an electrical engineering degree from Cornell University, and an MBA (almost) from UC Berkeley. Despite being mostly retired, he is still the person responsible for developing and updating all of ExxonMobil's training modules.


High quality websites are expensive to run. If you help us, we’ll pay you back bigtime with an ad-free experience and a lot of freebies!

Millions come to every month for high quality tested recipes, tips on technique, science, mythbusting, product reviews, and inspiration. But it is expensive to run a website with more than 2,000 pages and we don’t have a big corporate partner to subsidize us.

Our most important source of sustenance is people who join our Pitmaster Club. But please don’t think of it as a donation. Members get MANY great benefits. We block all third-party ads, we give members free ebooks, magazines, interviews, webinars, more recipes, a monthly sweepstakes with prizes worth up to $2,000, discounts on products, and best of all a community of like-minded cooks free of flame wars. Click below to see all the benefits, take a free 30 day trial, and help keep this site alive.

Post comments and questions below


1) Please try the search box at the top of every page before you ask for help.

2) Try to post your question to the appropriate page.

3) Tell us everything we need to know to help such as the type of cooker and thermometer. Dial thermometers are often off by as much as 50°F so if you are not using a good digital thermometer we probably can’t help you with time and temp questions. Please read this article about thermometers.

4) If you are a member of the Pitmaster Club, your comments login is probably different.

5) Posts with links in them may not appear immediately.



Click to comment or ask a question...


These are not paid ads, they are a curated selection of products we love.

All of the products below have been tested and are highly recommended. Click here to read more about our review process.

Use Our Links To Help Keep Us Alive

Many merchants pay us a small referral fee when you click our “buy now” links. This has zero impact on the price you pay but helps support the site.