ThermoWorks RT304 Water Resistant Thermometer Review
The ThermoWorks RT304 Water Resistant Thermometer has good accuracy, fairly good response times and is immune to incidental moisture. It cannot be left in the oven/grill while cooking.
The unit has an on/off switch but it will NOT turn itself off automatically. There is a min/max button and another to change between F and C scales. It is sealed against moisture. The buttons and display are small and might pose a challenge for some users. Response times are better than many of its competitors, but not in the super-fast range.
The manufacturer’s contact info, including telephone number and website, is found on the instruction sheet. There is no explicit warranty stated, however, this company stands behind its products.
We give this thermometer a Bronze medal for accuracy, construction and performance. The lack of an auto-off feature or a hold feature, combined with the small buttons and display, prevent a higher rating.
Where to buy (buying from this supplier supports this website):
Length: 4.75" (12.0cm), diameter: 0.14" (3.5mm)
Safe Operating Range:
32 to 122ºF (0 to 50ºC)
Min & Max Temp:
-58 to 392ºF (-50 to 200ºC)
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:
Water Resistance Rating:
1 oz (28g)
Built in CF switch
Thermometer, probe sheath
Published On: 5/7/2014
Last Modified: 1/25/2021
Bill McGrath - Bill McGrath is AmazingRibs.com'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 AmazingRibs.com 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.