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.

Tegam 931B Data Logging Thermometer Review

Share on:
Tegam 931B Data Logging Thermometer Review
The Tegam 931B Data Thermometer is an industrial-grade tool for measuring and logging temperature data. It can be used by itself or in conjunction with an app that runs on a smart phone, either Android or Apple. The phone app also acts as a bridge to a cloud repository for measurement data that can be retrieved as needed.
The thermometer electronics are contained in a hand-held case that provides control buttons and a connector that accepts the thermocouple probe. The unit can operate with virtually all types of thermocouples. The unit we tested, the 931B, has one probe connector; the 932B is a two-channel instrument. Many different probes are available that can address almost any measurement challenge. The main unit updates its temperature reading three times per second and can store one reading every second, or fewer if desired. The cloud can be updated every five seconds or less frequently if desired. Power is supplied by three AA batteries that the manufacturer claims will last 1000 hours.
The hand-held unit has an initial setup procedure that allows the user to select the thermocouple type and the temperature scale, either F, C or K. After setup, the large display shows the temperature, date, time, and the status of data collection. There is an internal memory that will hold roughly 1000 data points. When the app is used, the data is uploaded to the cloud, which will hold essentially unlimited data.
The app mimics the hardware’s display and control buttons. The connection is via a low-powered Bluetooth link that the manufacturer claims is good for about 30 feet (~9m) separation. While connected to the device, the app will relay data to an account created by the user on Tegam’s cloud server, where the data is stored and accessible for download and graphing. Multiple devices, identified by their serial numbers, can be associated with a single account. The cloud can also identify a given unit and associate it with a location or locations defined by the user.
The supplied probe appeared to be one designed for general usage. Other available probes have small diameter tips that might respond more quickly than the supplied probe, although its performance was very good. The probe’s stainess steel cable is the most robust one I’ve ever seen – true industrial grade!
While this unit can certainly be used by a cook to measure food temperatures, it is really designed for data collection on a large scale. That means it could be useful for monitoring temperatures over long periods of time in, say, an abattoir or an extended food processing chain. The package with a probe and carrying case will set the buyer back well over $400, making it a very expensive choice for simple measurement tasks. That said, some folks just like to have fancy toys, so you be the judge.
The thermometer comes with a two-year calibration guarantee and a three-year warranty. Contact info for the company is found in the accompanying documentation. The product is made in the USA.
Build quality and performance are first rate. I don’t usually test data loggers, so I’m not well-versed on all the features desired in these devices. I’ll leave it to the reader to explore the manufacturer’s website,, for futher information. I’m giving this unit a Gold Medal for quality and functionality, despite the high price for features that may not be relevant to the average home cook.
  • Thermometer Function:
    Hand Held, Leave in Food, Leave in Cooker, Wireless Remote
  • Item Price:
    $ 400.00
  • Where to buy (buying from this supplier supports this website):
  • Probe:
    Length: 4.5" (114mm), diameter: 0.125" (3.2mm), cable: 36" (0.91m)
  • Battery Type:
    (3) AA (included)
  • Battery Life:
    1000 hrs. (mfgr.)
  • Safe Operating Range:
    -4 to 131°F (-20 to 55°C)
  • Min & Max Temp:
    -418 to 3308 °F (-250 to 1820ºC)
  • 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:
    0.5" (12mm)
  • Water Resistance Rating:
    Not specified
  • Weight:
    12.3 oz. (347g)
  • C/F Switch:
    Built in CF switch
  • Backlight:
    Built in Backlight
  • Adjustable Options:
  • Color Options:
  • Thermometer Sensor:
  • Thermometer Connection:
  • App:
  • Logging:
  • Included:
    Thermometer, probe, batteries, instructions
  • Available Accessories:
    Cases, probes

Published On: 4/15/2018 Last Modified: 1/28/2021

  • Bill McGrath - 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 for comments...


These are not ads or paid placements. These are some of our favorite tools and toys.

These are products we have tested, won our top awards, and are highly recommend. Click here to read how we test, about our medals, and what they mean.

Use Our Links To Help Keep Us Alive

A big part of this site is our unbiased equipment and product reviews. We love playing with toys and we have no problem calling them the way we see them. Some companies pay a finder’s fee if a reader clicks a link on and buys a product. It has zero impact on our reviews, zero impact on the price you pay, and the sites never tell us what you bought, but it has a major impact on our ability to keep this site alive! So before you buy, please click our links. Here’s a link that takes you to a page on Amazon that has some of our favorite tools and toys:

Masterbuilt MPS 340/G ThermoTemp XL Propane Smoker

This is the first propane smoker with a thermostat, making this baby foolproof. Set ThermoTemp’s dial from 175° to 350°F and the thermostat inside will adjust the burner just like an indoor kitchen oven. All you need to do is add wood to the tray above the burner to start smokin’.

Click here to read our detailed review

Compact Powerful Sear Machine For Your Next Tailgater

Char-Broil’s Grill2Go x200 is a super-portable, fun little sizzler made of heavy, rust-proof cast aluminum. The lid snaps shut. Grab the handle and you’re off to the party! Char-Broil’s TRU-Infrared design produces searing heat while reducing fuel consumption. A 16 ounce LP gas canister is enough to keep you flipping burgers for hours.

Click here to read our detailed review and to order


Comprehensive Temperature Magnet With 80+ Important Temps temperature magnet
Winner of the National BBQ Association’s product of the year award. This 8.5″ x 11″ magnet contains more that 80 benchmark temperatures for meats (both USDA recommended temps as well as the temps chefs recommend), fats and oils, sugars, sous vide, eggs, collagens, wood combustion, breads, and more. Although it is not certified as all-weather, we have tested it outdoors in Chicago weather and it has not delaminated in three years, but there is minor fading.

Click here to order.

Fireboard: The Ultimate Top Of The Line BBQ Thermometer

Fireboard Labs Product Photo Shoot. Kansas City Commercial Portrait and Wedding Photographers ©Kevin Ashley Photography

With the ability to monitor up to six temperatures simultaneously with either Bluetooth or Wifi on your mobile phone, tablet, or computer, Fireboard is the best digital thermometer we’ve tested.
Click here to read our detailed review

Is This Superb Charcoal Grill A Kamado Killer?

The PK-360, with 360 square inches of cooking space, this rust free, cast aluminum charcoal grill is durable and easy to use. Four-way venting means it’s easy to set up for two zone cooking with more control than single vent Kamado grills. It is beautifully designed, completely portable, and much easier to set up for 2-zone cooking than any round kamado.

Click here to read our detailed review of the PK 360

Click here to order directly and get an exclusive deal

GrillGrates Take Gas Grills To The Infrared Zone

GrillGrates(TM) amplify heat, prevent flareups, make flipping foods easier, kill hotspots, flip over to make a fine griddle, and can be easily moved from one grill to another. You can even throw wood chips, pellets, or sawdust between the rails and deliver a quick burst of smoke.

Click here for more about what makes these grates so special

Bring The Heat With Broil King Signet’s Dual Tube Burners

3 burner gas grill

The Broil King Signet 320 is a modestly priced, 3-burner gas grill that packs a lot of value and power under the hood. Broil King’s proprietary, dual-tube burners get hot fast and are able to achieve high, searing temps that rival most comparatively priced gas grills. The quality cast aluminum housing carries a Limited Lifetime Warranty.

Click here to read our complete review