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 Smoke X4 Four Channel Wireless Food Thermometer

Share on:
ThermoWorks Smoke X4 Four Channel Wireless Food Thermometer
The ThermoWorks Smoke X4 is an evolutionary product along the lines of the original Smoke and the Signals. It is a four-channel transmitter/receiver pair (also available in a two-channel model) that is touted to have a line-of-sight range of two kilometers or about 1.25 miles. This is an order of magnitude greater than other long-distance remote thermometers. The Smoke X4 also works with the ThermoWorks Billows blower for thermostatic control of a wood- or charcoal-fired cooker. 
In the way of comparison, the newer Smoke X4 has a much longer range than the original Smoke, and can be had in either a two-channel version or the four channel tested here. While the original Smoke could bridge to the internet using the Gateway accessory, the newer model cannot be used in this way. The four-channel Signals unit does not have a dedicated receiver like the Smoke products, relying instead on a connection to a smartphone. Customer preferences will dictate which product is most appropriate.
Like the orignal Smoke (without the Gateway accessory), this unit works without needing a smart phone, relying on its included remote receiver. It cannot be monitored via the internet or Bluetooth. The included receiver displays all four channels, just like the base unit. All settings are configured on the base; the user cannot change alarm triggers via the remote receiver. The upside of this arrangement is that the base can be used without the remote if you’ll be close to the cooker. In this case, the transmitter can be turned off to conserve battery power.
The package includes four probes: three long, L-shaped pointy ones for food and one shorter probe for measuring the cooker temp. If the cooker probe is inserted into channel four, and a Billows blower is attached, this channel becomes the controller for the temperature regulating system. You can set the desired temp and the system will maintain it, given adequate fuel.
On the base unit, each channel displays the probe temperature, the upper and lower alarm limits, the minimum and maximum temps since turn-on, and the alarm status – on or off. The remote unit displays everthing for each channel except the min/max info. If the Billows is attached, channel four displays the cooker temp and the target temperature, and it sounds an alarm if the temp in the cooker is not within 25°F of the set value. See the Billows review for more details.
The probes are robust, with a heavy stainless steel braid and strain reliefs at both the probe and the plug. They are water resistant, but ThermoWorks cautions against submersion. Both the transmitter and receiver are solidly built, like all ThermoWorks products. The price reflects the quality level, but you only have to pay it once.
How about the range? ThermoWorks says up to 1.25 miles (6600 feet) – line of sight. I set the transmitter in our yard and started walking. I lost contact when I was about 900 feet away, and regained contact when I was around 700 feet from the transmitter. I live in an RV park, so there were a lot of rigs spread around, along with a large building and some tall conifers. Radio waves are affected by many things. This radio works around 915 MHz, in the UHF band, where trees and buildings absorb a lot of the RF energy. My conclusion is that the range of this transmitter/receiver pair should be adequate under nearly all circumstances.
The unit comes with decent instructions without having to search online for a manual. Contact info for the manufacturer is included in the documentation. The warranty is two years. This is an industrial grade tool that should last forever. If you don’t need the ability to connect via smart phone and you need longer range, this unit could well be your ticket to ride. Recommended.
Haven't found what you want?
Click the buttons below to search our complete database of reviews:

Product Information:

  • Thermometer Function:
    Leave in Food, Leave in Cooker, Wireless Remote
  • Item Price:
    $ 199.00
    *Price Subject To Change
  • Where to buy (buying from this supplier supports this website):
  • Probe:
    (3) Food: length: 6" (15 cm), diameter: 0.140" (3.5 mm), tip: 0.086" (2.2 mm), cable: 53" (1.35 m); cooker: length: 2" (5 cm), diameter: 0.140" (3.5 mm), cable: 53" (1.35 m)
  • Battery Type:
    Rx: 2xAA, Rx: 2xAA
  • Battery Life:
    Tx: 330 hrs; Rx: 1800 hrs.
  • Safe Operating Range:
    14 to 122°F (-10 to 50°C)
  • Min & Max Temp:
    -58 to 572°F (-50 to 300°C)
  • 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:
  • Numbers Display Size:
    0.562" (1.43 cm) (temps)
  • Water Resistance Rating:
    IP66 - Splash proof
  • Weight:
    Tx: 8.9 oz (253 g); Rx: 5.6 oz (159 g)
  • C/F Switch:
    Built in CF switch
  • Backlight:
    Built in Backlight
  • Adjustable Options:
  • Color Options:
    White, yellow, green, red, blue, orange, pink, purple, black
  • Thermometer Sensor:
  • Thermometer Connection:
  • App:
  • Included:
    Sending unit, receiver, 3 food probes, 1 cooker probe w/clip, lanyard, colored donuts for probes, instructions, batteries
  • Available Accessories:
    Billows Thermostatic Controller, additional probes
  • Alarms:

Published On: 4/2/2020 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.