January 31

The Joule Sous Vide Circulator: Next Generation Cool

By trk

Last Updated: October 7, 2020

If you're in the market for a sous vide circulator, you should definitely consider the Joule sous vide circulator. It's one of the coolest kitchen products on the market right now! 

If Apple made a sous vide circulator, it would be the Joule. Slim, white, minimalist, and powerful, the Joule sous vide circulator is the newest immersion circulator to hit the market. It's truly next-generation sous vide technology, and definitely worth taking a look at.

See also:

The Best Sous Vide Immersion Circulators

Sous Vide Time and Temperature Table for Proteins

5 (Or So) Ways to Minimize Sous Vide Plastic Use

The Best Sous Vide Circulators Under $100

Introducing Joule

Check Price on Amazon (original Joule)

Check Price on Amazon (all-white Joule)

Joule Review

The Joule sous vide circulator is designed with the user in mind. It's compact, lightweight, easy to use, easy to store, and at 1100 watts, more powerful than most other circulators in its class.

Joule uses a free app that guides you step-by-step through the cooking process, including photos that aid you in figuring out settings and cooking times to get your desired results (you can also bypass these tutorials and just set the unit how you want). It's also the first immersion circulator you can use with Alexa, Amazon's voice-controlled personal assistant device. 

The Joule was introduced by Chef Steps late in 2015 and became available on Amazon late in 2016. Chef Steps was founded by Chris Young, a co-author of Modernist Cuisine, so you can be certain that they knew what they were doing with the Joule and that it's a top notch product.

Here are some of Joule's coolest features:

  • Small enough to fit in a drawer​
  • 1100 watts of power and its "thick film heater" technology make it one of the most powerful (that is, fastest) circulators on the market
  • Controls temp within 0.2F/0.1C
  • Works in water levels from 1.5 inches up to 10 gallons
  • 2 ways to attach to cooking vessel: clip and magnet (on bottom of unit)
  • Free app compatible with any smart phone
  • Works with Amazon Alexa (i.e., voice commands)
  • Recipe apps with guides and pics to ensure perfectly cooked food.

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What is Sous Vide?

Sous vide (pronounced "soo veed") is a French term that means  "under pressure." It's a method of cooking bagged, sealed food in a water bath at a very precise temperature. Because you have total control over the temperature and cooking time, the result is perfectly done food every time. And because the food is sealed inside a bag, it retains all its juices and flavors.

Sous vide is a revolutionary way to never have dry chicken breast again, or lose the flavor of braised meat to its cooking liquids. The flavor stays in the food.

When choosing a sous vide device, you have two options: a water bath or an immersion circulator. The water bath is a self-contained unit that you fill with water to cook your food. (You can see what one looks like here.) An immersion circulator is a detachable pump/temperature controller that you can use on any container it fits into.

There are advantages and disadvantages to both technologies, but right now, the circulators are more popular. They're smaller, easier to store, and easier to adapt to different situations. Most of them are also less expensive than the water baths.

The Joule, of course, is an immersion circulator.​

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What Makes the Joule Sous Vide Circulator Great?

When considering which sous vide immersion circulator to buy, these are the important factors: 

  • Ability to hold temperature
  • Speed (that is, power or wattage)
  • User interface
  • Water level
  • Aesthetics and overall quality.

Let's see how the Joule stacks up in each of these categories.

Ability to Hold Temperature

The whole principle underlying sous vide cooking is constancy of temperature. This is what makes sous vide so great at turning out perfectly done steaks, eggs, vegetables, cremé brulee, and anything else you care to try with it. And not only can you get precise doneness, you can also manipulate the texture of foods by how long you leave them in the bath--because they're set to the exact temp of doneness, they will never overcook. One great example of this is the Modernist Cuisine recipe for 72 hour short ribs: sure, they're "done" after a few hours, but if you want them tender and flaky, yet still medium rare, you can cook them for the full 72 hours.

The Joule sous vide circulator holds temperature to two-tenths of a degree Fahrenheit (+/-0.2F). This is extremely accurate--as much accuracy as any chef will ever need.​​​back to top

Another benefit to the constant temp is that you can eat when you're ready. You are no longer a slave to your oven or stovetop. Overcooking, burning, and drying out your food is a thing of the past. Most proteins can sit in a  water bath for a few hours after they've fully reached temperature without adverse effects. So if you get sidetracked, no big deal. Your dinner is ready and waiting for you, ready when you are.

Speed (Power)

Power, measured in watts, is a measure of how fast an immersion circulator can bring a pot of water up to the set temperature. You may not think speed is important, since sous vide is not a fast-cook method to begin with. However, how fast the circulator can bring a pot of water up to cooking temperature is a major factor in how quickly you can get a meal on the table.

At 1100 watts, the Joule ranks among the most powerful immersion circulators available. It also uses a different heating element than other circulators called a "thick film heater." This thick film heater technology is very efficient, so even though Joule is smaller, it is also more powerful and faster than most other circulators on the market, particularly in this price range (i.e., less than $200).

In actual use, the Joule is able to heat up a stockpot full of room temperature water to 140F in about 20 minutes. (An Anova takes about twice as long.) It heated hot tap water to 140F in less than 10 minutes. These results will vary based on the variables of your kitchen, but this compares very favorably to other units on the market.


The Joule sous vide circulator can bring a pot of water to temp faster than most other circulators on the market.

User Interface

Immersion circulators can have buttons, dials, switches, and LED displays for the user interface. The Joule however, has none of these.

The Joule is unique in the world of immersion circulators. The unit itself has no controls, other than an On/Off button (the entire top piece) and one indicator light. All settings are done remotely, from an app on your smart phone, iPad, or via Amazon Alexa. ​

​If you're an app lover or technology geek, this probably sounds great to you. If you're not, then you might be a bit reluctant to embrace this concept. And it's true that there are both advantages and disadvantages. 


The advantages are that this is a big part of what makes the Joule small-yet-powerful. This is what makes it possible for the Joule to weigh just over a pound and yet have power comparable to circulators more than twice its size.

The cooking apps are also fabulous, especially for beginners. You can essentially "cook by pictures," selecting the doneness you want from a photograph, and let the Joule do the rest. This eliminates guesswork! Or, if you know your settings, you can just as easily set the Joule where you want it. You're just doing it remotely instead of on the unit.


The Joule with its cook-by-pictures smart phone app.


The disadvantages to having remote controls are that you don't have a display on the unit itself to see what's happening--although the indicator light does provide the most relevant information: heating, at temp, and done (orange, green, and flashing green, in that order). You may also find using an app to be cumbersome or inconvenient when all you want to do is bring some water up to temperature. And we can't say that it's easier than just setting the circulator itself, because it isn't.

And of course, there is always the possibility that you may be without your smart phone, for whatever reason. You can't run the Joule without it. So it requires an infrastructure that "dumber" circulators do not. And speaking of infrastructure, there is a learning curve, and all the other headaches that come with software-dependent devices: you have to register and get set up on the Chef Steps website, then learn to use the application. 

The apps are also constantly changing, so you have to download updates for the most current information. This isn't a disadvantage--in fact, it's pretty cool. But it does add another layer of complexity to using the Joule.

So, in short, if you prefer the minimalist design and technical interface, the Joule is for you. If you prefer a device with its own controls, get another circulator. 

see our immersion circulator and water oven reviews

See our review of immersion circulators under $100

Water Level

One thing we really love about the Joule is that it will operate in just a couple of inches of water. With its magnetized bottom, it is designed to sit on the bottom of a pot. This is great if you're using small cooking containers, like half-pint mason jars filled with creme brulee (see a recipe for sous vide creme brulee), and also great if you're doing a long cook and forget to top off the water level before you go to bed.

Because the Joule can run in just a couple of inches if water, it will continue to run longer than just about any other circulator on the market. Most circulators shut themselves off when the water level gets too low. This could mean the difference between saving a package of short ribs on a 72 hour cook, or having to throw them away because the circulator stopped while you were sleeping--it usually happens at least once to the new sous vide chef. But not if you're using Joule.

Aesthetics and Overall Quality

“Aesthetics” refers to the design of the circulator: heft, solidity, and overall look and feel. The circulator should appeal to you not only on a functional level and a price level, but should also be a joy to use.

You may think that aesthetics in everyday objects is unimportant, but at Rational Kitchen, we believe that aesthetics are the most important in everyday objects. Because you use them every day! Cheap, crappy objects add to life’s drudgery. But everyday objects that have a nice heft and pleasurable feel can make daily chores feel almost luxurious. They spark joy in the mundane, everyday moments of your life--how can that not be important??

 If you cook every day, you should try to surround yourself with kitchen tools that add pleasure to your life, not detract from it.

The Joule sous vide circulator certainly gets a high rating on aesthetics and overall quality. 

The Joule does have one design drawback: the clip is a bit small, so probably not wide enough to fit on a cooler or other vessel with wide walls. Which is a bit of a flaw for an immersion circulator that can work with up to 10 gallons of water. If you find yourself needing to use a large vessel (like when you're cooking for several people), you'll probably have to buy a dedicated sous vide container. This is a nice one because the lid and sous vide balls (which decrease evaporation) are included.


The Joule comes in a sturdy storage case that fits in a drawer.

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Do I Need an Internet Connection to Use the Joule?

​You will always need some way to connect the remote app to the Joule, but it doesn't have to be the Internet. Once you have the Joule paired to your smart device, you can use Joule with Bluetooth only. So while you'll need an Internet connection to download the Joule software, for subsequent updates, and to do the initial pairing, you need only bluetooth to actually operate the Joule.

How Do I Clean the Joule?

Immersion circulators tend to keep themselves pretty clean, as they have fresh water continuously moving through them. So most maintenance involves giving it a wipe down with a damp cloth and letting it dry.

If you have a bag break and the parts get gummed up, you can run Joule in a dilute vinegar bath, then remove the bottom to get inside and gently wipe down the parts. ​You can see these cleaning details on the Chef Steps site.

Never submerge the Joule completely, or put in a dishwasher. ​This could damage the Joule's electronic components.

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Do I Need a Vacuum Sealer to Use the Joule?

No, you don't need a vacuum sealer. You can use storage bags and the water displacement method. However, a vacuum sealer makes sous vide cooking easier (just toss the bag in the water) and more convenient (you can freeze sealed bags of food with seasoning so they're ready to toss into the water). You also need one for best results when doing long cooks (more than a few hours), as ziptop storage bags aren't going to withstand the time in the water bath--they tend to rip apart at the seams.

But the real reason to use a vacuum sealer is because it will pay for itself within a year in less wasted food. Food stays fresh longer in the fridge, freezer, and pantry when it's vacuum sealed. It's also wonderful to have vacuum sealed meals in the freezer, ready to go into the water bath when you get home from work. It's truly genius.

For more info, see Why Every Kitchen Needs a Food Vacuum Sealer.

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Joule sous vide circulator Insides

The inner workings of the Joule.

Joule Specifications

Size: 1.85 in. in diameter x 11.0 in. tall

Color: White

Weight: 1.3 lbs

Housing: Polycarbonate and stainless steel​

Power: 1100W (standard 120VAC plug-in)​

Temperature Range: 68F-208F (20-98C)​

Temperature Variance: +/-0.2F (0.1C)​

Min/Max Immersion Depth (in.): 1.5/8​

Pump Speed: 3.6-6L/minute (higher at higher temps)

Max Water Capacity: 10 gal (40L)​

Water Level Sensors: Thermal, high current protection (i.e., shuts off if water level goes too low)​

Clamp Type/Opening: Clip/0.75in. (NOTE: Also has magnet on bottom for use in steel pots)

Timer: Yes​

Cord Length: 42 in.

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Final Thoughts

If you want a petite, powerful sous vide immersion circulator that you can store in a silverware drawer, and you don't mind using your smart phone to operate it, then the Joule is for you. The price has dropped so it's a perfect time to buy--and it makes a great gift for someone who loves to cook!

If you don't like the idea of needing to use a smart device to operate Joule, keep looking.


Thanks for reading!

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