How to Use a BBQ Temp Controller for Sous Vide

To use a BBQ temperature controller for sous vide, put your food in a sealed bag, submerge it in a water bath, drop the controller's food probe into the water, and set the sous-vide mode to your target temperature (for example, 133°F for medium-rare steak). The controller's fan and probe hold that water temperature steady for hours — no simmering pot to babysit.

It sounds like a stretch, but the same technology that keeps your smoker locked at 225°F can also hold a water bath at a precise, gentle temperature. Here's how it works and how to do it safely.

Can a charcoal temperature controller really do sous vide?

Yes — but only controllers that include a dedicated sous-vide mode. A normal pit controller reads the air temperature inside your grill and runs a fan to feed the coals. Sous vide is the opposite problem: you're heating water, which holds heat very differently than air, and you need much lower, tighter target temperatures (usually 120°F–185°F instead of 225°F–275°F).

The BBQube TempMaster Pro includes a sous-vide mode designed for exactly this. Instead of controlling a fan against a pit-air probe, it uses a food probe placed directly in the water and manages a small immersion heater or a very low charcoal load to keep the bath dialed in. Set your target, and the app holds it.

Sous vide simply means "under vacuum" — food sealed in a bag and cooked in precisely temperature-controlled water. Because the water never gets hotter than your target, food cooks to a perfect edge-to-edge doneness and literally cannot overcook.

What do I need to set up sous vide with my controller?

• A container of water — a large pot, cooler, or dedicated tub. Insulated containers hold temperature better and use less energy.
• A heat source the controller manages — for sous-vide mode this is typically a small submersible heating element rather than charcoal.
• Sealed bags — vacuum-sealed or heavy zip-top bags using the water-displacement method to push out air.
• A reliable food probe in the water — this is the sensor the controller reads to hold the bath temperature. An accurate, fast-response probe matters more here than anywhere else.

Because sous vide lives or dies on probe accuracy, use a quality food probe. The 8-foot food probe gives you plenty of slack to route the wire out of the bath and over to the controller, and its stainless construction shrugs off constant submersion. For a shorter run, a standard 6-inch fast-response food probe works well too.

How do I actually run the cook, step by step?

1. Season and seal. Salt your food, add aromatics if you like, and vacuum-seal or use water displacement to remove air from the bag.
2. Fill and preheat. Fill your container with warm tap water to speed things up. Turn on sous-vide mode and set your target temperature.
3. Place the probe. Clip or suspend the food probe in the water — not touching the bottom or the food. This is the temperature the controller regulates, so keep it in open water.
4. Wait for temperature, then add food. Once the bath reaches your target, submerge the bag. Clip it to the side so it stays fully underwater.
5. Set it and walk away. Monitor in the app. Because water holds temperature evenly, there's nothing to adjust — check that the bath stays within a degree or two of target.
6. Finish with a sear. Pull the food, pat it dry, and sear hard over hot charcoal or in a screaming skillet for crust and color.

What temperatures should I target?

These are common sous-vide doneness temperatures. Cook times depend on thickness, not just temperature.

• Steak, medium-rare: 129°F–133°F for 1–4 hours
• Steak, medium: 135°F–140°F
• Chicken breast: 145°F–150°F for 1–2 hours (juicier than oven-cooked, still safe when held)
• Pork chop: 140°F–145°F
• Salmon: 120°F–125°F for buttery texture
• Eggs (soft): 145°F for about 45 minutes

Food safety for sous vide depends on both temperature and time — lower temps require longer holds to be safe. For the detailed pasteurization tables, the USDA and AmazingRibs.com are excellent references. When in doubt, cook chicken and pork to conventional safe internal temperatures.

Why bother when my controller was built for smoking?

The whole point of an automatic controller is hands-off precision, and sous vide is precision cooking. If you already own a TempMaster Pro for overnight briskets and set-and-forget pork butts, its sous-vide mode is a genuine bonus — you can do a perfect medium-rare tri-tip in the water bath, then fire up the coals for a fast sear. One tool, two ways to lock in temperature so you can spend the afternoon with your family instead of hovering over a thermometer.

Common mistakes to avoid

• Letting the bag float. Trapped air lifts the bag out of the water and creates uneven cooking. Reseal or weight it down.
• Resting the probe on the bottom or against the food. You want the true water temperature, not a hot spot or the food's temperature.
• Skipping the sear. Sous vide gives you perfect doneness but no crust — always finish hot and dry.
• Using a slow or inaccurate probe. A drifting probe means a drifting bath. Use a calibrated, fast-response food probe.
• Uncovered bath on long cooks. Cover the container to slow evaporation and hold temperature more efficiently.

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