Introduction
The ThermoPro TempSpike gets a lot of mentions in BBQ groups, so we thought we would review it to see how it compares to all the other truly wireless meat thermometers that we have reviewed. (Actually, we will be reviewing the Twin TempSpike which has two meat probes versus the one probe of the TempSpike.) If you aren't familiar with the term or concept of a truly wireless meat thermometer, let's take a quick look at what these truly wireless probes are.

The first truly wireless meat thermometers were the MEATER line of products. They had no wires between the probe that is stuck into the meat inside of a cooker and the device outside the cooker that displays the temperature information. How did these probes accomplish this? By using Bluetooth to communicate between the temperature probe in a cooker and a smart phone or tablet running an App outside the cooker.

And you further ask, how did they do this without burning up the electronics? Oh, they were very clever, they were. By enclosing all the temperature-sensitive components inside the portion of the probe which is actually stuck into the meat, that's how. That portion of the probe will never get above the temperature of the meat, so neither will the electronics. The rest of the electronics which can tolerate the higher temperature of a cooker reside higher up in the shaft of the probe in the portion which is exposed to the high heat of the cooker.

So what does this mean for cooking meat? Well, no more wires, obviously. No more kinked wires. No more fried wires. And imagine what this could mean for users with rotisseries: no more opening the cooker, stopping the rotisserie and using a handheld thermometer to check the temperature of the meat.

Now that you know what a truly wireless meat thermometer is, let's take a look at the ThermoPro Twin TempSpike to see how it performs.

NUGGET ALERT: When reading this review, keep a look out for Nugget Alerts. These are nuggets of information about the product that you might wish to pay particular attention to because of their importance.

Specifications And Features
Let's look at the features and specifications that can be gleaned from the ThermoPro website and owner's manual. The TempSpike Twin consists of three components, the probes themselves, the Booster, and the TempSpike App.

For the probes:

• Comes with 2 probes
• Stainless steel probes with ceramic handle
• Waterproof (IP67), dishwasher safe
• Wireless connection to the base device via Bluetooth 5.2
• Bluetooth range to booster: between 6.5 to 33 feet (2 to 10m) depending on type of cooker.
• Sensors: 2 temperature sensors, 1 food and 1 ambient
• Sensor type: Negative Temperature Coefficient Thermistors
• Internal temperature maximum temperature range: 212°F (100°C)
• Ambient temperature maximum temperature range: 572°F (300°C)
• Ambient temperature maximum temperature tolerance: 626°F (330°C)
• Temperature sensor accuracy: ±1.8°F (1.0°C) from 14 to 212°F (-10 to 100°C), otherwise ± 2%
• Rechargeable Battery: Up to 36 hours cooking time
• Charging time: 4 hours
• Dimensions: 5.2" (132mm) × 0.25" (6.5mm)
• Weight: 0.85 oz (24g)
• Uses: Grilling, baking, roasting, deep frying, air frying, sous vide

• Convenient integrated design stores and charges the 2 probes
• 1.875" x 0.625" (48mm x 15.9mm) backlit LCD display
• Charges your probes using USB-C
• Short USB-C cable is included
• Houses a Bluetooth repeater to extend the probe's range
• Bluetooth version: Bluetooth 5.2
• Bluetooth range: Up to 500' (152m) unobstructed, 65' (20m) obstructed
• Houses an audible alarm.
• Dimensions: 6.875" x 2.5" × 1.0" (174mm x 62.5mm x 26mm)
• Weight (without probes): 6.0 oz (170g)
• IP rating not stated

• Monitor the internal and ambient temperature of your food in real time
• Select the meat type and the app will automatically set a target temperature
• Receive audible and visual notifications when your food is ready
• Finish Time: Provides a countdown timer for when the food is expected to reach the target temperature.
• Add custom temperature notifications for the ambient sensor
• Available for iOS and Android smart devices
• No web browser access, app only
• Can connect up to three TempSpike devices simultaneously

A Photo Tour of the Twin TempSpike Base And Probes
So now let's take a look at the Thermopro Twin TempSpike Booster and probes. First. the base unit, which ThermoPro calls the Booster. It is made from plastic and comes with a clear plastic cover. It houses the display, buttons, Bluetooth repeater, and charging circuitry. Oddly, it doesn't have any sort of stand so you will have to lay it on its back or lean it up against something.

NUGGET ALERT: Either probe can be placed in either charging slot.

Next, we have a few more views of the booster. On the left, we see the charging electrodes that rub up against the tips of the probes. The next photo shows the charging electrodes that hold the shaft of the probes. The next photo shows a closeup of the booster's LCD display. And finally on the right, we show you the two-key keypad that contains the button that turns the LCD backlight on and off, and the "S" button that controls how temperatures are displayed.

Now let's take a look at the temperature probe:

As you can see, here we have broken the probe down into thirds. The left third, or the top of the probe, contains the handle, the ambient temperature sensor (red dot) and the Bluetooth antenna. The middle third shows the "minimum insertion line" which is your guide to ensuring you insert the probe deep enough into the meat to protect the temperature-sensitive electronics. And finally, the right third shows the tip of the probe which houses the single internal temperature sensor. The approximate location is indicated by the red dot.

NUGGET ALERT: For most brands of truly wireless temperature probes, it has always been vital that the part of the probe which makes contact with the charger be kept squeaky clean so that it can make electrical contact. If you have trouble cleaning your probe with soap and water, some 400-grit sandpaper does a great job of cleaning the probe.

NUGGET ALERT: Quite a number of people have reported over the years that with at least one brand of temperature probe, when pulling the probe out of the meat, the shaft of the probe pulls apart from the handle. The probe tends to stick to the meat at the surface due to juices solidifying and forming a bond between the shaft and the meat. We probably won't be able to determine if that's a problem with the TempSpike, but you can avoid this possibility by always remembering to first push the probe a short distance into the meat to unstick the probe, then pull the probe out.

The Booster Display and Controls

The Display: The ThermoPro Twin TempSpike booster has a 1.875" x 0.625" (48mm x 15.9mm) backlit LCD display. It has three display modes, Meat Temperature, Ambient Temperature, or cycling between the two. The display mode is changed by pressing the "S" button.

Booster display showing the meat temperatures.

Booster display showing the ambient temperatures.

Booster display cycling between meat and ambient temperatures.

And here is a diagram of the display with all the various elements identified:

The Controls: The booster also has two buttons on the front, the light button and the "S" button:

Pressing either button will turn the booster on. Pressing the light button will also turn on the display backlight.

The "S" button has several functions:

• Pressing it for 10 seconds will reset the booster.
• Pressing it for 3 seconds will pair the booster and the probes.
• Pressing it briefly will cause the display to rotate between displaying the meat temperature, the ambient temperature or cycling between the two.
• When the alarm is sounding, pressing the "S" button will silence the alarm.

Resetting The Booster
You can reset the Booster to its factory settings by removing both probes from the Booster and pressing and holding the "S" button for 10 seconds until a beep sounds. The device is now reset. The reset procedure could solve some abnormal issues such as unstable connections, lost temperature data, etc.

Auto Power Off
When both probes are placed in the Booster for charging, the Booster will automatically turn off after 5 minutes and the display will only show the charging status. When both probes are fully charged, the display will turn off as well.

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