The TP25 is a thermometer with four wired probes and a transmitter that sends the readings to your smartphone via Bluetooth 5.0 and shows them on its own display. The manual calls it Bluetooth Cooking Thermometer, and the manufacturer’s page calls it TempSync PRO TP25. We have not handled it. Our details come from the manufacturer’s page temppro.com, from the manual (a leaflet in English, French and Spanish; we did not find a German version), from Amazon’s catalogue entry and from our product photo.
The brand name has changed: ThermoPro is now called TempPro. Under the ASIN B082WS7F14, Amazon lists TempPro as brand and manufacturer, model TP-25, colour white, variant 4 PROBES; on our photo the ThermoPro lettering is still on the front. According to the Amazon listing, the mission, company structure and products stay the same, and depending on delivery a device with the old or the new name may arrive. Our price box lists approx. €37, and the shop may show a different amount. The category Grill thermometers collects more devices of this kind.
Transmitter, probes and accessories in the box
According to the manual (section Components), the box contains one transmitter, four straight probes, a USB charging cable, two clips and the instructions. Amazon lists the same and describes the probes as stainless steel; according to Amazon, the clips are intended for the oven and the grill grate. No power adapter is included; according to the manual, you charge from any USB charger.
Each probe is 8 inches long (205 mm), and with its cable it measures 49 inches (1250 mm) in total. The table on the product page lists NTC as the sensor type. The cover image and the drawing in the manual number the probes 1 to 4 and show the plugs in white (1), blue (2), black (3) and gold (4). On our photo the sockets are spread out, two on the left and two on the right of the housing, and the plugs are angled.
According to the product page, the transmitter measures 100 x 75 x 52.5 mm. The Amazon field gives 297 x 172 x 67 mm; that does not fit the transmitter and is probably the packaging size, so we do not use it. The LCD has a backlight and shows four fields, PROBE 1 to 4, at the same time; in the manual’s drawing, symbols for battery, Bluetooth and unit are added. A touch button with a light bulb symbol on the front switches the backlight. On the back are two more buttons: one with an on/off symbol and °C/°F (pressing once switches on or off, holding for three seconds selects the unit) and the Bluetooth button. According to the manual, these are all the controls on the device; a timer display or timer button does not appear in it. The product page lists up to four timers under the app functions.
A wire stand is used for setting it up: you place the transmitter on a worktop, or you turn the stand around and hang the device up. Amazon additionally mentions a magnetic back for the smoker, a fold-out stand and a hanging loop; a magnet does not appear in the manual. For tidying away, the product page mentions a Probe Winder, a reel for the probes.
In detail: NTC sensor, measuring range and accuracy
An NTC sensor is a thermistor. As it gets warmer, its electrical resistance falls, and the electronics in the transmitter convert the resistance into a temperature. For the cooking chamber temperature you use one of the four probes: according to the product page, the TP25 monitors up to four pieces of meat or three dishes plus the ambient temperature of the grill, smoker or oven. In our reading, the two clips in the box are the obvious holder for this. On the app screenshot in our product photo, probes 1 and 2 show remaining time, internal and target temperature, and probes 3 and 4 show an ambient value with a low and high limit. The photo therefore shows two ambient displays where the manufacturer’s page speaks of one; we go by the manufacturer’s page.
According to the manual and the product page, the probes’ measuring range runs from 14 °F to 572 °F, that is from minus 10 to 300 °C. On accuracy, the manual is more differentiated than the product page: it gives ±1.0 °C (±1.8 °F) for food temperature between 0 and 100 °C and ±1.5 % outside that range. The product page gives a blanket ±1.0 °C, without a range. We work with the manual’s values.
In our assessment, the two-part specification fits everyday grilling, because everything inside the meat is below 100 °C: our core temperature chart lists poultry from 72 °C and pulled pork at 88 to 95 °C. Within a band of ±1.0 °C, a core that the display reports as 72 °C may actually be at 71 °C. An alarm at 73 °C keeps the margin to the minimum temperature for poultry.
A probe in the cooking chamber usually measures above 100 °C, where the ±1.5 % applies. The manual gives that figure under food temperature, and we carry it over to the ambient reading. If it refers to the measured value, that would be around 1.7 °C for a smoker at 110 °C and 3.75 °C at 250 °C in the grill.
How far does the signal reach from the transmitter to the smartphone?
According to the manufacturer, up to 650 ft, that is 200 m, outdoors at 25 °C and without obstacles or interference from other radio sources. With a wall, fence or grill lid in between, it gives no figure.
The manual writes “Remote Range: 650FT(200M)” and bases the figure on its own measurements; depending on the number of obstacles and the electromagnetic environment, the range may differ. The signal is sent by Bluetooth 5.0 in the 2.4 GHz band, and the product page mentions certification by the Bluetooth SIG. As a general rule, Wi-Fi routers also transmit in this band, and closed metal shields radio signals.
With wired probes, the radio part is outside the cooking chamber. On the category page for wired models, TempPro writes that the thin cable runs under the closed lid to the transmitter; the TP25 is not named specifically there. Wireless probes, by contrast, have to transmit out of the cooking chamber. The ThermoPro TempSpike Twin gives only 4 m in its instructions, in the worst case, for the distance from the probe to the booster in a closed metal cooker. Inkbird states 46 m outdoors for the IBT-4XS, just under a quarter of what TempPro states for the TP25.
Setup and app
The manual describes six steps. First you search for TempPro in the Apple App Store or on Google Play and install the app, then you switch on Bluetooth on the smart device. The transmitter is fully charged with the charging cable, after which you plug the probes into the matching sockets and press the button with the on/off symbol on the back. The Bluetooth symbol at the top of the display starts to flash. In the app you tap the scan symbol at the top right and scan the QR code on the back of the device; alternatively, you choose TP25(X) from the device list via the plus symbol. The device is then added in the app and connected to the TempPro cloud, the symbol on the transmitter stops flashing, and the app switches to the cooking page with the probe temperatures. According to the manual, help is available in the app’s FAQ and from customer service.
Which app is the right one today is covered in the questions above, because the manual and the product page use different names.
The product page describes the functions. The presets include editable target temperatures for nine types of meat with several doneness levels based on USDA recommendations, that is, the recommendation of a US authority; compare them with a German table, as the values can be changed. Each probe has its own target temperature and its own notification. The alarm sounds when the target is reached and when the smoker runs low on fuel, with a pre-alarm 5, 10 or 15 degrees beforehand. There is a HI/LOW alarm for the ambient temperature in the smoker. Besides the timers, there is a cook time estimator, which shows the remaining time to the target temperature, and a chart of the temperature curve in real time. According to the product page, the app is free.
Battery, safety and disposal according to the manual
The transmitter contains a built-in 3.7 V lithium battery, charged via the USB port on the back (DC 5 V). The device needs no batteries. On page 5 of the booklet, the manual devotes a separate section with seven points to the battery, here in our translation:
- Risk of fire, explosion and burns.
- Do not open, crush, puncture or take apart.
- Do not short-circuit and do not expose to water.
- Do not heat above 140 °F (60 °C) and do not incinerate.
- Charge only with the specified charger and follow the manufacturer’s instructions.
- Do not use if the battery is damaged or swollen.
- Dispose of properly according to local regulations.
Gas, installation location, clearances and hot probes do not appear in the manual, as it is a thermometer. As a general rule, even though TempPro does not write it: probes and cables are hot after cooking, and you need a grill glove to pull them out.
Something follows from point 4 for the installation location, or so we read it. The limit of 60 °C applies to the battery in the transmitter. Whether the outer wall of a running smoker or the lid of a kettle grill stays below it, we do not know. We would therefore not attach the transmitter to the lid or firebox, even though Amazon mentions a magnetic back, but place it on a cart, table or hook.
According to the manual, the electrical device does not belong in normal household waste but at an approved collection point or the local recycling centre; the applicable regulations must be observed, and if in doubt you ask your municipality.
What is missing from the documentation
We did not find the following, whether on the product page, in the manual or in the Amazon catalogue:
- the weight of the transmitter and probes (the 570 g in the US catalogue is shipping weight);
- battery capacity in mAh, runtime per charge and charging time;
- a protection rating (IP class) for the transmitter and probes, plus a statement on immersion, dishwasher use and deep frying;
- cleaning instructions specifically for the TP25;
- the material of the housing, display cover, cable sheath and probe handle, as well as probe diameter and insertion depth;
- the component behind the statement Heat Resistant to 716 °F and the continuous load capacity of the cable and plugs;
- response time and measuring interval of the probes;
- whether the transmitter sounds an alarm without the app;
- the unit of the pre-alarm (5, 10 or 15 degrees);
- whether the app requires an account, the minimum version for Android and the number of smartphones that can be paired at the same time;
- whether readings are caught up after a connection drop;
- the market launch of the TP25;
- an explicit statement of origin in the text (the manual’s back-page drawing shows a Made in imprint with the country word cut off, beginning with Chin);
- an EU authorised representative or importer, as only Shenzhen Ecare Electronics and a US customer service are named;
- a German instruction manual and warranty terms for purchases in Germany;
- a German manufacturer shop and a euro price from the manufacturer, as TempPro itself sells only in US dollars.
What else is worth considering?
| Model | The difference | Price | Our rating | Choose this if |
|---|---|---|---|---|
| ThermoPro TP25 (this one) | 4 wired probes, 200 m radio according to TempPro | approx. €37 | 8.4 | you need four measuring points and want a long radio distance outdoors |
| Inkbird IBT-4XS | up to 4 wired probes, 46 m radio according to Inkbird | approx. €60 | 8.8 | you stay within sight and want a stated battery runtime |
| ThermoPro TempSpike Twin | 2 wireless probes, booster with display | approx. €63 | 8.9 | you want no cables on the meat and cook two pieces at most |
| MEATER 2 Plus | 1 wireless probe without display, ambient up to 550 °C | approx. €118 | 9.5 | you mostly cook one piece and want to sear over the embers with the probe left in |
The prices are guide values from the price fields on our review pages; the amount in the shop is what counts. The rating is our editorial assessment based on manufacturer details and not a measurement result; we have not handled any of the four devices.
Who it suits: when the TP25 fits and when it does not
The number of measuring points counts first. The TP25 has four, and the ambient temperature takes up one of them. For a large piece with cooking chamber control, two probes are enough. Four are worthwhile when several pieces cook at the same time. TempPro names as its target groups weekend smokers with several pieces (brisket, ribs, chicken, shoulder), hosts with many dishes (turkey in the oven, ham on the grill) and cooks who want to know exactly when to take the food out. As places of use, the product page lists oven, grill, smoker, air fryer, rotisserie and pan.
According to TempPro, the TP25 is not ideal for anyone who wants wireless probes; for a cable-free solution the manufacturer points to the TP862B. For the rotisserie it also warns, although it lists it among the places of use: wired probes can get tangled there.
On cost, at approx. €37 the TP25 is at the lower end of our table. The Inkbird IBT-4XS costs €23 more, but states 1000 mAh and about 20 hours of runtime (elsewhere on the same page it says 25 hours) and scores 8.8 rather than 8.4 points in our catalogue. Its radio range is, as described above, clearly shorter. The ThermoPro TempSpike Twin is around €26 above the TP25, and the MEATER 2 Plus €81. Our assessment: if you want the battery runtime in black and white, you pay the €23 for the Inkbird.
If you want to read along indoors from the garden, Bluetooth is at a disadvantage: for overnight sessions, our grill thermometer buying guide names a Wi-Fi connection or a base station with its own display as the more stable solution. Steaks that you sear need a different strategy than the permanent probe: you cook them indirectly until just before the target, pull the probe and briefly put them over the embers. How to set up two zones for this is explained in the guide to direct and indirect heat.
The TP25 is the wrong choice for anyone who mainly grills thin steaks and sausages directly over the embers. Such pieces are done in minutes, a setup with four cables is hardly worth it for them, and there are instant-read thermometers for quick measuring. We would choose the TP25 if several pieces cook at the same time on the smoker or kettle grill, you can run the cable out under the lid, and you do not need range through walls.
