
Hehku One
4.78 (207)- Tells you when to take the food off the heat
- Follow on your phone, your watch or a shared link
- About 50 m range with the dock repeater
- Ceramic end takes 500 °C, battery lasts 36 hours
- Also measures ambient temperature (Gen 2)
The temperature inside the food decides the result, not the time on the clock. Here are the temperatures we cook to, and the ones the Hehku app suggests for you.
Each number is the temperature the food is ready at. Meat keeps warming after it leaves the heat, so it has to come off before it reaches the target. Wait until the thermometer shows the target and it will overshoot.
The Hehku app does this for you. Pick the food and the doneness, and the app estimates how much the temperature will still rise and alerts you in time to take the meat off the heat and start resting. The meat reaches the target while it rests.
| Food | Doneness | Target temperature | Note |
|---|---|---|---|
| Steak or roast | Rare | 51 °C | |
| Steak or roast | Medium rare | 54 °C | App default, the most popular |
| Steak or roast | Medium | 58 °C | |
| Steak or roast | Medium well | 64 °C | |
| Steak or roast | Well done | 70 °C | |
| Brisket | Smoked | 95 °C | Long smoke, connective tissue melts |
| Pulled beef | Extra well done | 96 °C | Pulling |
| Food | Doneness | Target temperature | Note |
|---|---|---|---|
| Pork chop or loin | Medium well | 68 °C | App default |
| Pork chop or loin | Well done | 71 °C | |
| Pork roast | Medium | 66 °C | App default |
| Ham and neck | Well done | 72 °C | Measure the thickest part, away from the bone |
| Christmas ham | Well done | 72 °C | |
| Pork shoulder | Well done | 75 °C | |
| Pulled pork | Extra well done | 96 °C | Long cook, pulling |
| Pork ribs | Smoked | 88–91 °C |
| Food | Doneness | Target temperature | Note |
|---|---|---|---|
| Chicken breast | Medium well | 72 °C | App default |
| Whole chicken | Well done | 74 °C | Measure the thickest part of the breast |
| Chicken leg, thigh and wings | Well done | 78 °C | Juicier than at breast temperature |
| Turkey breast or whole | Well done | 72 °C | |
| Turkey legs | Well done | 80 °C | |
| Duck breast | Medium | 58 °C | App default |
| Food | Doneness | Target temperature | Note |
|---|---|---|---|
| Elk and venison | Medium rare | 54 °C | App default. Very lean, do not overcook |
| Elk and venison | Medium | 60 °C | |
| Reindeer | Medium | 54 °C | App default |
| Wild boar and bear | Well done | 71 °C | Always cook through |
| Food | Doneness | Target temperature | Note |
|---|---|---|---|
| Leg of lamb or rack | Medium rare | 63 °C | |
| Leg of lamb or rack | Medium | 68 °C | App default |
| Food | Doneness | Target temperature | Note |
|---|---|---|---|
| Salmon fillet | Medium rare | 44 °C | App default, juicy |
| Salmon fillet | Medium | 48 °C | |
| Salmon fillet | Medium well | 55 °C | Default for a whole salmon |
| Rainbow trout and char | Medium well | 58 °C | App default |
| Zander and perch | Medium | 57 °C | |
| Pike and cod | Well done | 60 °C | App default |
| Food | Doneness | Target temperature | Note |
|---|---|---|---|
| Burger and meatloaf | Well done | 75 °C | Always cook through. No preset, use the Simple mode |
| Sausage | Well done | 72 °C | No preset, use the Simple mode |
The temperatures are the Hehku app presets, and you can adjust them in the app to your taste. Always cook poultry, minced meat, wild boar and bear through.
These are rough figures. The rise depends on the size of the cut, the target and the oven or grill temperature. The app estimates the rise and follows the temperature while the meat rests, so you do not have to guess. Rest it at room temperature, loosely covered with foil.
| Cut | Carryover rise | Resting time |
|---|---|---|
| Thin steak or fish fillet | 1–2 °C | 3–5 min |
| Thick steak or pork tenderloin | 2–4 °C | 5–10 min |
| Large roast, ham or whole bird | 4–8 °C | 15–30 min |
Push the probe into the thickest part. The tip reads the internal temperature, so it belongs in the centre.
Bone conducts heat and fat insulates, and both give a wrong reading. Keep the tip in the meat.
In a thin steak or fillet the tip will not reach the centre from above. Push the probe in horizontally from the side.
Pieces cook at different speeds. With the two probes of the Hehku Duo you can follow two pieces, or two spots in a large roast.
The surface is hotter than the centre, and the heat keeps moving inwards while the meat rests. In a large roast the rise can be several degrees. Take it off at the target and it overshoots.
The Hehku app alerts you when it is time to take the meat off the heat and start resting. The alert does not come a fixed number of degrees early: the app estimates the rise from the cut, the target and the oven or grill temperature. Slow-smoked cuts such as ribs have no carryover phase, so for them the alert comes at the target.
In a whole cut the bacteria are on the surface, and searing cooks the surface. Minced meat is different because the surface is mixed through it. Always cook minced meat to 75 °C.
The leg has more connective tissue, which only softens at a higher temperature. The breast dries out when taken far past 72–74 °C, while the leg is at its juiciest at around 78 °C.
Yes. The target is the same however you cook. In a slow cook the temperature rises less during carryover than it does after high heat.


Both models: 2-year warranty, 30-day returns and the free Hehku app.