GEFU GF21850
GEFU Digital Radio Roast Thermometer (Model GF21850) - Instruction Manual
Precision Cooking for Oven, Grill, and Stove
1. Vöru lokiðview
The GEFU Digital Radio Roast Thermometer provides precise temperature monitoring for various cooking methods, including oven, grill, and stove. This two-part system features a sender unit with a stainless steel probe and a portable receiver, allowing you to monitor cooking progress remotely. An alarm sounds when the desired temperature is reached, ensuring perfectly cooked meals.

Image 1: The GEFU Digital Radio Roast Thermometer, showing the main display unit, the long stainless steel probe, and its heat-resistant cable. The display unit is placed on a small, oval-shaped base.
2. Innihald pakka
- Digital Thermometer Display Unit (Receiver)
- Stainless Steel Probe with 39-inch Heat-Resistant Cable (Sender)
- Battery (2 AAA batteries required, included)
- Leiðbeiningarhandbók
3. Uppsetning og uppsetning
3.1 Uppsetning rafhlöðu
- Finndu rafhlöðuhólfið aftan á skjánum.
- Opnaðu hlífina á rafhlöðuhólfinu.
- Settu tvær AAA rafhlöður í og gætið þess að pólunin (+/-) snúi rétt.
- Lokaðu rafhlöðuhólfinu tryggilega.
3.2 Kannatenging
- Insert the stainless steel probe's jack into the designated port on the side of the display unit.
- Gakktu úr skugga um að tengingin sé traust.
3.3 Placement of the Display Unit
The display unit features magnets on its back, allowing it to be attached to metallic surfaces like an oven door or refrigerator. Alternatively, it can be placed on a countertop using its integrated stand.

Image 2: The GEFU Digital Radio Roast Thermometer display unit and probe in a kitchen setting. The probe is inserted into a piece of meat in a pan on a stove, while the display unit rests on the countertop, showing temperature readings.
4. Notkunarleiðbeiningar
4.1 Kveikt/slökkt
Ýttu á rofann til að kveikja eða slökkva á tækinu.
4.2 Val á hitaeiningu
Press the "MODE °C/°F" button to switch between Celsius and Fahrenheit temperature displays.
4.3 Stilling á markhitastigi
- Press the "MEAT S/S" button to cycle through pre-programmed meat types (Beef, Pork, Poultry, Ham, Fish) and doneness levels (Rare, Medium Rare, Medium, Well).
- Alternatively, use the "UP MIN" and "DOWN SEC" buttons to manually set a desired target temperature.
- Once the target temperature is set, the thermometer will monitor the internal temperature of the food.
- An audible alarm will sound when the food reaches the set temperature.
4.4 Tímamæliraðgerð
The device includes a timer function, allowing you to set a countdown for up to 99 minutes and 59 seconds. Use the "UP MIN" and "DOWN SEC" buttons to adjust the time. An alarm will sound when the timer expires.
4.5 Notkun mælisins
Insert the stainless steel probe into the thickest part of the meat, avoiding bone. The probe's heat-resistant cable allows the oven door to close while the probe remains inside the food, transmitting temperature data to the display unit.
5. Meat Temperature Guide
For optimal safety and taste, refer to the following internal temperature guidelines. Always verify temperatures with a reliable thermometer.
| Kjöt Tegund | Well (°C/°F) | Medium (°C/°F) | Medium Rare (°C/°F) | Rare (°C/°F) |
|---|---|---|---|---|
| Nautakjöt | 76°C / 170°F | 71°C / 160°F | 63°C / 145°F | 60°C / 140°F |
| Svínakjöt | 79°C / 175°F | |||
| Alifugla | 76°C / 170°F | |||
| Skinka | 58°C / 137°F | |||
| Fiskur |
Note: Always cook meat to safe internal temperatures to prevent foodborne illness. The provided table serves as a general guide.
6. Viðhald og umönnun
- Þrif: Wipe the display unit clean with a damp cloth. The stainless steel probe can be cleaned with warm soapy water. Do not immerse the display unit in water.
- Geymsla: Geymið hitamælinn á þurrum stað þegar hann er ekki í notkun.
- Skipt um rafhlöðu: Replace batteries when the display becomes dim or the device malfunctions. Dispose of used batteries responsibly.
- Meðhöndlun rannsakanda: Always use heat-resistant gloves when handling the hot probe or wire. Do not touch the hot probe with bare hands.
7. Bilanagreining
If you encounter issues with your GEFU Digital Radio Roast Thermometer, consider the following:
- Enginn skjár/rafmagn: Athugið hvort rafhlöðurnar séu rétt settar í og nægilega hleðdar. Skiptið um þær ef þörf krefur.
- Ónákvæmar lestur: Ensure the probe is fully inserted into the thickest part of the meat, avoiding bone. Verify the probe cable is securely connected to the display unit.
- No Alarm: Check if the target temperature is set correctly and if the alarm volume is audible.
- Poor Radio Range: The radio range (up to 66 feet) can vary based on environmental factors and obstructions. Try repositioning the display unit closer to the oven/grill.
8. Tæknilýsing
- Vörumerki: GEFU
- Gerðarnúmer: GF21850
- Skjár Tegund: Stafræn
- Tengingar: Radio (up to 66 feet range)
- Kanna efni: Ryðfrítt stál í matvælaflokki
- Lengd snúru: 39 inches (heat-resistant)
- Aflgjafi: 2 AAA rafhlöður (meðfylgjandi)
- Eiginleikar: Pre-programmed meat types and doneness levels, manual temperature setting, timer function, magnetic back, integrated stand.
- Vörumál: 7.48 x 4.53 x 4.13 tommur
- Þyngd hlutar: 6.3 aura
9. Ábyrgð og stuðningur
For warranty information, product support, or to purchase protection plans, please refer to the original product packaging or contact GEFU customer service. Protection plans are available for 3-year and 4-year durations, as well as a comprehensive monthly plan.
- Tveggja ára verndaráætlun: Fáanlegt til kaups.
- Tveggja ára verndaráætlun: Fáanlegt til kaups.
- Algjör vernd: Mánaðarleg áætlun sem nær yfir gjaldgeng kaup, bæði fyrri og framtíðarkaup.