What is RFX?
RFX is a wireless temperature monitoring system for BBQs and roasts, designed for cooks who want continuous monitoring without sacrificing accuracy or reliability.
Unlike many Bluetooth-only systems, RFX uses radio-frequency technology designed for long-range, reliable monitoring during long cooks.
Why choose RFX?
- Reliable RF wireless technology
- Monitor meat and pit temperatures simultaneously
- Get alerts wherever you are
- Works alongside Thermapen ONE
- Built by temperature measurement experts
Why wireless monitoring matters
Overnight cooks
Leave low-and-slow cooks like briskets and pulled pork overnight without worry.
Lid-closed monitoring
Know what’s going on without opening your BBQ lid. Keep the heat and flavours in.
Maintain stable temperatures
Opening your BBQ lid or oven door causes fluctuations that can spoil your meat.
Dual temperature tracking
Monitor both meat and pit temperatures for consistently juicy results.
Remote alerts
Get an alert on your phone or tablet as soon as your food is cooked.
Why cooks use Thermapen + RFX together
RFX continuously monitors your cook from start to finish, while Thermapen ONE gives instant spot checks anywhere in the food. Together, they provide both live monitoring and instant verification for consistently accurate results.
25% OFF
Sale
RFX Starter Kit with 1 Probe
RFX Starter Kit with 1 Probe
£144.00
Sale price
£144.00
Regular price
£192.00
RFX wireless thermometer
Monitors meat as it cooks. Keep track wherever you are.
Ideal for:
BBQ meats
Low and slow
Sunday roasts
Large joints
Big steaks
Rotisserie
Overnight cooks
19% OFF
Sale
Thermapen® ONE Thermometer
Thermapen® ONE Thermometer
£63.00
Sale price
£63.00
Regular price
£78.00
Thermapen instant-read probe
Verifies every dish is perfectly done throughout.
Ideal for:
Pan frying
Searing
Spot checking
Deep frying
Steaks
Fish
Small cuts
“Thermapen and RFX are the only meat thermometers I trust. ”
— The Smokin’ Elk
Why RF instead of Bluetooth?
Most wireless meat thermometers use Bluetooth to transmit readings to a device.
RFX is different.
RFX uses radio frequency (RF) to send readings to a wireless receiver. From there, readings are sent to your device using WiFi or Bluetooth.
Why RF enables seamless meat monitoring
Stronger signal
Blasts through walls, ovens and BBQs without dropouts.
Longer Range
Monitor over long distances, uninterrupted.
Pair once, then never again
Stays connected forever once set up.
“Ceramic grills, oven walls and long distances are all environments where low-power Bluetooth signals can struggle. RF technology is much better suited to these conditions.”
— Jason Webb, Managing Director of Thermapen & Electronic Temperature Instruments Ltd
RFX Wireless Range, Tested
Ceramic BBQ test
The Smokin’ Elk put his RFX MEAT probe inside a Kamado Joe JR, then placed the BBQ inside a Kamado Joe Big Joe. He then put his RFX GATEWAY inside another Kamado Joe, and set the two around 40 metres apart. The result? Seamless monitoring through three ceramic walls.
Kettle BBQ test
The Smokin’ Elk put his RFX MEAT probe inside a metal kettle BBQ, and his RFX GATEWAY inside another kettle BBQ, and set the two around 40 meters apart. Once again, RFX delivered seamless readings to his device.
Best uses for RFX
The recipes you can perfect with wireless monitoring.
Low and slow
Smoke brisket and pork overnight using RFX as your guide. Get notified if your pit temperature drops, and when it’s time to wrap.
Steak
Track the whole process — from the slow smoke to the finishing sear to the all-important rest — getting it exactly how you want.
Sunday roasts
Whether you’re cooking roast chicken, lamb, beef or pork — wireless tracking helps you get it just right. Perfect for feeding a crowd.
Multi-cook feasts
Track up to 50 RFX MEAT wireless probes at once. Build your collection to monitor steaks, chicken, and slow cooks all at the same time.
“I've used probes for years that constantly disconnect when the lid is down or in the oven. No issue with the RFX at all. I started smoking a brisket at 6 am, went back to bed, and could still monitor the cook. The results were amazing.”
— Mike L
Why cooks trust RFX and Thermapen
For decades, Thermapen has been trusted by professional chefs, food manufacturers, BBQ enthusiasts and home cooks who care about getting temperatures right.
Unlike many cooking gadget brands, temperature measurement is our expertise. Electronic Temperature Instruments (ETI), the company behind Thermapen, has been designing and manufacturing thermometers since 1983.
That same focus on accuracy and reliability is built into every product we sell, including RFX.
Built by experts
RFX was developed by Thermoworks, Thermapen's US partner and a recognised leader in temperature measurement technology since 1997.
Together, ETI and Thermoworks have spent decades helping professionals measure temperature with confidence.
Serious precison
When cooking meat, accuracy matters. A few degrees can be the difference between an overcooked steak or an undercooked chicken.
That's why Thermapen and RFX are engineered for accuracy, consistency and dependable performance in every cook.
Trusted by pros
From competition BBQ teams to passionate home cooks, Thermapen products have earned a reputation for delivering reliable results.
Whether you're smoking a brisket, roasting Christmas turkey or grilling steaks for guests, you need trusted temperatures.
UK support team
When you buy from Thermapen, you're backed by a UK team with decades of temperature expertise, product knowledge and customer support experience.
We're passionate about helping cooks get better results through accurate temperature measurement.
RFX FAQs
What is RFX?
RFX is a wireless meat thermometer made by Thermoworks and sold by Thermapen in the UK. It’s used to track core meat and pit temperatures from your device without opening your oven or BBQ.
How does RFX work?
Insert the RFX MEAT probe into your meat.
Monitor the temperature in the ETI app.
Get an alert when your food is ready.
Optional: Monitor pit temperature using the included Pro-Series Air Probe.
See the RFX User Guide for more information.
Is RFX accurate?
RFX is very accurate. Here's why:
Designed by Thermoworks
Created by Thermapen’s US partner, Thermoworks. A trusted brand since 1997.
±0.5 °C certified high accuracy
The precision Thermoworks and Thermapen are known for. Be confident your meat is safe and delicious.
Multi-sensor technology
Four sensors locate the thermal centre of your cook for precise results.
Engineered for wireless power
Specifically designed to deliver uninterrupted readings in real-life cooking scenarios.
Built for durability
Withstands ambient temperatures up to 538 °C. Fully waterproof and dishwasher safe.
Should I get an RFX or a Thermapen?
RFX and Thermapen work together to create perfectly cooked food. Track meat wirelessly with RFX, and spot check all over with Thermapen.
If you want just one to start:
- RFX is ideal for cooking low and slow, BBQs and roasting joints.
- Thermapen is great for smaller, fast-cooking meats like steaks, wings, sausages and fish.
Shop the RFX Thermapen bundle to save on both.
Which RFX kit should I buy?
RFX starter kit — Everything you need to get started. One probe for single-item monitoring. You can buy separate RFX MEAT probes later if you want to scale up your kit.
RFX multi-probe kits — Two and four probe kits for tracking multiple meats at once.
RFX Billows kit — Designed for low and slow. The Billows BBQ fan keeps your pit temperature steady.
RFX Thermapen kit — Your two essential meat thermometers in one kit. Wireless tracking and instant-read checks covered.
Can RFX monitor both meat and pit temperature?
Yes, RFX monitors meat and pit temperatures. The RFX GATEWAY comes with a wired Pro-Series air probe that clips onto your grill grate for accurate pit monitoring. Track both temperatures in the ETI app and set high/low alerts.
What smartphone app goes with RFX?
The ETI app pairs with RFX for wireless meat temperature monitoring. Graph your cooks, set high/low alerts, and get push notifications.
Do wireless thermometers lose connection?
Some wireless thermometers lose connection because they use Bluetooth to transmit readings, and signals can struggle to penetrate thick objects like ceramic BBQ lids, ovens and walls.
RFX is built with RF (radio frequency) technology, which is much more powerful and transmits through thick objects without dropouts. The Smokin’ Elk tested his RFX through three layers of ceramic BBQ walls, and it still delivered flawless readings!