Published 7 July 2026 at 13:06
Commercial and home-based preparation of deli meats, smoked products, confectionery fermentation, and low-temperature sous-vide cooking share a common need: continuous temperature monitoring over hours to days. Traditional two-channel thermocouple thermometers solved this technology challenge in the year 2000 with separate sensors for air temperature (in the air phase of the oven or smoking chamber) and core temperature (inside the product itself). However, they were stationary instruments that operators had to check manually. Modern Bluetooth thermometers combine the same measurement quality with wireless range to a mobile app, dramatically changing the workflow.
What the ETI ThermaQ Blue Is
ETI ThermaQ Blue Bluetooth thermometer with 2 inputs for Type K is a dual-channel thermocouple thermometer with a built-in Bluetooth transmitter from the British company Electronic Temperature Instruments. The instrument:
- Has 2 inputs for Type K thermocouples.
- Features Bluetooth 4.0 (Low Energy) for connection to iOS or Android mobile devices.
- Has a range of up to 50 m line of sight (~10 m through walls).
- Includes a built-in backlit LCD for direct reading without a mobile device.
- Features 2 LEDs for visual alarm indication.
- Is IP65-rated for workshop use and wet environments.
- Uses the free ETI app for iOS/Android.
- Is delivered as a set with an oven probe and a penetration probe in a protective zippered case.
Basic specifications:
- Number of channels: 2 (Type K thermocouples)
- Measurement range: -100 °C to +300 °C (probe-dependent, up to +1300 °C for high-temperature probes)
- Accuracy: ±0.4 °C (instrument) plus probe accuracy
- Resolution: 0.1 °C
- Wireless range: ~50 m line of sight
- Protection class: IP65
- Battery: 2× AAA, ~500 hours of operating time
- Display: Backlit LCD showing both channels simultaneously
- App support: iOS 10+ and Android 5+
- Data export: CSV (Excel-compatible) via mobile app
- Alarms: Programmable high/low limits per channel, with visual + push notification
Why Two Channels Are Standard for Food Preparation
Classical temperature diagnostics in smoking and slow cooking use two parallel measurement points:
Chamber temperature (ambient): The air temperature in the smoking chamber/oven. Determines the process speed and surface drying of the product.
Core temperature: The temperature inside the product itself. Determines when cooking is complete according to food safety tables.
The difference between the two (delta) indicates where in the process the product is:
- Large delta (100-150 °C): The chamber is hot, the core is still cold. Early phase.
- Medium delta (40-100 °C): The core temperature is rising rapidly. Middle phase.
- Small delta (5-15 °C): The core is approaching the chamber temperature. Final phase.
Without both measurements simultaneously, the operator cannot know which phase the process is in. This is particularly critical in low-temperature cooking (65-85 °C oven temperature) where the process timeline is very slow.
Bluetooth Range in Practice
The specified range of 50 m applies to line of sight without obstacles. Practical scenarios:
- Line of sight outdoors: 50-70 m range. Connection stable.
- Through one concrete wall: 15-25 m range. Connection stable.
- Through multiple walls/floors: 5-10 m range. May experience interruptions.
- Through steel construction (e.g., professional smoking chamber): Best to mount the mobile device or a repeater router outside the chamber.
In practice: a cook smoking brisket in the garage can sit in the living room and monitor the process on their mobile device. A restaurant chef can leave the kitchen to pick up supplies without losing monitoring.
App Features That Change the Workflow
The ETI app (free, iOS/Android) provides:
- Real-time graph: Both channels on the same time axis. Visualizes the thermal gradient.
- Programmable alarms: High limit per channel (e.g., push notification when core temperature reaches 63 °C for medium-rare beef, or 74 °C for fully cooked poultry).
- Low limit alarms: Detects if the chamber has cooled down (e.g., propane ran out, wood burned out).
- Data history: All sampled values are stored. Can be exported as CSV for analysis.
- Notes: Text comments timestamped (“cooked meat in smoking chamber”, “flip the meat”, “added more wood”).
- Multiple devices: One mobile device can connect to several ThermaQ Blue units simultaneously.
Temperature Standards for Food Safety (HACCP)
Food safety standards specify minimum core temperatures for killing pathogenic bacteria:
- Poultry (chicken, turkey, duck): ≥74 °C for 15 seconds.
- Ground meat (beef, pork): ≥68 °C for 15 seconds or ≥63 °C for 3 minutes.
- Whole beef cuts (steak, roast): ≥54 °C (rare) up to customer-desired doneness.
- Fish: ≥63 °C for 15 seconds (or deep-frozen according to HACCP plan).
- Eggs (in mass form): ≥71 °C for 15 seconds.
- Reheated/hot-held food: ≥63 °C continuously.
The ThermaQ Blue’s programmable alarms allow the operator to set the target temperature according to the HACCP plan and receive a push notification when the limit is reached. Data export documents that the process was actually carried out according to plan — which HACCP audits require.
Where a Bluetooth Thermometer Makes a Real Difference
Commercial smoking (deli meats, grill restaurant): Slow-cooked brisket and pulled pork take 12-16 hours. Overnight monitoring makes this possible.
Restaurant sous-vide: Low-temperature circulating water bath. Core temperature combined with water temperature shows when the product is ready.
Home grilling and smoking: A grill master can sit in the living room and monitor without opening the grill (each opening takes 10-15 minutes off the cooking time).
Cheese making and fermentation: Constant chamber temperature (10-15 °C) for weeks. Alarms if cooling fails.
Deli meat fermentation and salami: The air temperature and humidity in the dry-aging room are critical. Combination with an RH sensor (separate instrument) provides complete monitoring.
Sourdough and rye bread: Bulk fermentation at 24-28 °C over 12 hours. Alarms for too high/low temperature.
Yogurt and pickling process:: Fermentation at controlled temperature. Data logging provides product QC.
Brewing and distillation:: Fermenter and pot still temperature during 24-48 hour distillation.
Insect farming (mealworms, crickets):: Chamber temperature for optimal growth.
Clinical and scientific incubators:: Verification that the incubator maintains specification. Remote monitoring from the office.
What You Get for the Money
ETI ThermaQ Blue Bluetooth thermometer with 2 inputs for Type K thermocouples, measurement range -100 to +300 °C (up to +1300 °C with high-temp probe), ±0.4 °C accuracy, 0.1 °C resolution, Bluetooth 4.0 LE range ~50 m line of sight, IP65 water and dust tightness, backlit LCD showing both channels simultaneously, 2 LEDs for alarm indication, 2× AAA battery (~500 h operation), free ETI app for iOS/Android with real-time graph, programmable alarms and CSV export, traceable calibration certificate, protective case with oven probe + penetration probe included in the set.
2,424 SEK is the instrument investment. Compared to a simpler dual-channel thermometer without Bluetooth (500-1,200 SEK, no remote monitoring), the ThermaQ Blue provides critical time savings during long processes plus HACCP documentation. Compared to industrial remote monitoring systems with Wi-Fi (5,000-15,000 SEK, complex installation), the Bluetooth solution is a portable plug-and-play version that works without Wi-Fi infrastructure.
Read more: ETI ThermaQ Blue Bluetooth thermometer in the shop →
