Recommended Specifications, Structures & Selection Guide

Air fryers operate at high temperatures and require precise, stable thermal control to ensure:

• Even cooking performance

• Fast heating response

• Over-temperature protection

• Long-term reliability

An NTC temperature sensor is the most commonly used solution due to its high sensitivity and cost efficiency.

1️⃣ Recommended Electrical Parameters for Air Fryer

Below are typical specifications used by most air fryer manufacturers:

✔ Recommended Resistance (R25)

Most popular option:
👉 10KΩ ±1% at 25°C

✔ B Value (B25/50 or B25/85)

• 3435K

• 3950K

• 3977K

For air fryer applications,
👉 3950K ±1% is widely used.

✔ Operating Temperature Range

• -40°C to 250°C (standard probe type)

• Custom high-temperature version up to 300°C

Typical air fryer internal working range:
80°C – 230°C

✔ Accuracy Recommendation

• ±1% (standard industrial control)

• ±0.5% (high-end smart air fryer)

• ±0.1°C achievable with calibration

2️⃣ Recommended Structural Types

Depending on installation design, different sensor structures are used:

🔹 Stainless Steel Probe Type (Most Recommended)

• SUS304 / SUS316 housing

• Waterproof & oil resistant

• Suitable for heating chamber monitoring

• High mechanical strength

Ideal for premium air fryer brands.

🔹 Epoxy Coated NTC

• Cost-effective

• Small size

• Used in internal PCB or air duct sensing

Suitable for entry-level products.

🔹 Glass-Sealed High Temperature NTC

• High stability

• Excellent long-term reliability

• Resistant to humidity and thermal shock

Recommended for high-temperature heating element protection.

3️⃣ Recommended Mechanical Options

We can customize:

• Probe diameter: 3mm / 4mm / 5mm / 6mm

• Probe length: 10mm – 5000mm

• Cable type: PVC / Silicone / Teflon (high temperature)

• Connector type: JST / Molex / Customized

• Response time: < 5 seconds (depending on design)

4️⃣ Why Air Fryer Manufacturers Choose NTC

✔ Fast response to temperature changes
✔ Stable resistance curve
✔ Cost-effective for mass production
✔ Easy integration with control PCB
✔ Long service life under high heat cycles

Final Recommendation for Air Fryer Projects

If you are developing or upgrading an air fryer, we recommend:

10KΩ ±1% / B3950K / Stainless Steel Probe / Teflon Wire

This configuration balances:

• Accuracy

• Durability

• Cost control

• Production scalability

📩 Need samples or a customized NTC temperature sensor for your air fryer project?
Send us your required R25, B value, working temperature, and installation drawing — our engineering team will recommend the best solution.