Heating strip

platewaferceramic

Product overview
Planar ceramic heaters for oxygen sensors (lambda sensors) are ceramic heating elements designed to reach operating temperature rapidly and ensure reliable sensor response under high exhaust-gas conditions. Available in conventional switch, pump-current (XF), air–fuel ratio and wide-range configurations, they support engine management and exhaust after-treatment systems.

Key characteristics

• Fast light-off time (≤12 s).
• Good electrical insulation at high temperature (≥1 MΩ @800℃).
• High resistance to elevated temperature and poisoning.
• Long operational lifetime under cyclic thermal loads.
• Multiple types available: conventional switch, pump-current/XF, air–fuel ratio and five-wire wide-range.

Applications

• Automotive engine management systems (oxygen sensor heaters).
• Motorcycle exhaust after-treatment systems.
• Thermal surface igniters and hot-air generation.
• Tool heating, melting and soldering equipment.
• Chemical analysis and laboratory instrumentation.
• Environmental monitoring equipment.

Available types and typical electrical data

• Conventional switch type (e.g. INC-F01): typical heater resistance ≈ 9 ±1.5 Ω (variants exist from ≈4 Ω to ≈17 Ω), operating voltage 12–14 V, exhaust gas tolerance up to 800℃.
• XF / Pump-current types: typical heater resistance ≈ 3.0 ±0.5 Ω, operating voltage 7–9 V; signal output may require a small pump current (microamperes).
• Air–fuel ratio types (e.g. INC-U01): low resistance ≈ 2.1 ±0.3 Ω, specified for A/F reference conditions.
• Five-wire wide-range types (e.g. INC-U02 / INC-U03): typical resistance ≈ 3.0–3.4 Ω, available with different bias currents (e.g. Ip = 4–6 mA).
• Typical dynamic behavior: Rich↔Poor response (600→300 mV) ≤150 ms; Poor↔Rich (300→600 mV) down to ≤60 ms for some XF types.

Dimensions and representative models

• INC-F01 cores examples: BS 58.6 mm (R ≈ 9 Ω); DE / DF / DG variants 54.0 mm with resistances from ≈6 Ω to ≈13 Ω; XF core 36.5 mm (R ≈ 3.0 Ω).
• Air–fuel and wide-range examples: INC-U01 (AF / AG cores ≈46.2 mm, R ≈ 2.1 Ω); INC-U02 / INC-U03 (UN / UB / UC cores 52–60 mm, R ≈ 3.0–3.4 Ω).
• Other variants: two‑wire MW core (≈30.0 mm) and compact MX/MY cores (≈27.0 mm) with higher resistances available.
• Sizes and resistances can be customized on request to match sensor assemblies.

Technical specifications

• Heater resistance (typical): Conventional ≈ 9 ±1.5 Ω; XF/pump-current ≈ 3.0 ±0.5 Ω; other variants per model.
• Operating voltage: Conventional 12–14 V; XF/pump-current 7–9 V.
• Exhaust gas temperature capability: values specified up to 800℃.
• Fuel-rich voltage (λ = 0.95–0.97): typ. 700–900 mV depending on type.
• Lean-burn voltage (λ = 1.05–1.10): typ. 20–50 mV depending on type.
• Response times: Rich→Poor ≤150 ms; Poor→Rich ≤100 ms (some XF ≤60 ms).
• High-temperature insulation resistance: ≥1 MΩ @800℃.
• Inductive resistance: general ≤500 Ω (specific @780℃ values apply for some types).
• Mechanical strength: three-point bending strength ≥400 MPa.
• Notes: Data are standard reference values; sizes and some electrical parameters can be customized. For pump-current types, apply the specified microampere-level pump current at the signal output terminal.