CHT Sensor
Fly Henry Spark Plug Ring CHT Sensor
Engineered specifically for Paramotors (PPG), Microlights, Trikes, and Ultralight aircraft, this under-spark-plug ring CHT probe provides direct, rapid-response cylinder head thermal monitoring. Built with high-temperature insulated leads and available in 10 mm or 14 mm ring diameters with 50 cm or 80 cm cable lengths to match your exact engine and airframe installation.
Choosing Your Variant
Please verify your spark plug thread diameter and installation cable run before ordering:
| Ring Size Option | Spark Plug Compatibility | Typical Engine Applications |
|---|---|---|
| 10 mm Ring Diameter | 10 mm thread spark plugs (e.g. NGK "C" series: CR8E, CR9E) | Vittorazi Atom 80, Moster 185, EOS 100/150, Minari, and compact 2-strokes |
| 14 mm Ring Diameter | 14 mm thread spark plugs (e.g. NGK "B" series: BR8ES, BR9ES, B8ES) | Rotax 447, 503, 582, Simonini, Polini Thor, Hirth, and larger aircraft engines |
50 cm Harness Length
Ideal for close-coupled paramotor setups where the Fly Henry sensing module or engine hub is mounted directly to the engine backplate, redrive frame, or upper harness spar. Keeps wire routing tidy with zero excess loops.
80 cm Harness Length
Designed for aircraft with longer routing paths—such as trikes, dual-cylinder heads, or installations where the sensing unit is positioned inside a protected cockpit pod or behind an engine bulkhead.
Features & Reliability
Built specifically to withstand high vibration and harsh thermal environments:
Immediate Thermal Response
Captures cylinder head temperature changes in seconds, giving the pilot immediate warning of fuel starvation, partial carburettor clogging, or detonation before catastrophic piston seizure occurs.
Low-Profile Fitment
The slim thermocouple washer installs directly underneath the spark plug. It securely clamps against the head casting without binding threads or altering spark plug reach into the combustion chamber.
Heat-Resistant Sleeving
Protected along its full length with high-temperature fibreglass sleeving to prevent melting, short circuits, or mechanical chafing against engine fins and vibrating frame tubes.
Universal EIS Compatibility
Fully compatible with Channels 1 through 4 of the Fly Henry Fly Meter, while functioning seamlessly on other general experimental avionics and standalone CHT gauges.
Technical Specifications
| Sensor Architecture | Under-spark-plug ring thermocouple probe |
| Available Ring Sizes | 10 mm (M10 spark plugs) & 14 mm (M14 spark plugs) |
| Available Harness Lengths | 50 cm (approx. 20″) & 80 cm (approx. 31.5″) |
| Operating Temperature Range | 0°C to 1,000°C (32°F to 1,832°F) continuous probe rating |
| Cable Insulation | High-temperature braided fibreglass sleeve (300°C+ continuous) |
| Instrument Compatibility | Fly Henry Fly Meter (Channels 1–4) & standard thermocouple displays |
| Target Aircraft | Paramotors (PPG), Microlights, Trikes, and Ultralight aircraft |
| Manufacturer / Brand | Fly Henry |
|---|---|
| Part Number / SKU | CHT5010 |
| Fitment Type | Aviation Standard Fitment |
Technical Inquiry for CHT Sensor
Confirm wiring loom compatibility, panel depths, or kit lead times with our engineering team.