Phormula KS-4 Knock Monitor | 0-5V Knock Datalogging & External Trigger
Monitor, log and respond to engine knock. The Phormula KS-4 combines a live LCD knock display with audible and visual alerts. Its configurable 0–5 V analogue output lets compatible ECU, dyno or laptop inputs log knock activity alongside other tuning data. An external trigger can activate a suitable warning device or support a configured ECU strategy.
Why choose the KS-4?
- Current and maximum knock readings with bar graph and numeric LCD display
- Audible and visual knock warnings for in-car monitoring
- Configurable 0–5 V output, with output rates up to 100 samples per second
- External trigger for a warning light or compatible control strategy
- Configurable knock frequency from 6 to 9 kHz
- Handheld use or permanent dashboard mounting
Kit contents and setup
Phormula lists a Bosch wideband knock sensor, 3 metre sensor cable, sensor plug, shielded signal cable, mounting kit and wiring loom with the KS-4. Mount the sensor to a suitable engine block location, route the cable away from electrical interference, and configure frequency, gain and alert thresholds for the engine. Check the manufacturer's KS-4 information and installation manual before wiring outputs.
Best for: tuners who want live warnings plus knock data in an ECU, dyno or logging workflow. For an LCD warning system without 0–5 V output, see the KS-3. For audio listening as well as KS-4 logging, see the Professional Tuning Solution.
Learn why real knock detection matters during engine tuning, or compare the Phormula range. EDO Performance stocks Phormula in the USA and ships worldwide.