Before purchasing, please contact TDP to confirm availability. PLEX items can sell out quickly, and lead times may be long.
Original Bosch Knock Sensor KS4-P (1 unit).
The KS4-P sensor is designed to detect structure-borne vibrations in spark ignition engines caused by uncontrolled combustion. Engineered for durability, it performs reliably even in extreme operating conditions.
Specification and compatibility
| Application | 3 to 25kHz |
|---|---|
| Operating temperature range | -40 to 150°C |
| Storage temperature range | -30 to 60° C |
| Max. Vibration | ? 800 m/s2 |
| Range of frequency | 3 t0 25 kHz |
|---|---|
| Sensitivity at 5 kHz | 26 ± 8 mV/g |
| Max. sensitivity changing (life-time) | -17 % |
| Linearity between 5 to 15 kHz (from 5 kHz value) | -10 to 10 % |
| Linearity between 15 – to 20 kHz (linear increasing with freq) | 20 to 50 % |
| Main resonance frequency | 30 kHz |
| Impedance | > 1 MOhm |
| Temperature dependence of sensitivity | 0.04 mV/g°C |
| DisplaCapacity field | 1,150 ± 200 pF |
Contact TDP to confirm compatibility, required accessories and lead time before ordering. Supplier availability is not stock held by TDP.





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