BOSCH KS4-P knock sensor 0261.231.188-U5G

Discover the BOSCH KS4-P knock sensor 0261.231.188-U5G, an essential device for detecting structure-borne vibrations in spark-ignition engines caused by uncontrolled combustion. Due to the inertia of its seismic mass, engine vibrations induce movement of the sensor, generating a compressive force. This force is then converted into an electrical signal by a piezoceramic element, allowing precise voltage thresholds corresponding to acceleration amplitudes to be established.

Designed to withstand the most extreme conditions, this sensor stands out for its robustness, compact design and high precision in detecting structure-borne noise. Its optimised format integrates the connector directly into the housing, ensuring reliable performance even in the most demanding environments.

• Frequency: 3 to 25 kHz
• Sensor head height: 18 mm
• Male thread (for casting): M8x25
• Male thread (for aluminium): M8x30
• Tightening torque: 20 ± 5 Nm