Our knock sensors are designed to respond to knock frequencies up to 1000 Hz accommodating shifts in engine knock frequency making it a more flexible sensor responding to correct engine knock over a broad range of vehicle conditions. Manufacturing processes include an automated data acquisition system to continuously monitor the sensor output to ensure that it responds with appropriate voltage output at the specified frequency range. All units are 100% tested using an accelerometer vibration test to ensure trouble-free operation. Featuring the broadest sensor coverage in the market, we meet the service professionals needs with the highest quality product every time he opens the box.