PLEX KNOCK MONITOR® V3
Never Miss Knock Again.
High-fidelity, professional knock detection system designed for data-driven tuners and engine calibrators. Helps you optimize engine performance and durability while safeguarding against destructive tuning.
PLEX KNOCK MONITOR®V3
INVEST IN EXCELLENCE.
“A revolutionary knock detection and analysis system that is more than just a tool—it’s an investment in precision, reliability, and superior results. Built for data-driven tuners who know that investing in the right tools pays dividends in performance and lasting excellence.”
With over 12 years of expertise behind it, the PLEX KNOCK MONITOR® V3 combines cutting-edge hi-fidelity audio filtering, superior knock event detection, and advanced PC-based cross-analysis tools. Our proprietary algorithm ensures faster, more accurate detonation analysis, empowering you to push the limits with confidence.

WHAT'S NEW? EVERYTHING.
POWERFUL PROCESSOR
ADVANCED KNOCK
DETECTION SETTINGS
DEDICATED MULTI-CORE DSP
ENHANCED PER CYLINDER DETECTION
HIGH FIDELITY
AUDIO FILTERING
ENGINE POSITION
SIGNAL DECODING
ENTIRELY CONFIGURABLE
100Mbit ETHERNET
INDUSTRIAL M8 CONNECTORS/
WIRING SYSTEM
POWERFUL PC ANALYSIS SW
FULLY CONFIGURABLE
RGB LED LIGHTS
CAN BUS DATA LOGGING
INDUSTRIAL QUALITY
MEMBRANE KEYPAD
2.8” ULTRA BRIGHT IPS DISPLAY
BUILT TO LAST
KEY APPLICATION AREAS
Knock detection is a critical aspect of modern engine management and performance tuning. It involves identifying and analyzing abnormal combustion events, commonly known as “knock” or “detonation,” which occur when the air-fuel mixture ignites prematurely or unevenly within the engine cylinder. Left unchecked, knock can lead to significant engine damage, reduced efficiency, and compromised performance.
Engine knock detection plays a critical role in various automotive and industrial applications and is essential for anyone involved in engine tuning, maintenance, and development, ensuring optimal performance, efficiency, and longevity.
A Future-proof,
Cutting Edge Hardware.
We have literally built the new PLEX Knock Monitor from scratch, leveraging the latest advancements in electronics and signal processing to ensure unmatched performance and reliability. Designed with scalability and future updates in mind, the hardware is ready to adapt to evolving technologies and user needs. Whether you’re tuning engines today or preparing for the challenges of tomorrow, this is the tool that keeps you ahead of the curve.
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.


ENGINE & SENSORS SETUP

CRANK TRIGGER SETUP

KNOCK THRESHOLD CALIBRATION
EASY TO NAVIGATE
SETUP TREE INTERFACE
COMMON USER INTERFACE
FOR ALL PLEX DEVICES
WYSIWYG DASH PAGE
LAYOUT DESIGN
TRULY FAST CONFIGURATION
REAL-TIME CAN MSG STREAMING
BUILT-IN TEMPLATES

WAVEFORM GRAPH

FREQUENCY SPECTOGRAM

KNOCK vs RPM
CUSTOMIZABLE UI
FAST KEYBOARD SHORTCUTS
MULTIPLE GRAPHS & PANELS
EASY FILE COMPARISON
LIVE DATA UPDATING
SMART TUNING MAPS
KNOCK MONITOR VERSION COMPARISON
![]() |
![]() |
![]() |
|
KNOCK MONITOR V2 | KNOCK MONITOR V3 | PLEX KNOCK MONITOR V3 | |
(Discontinued) | Basic Version | HD Version | |
Custom CAN BUS | -- | ||
Knock Sensor Inputs | 1-2 | 2 | 2 |
Detection per Cylinder | up to 8 | Up to 16 | Up to 16 |
Knock Threshold | 2D | 2D | 2D + Advanced |
USB Datalogging | -- | ||
Ethernet | -- | -- | |
# Data Channels | Only Knock | 64 | 256 |
Engine Position Inputs | -- | RPM only | |
Gain per Cylinder | -- | -- | |
Gain per Sensor | -- | -- | |
Knock Windowing | -- | -- | |
Real-time FFT | -- | -- | |
Configuration SW | Own (limited) | PLEX Device Manager V2 | PLEX Device Manager V2 |
Analysis SW | -- | PLEX PDA-WIN V2 | PLEX PDA-WIN V2 |
Connectors | JWPF | M8/DTM/JWPF | M8/DTM/JWPF |
DETAILED SPEC

Dimensions (mm) | w 132 x h 76 x d 126 |
---|---|
Weight | 250g |
Connector(s) | M8 Power/CAN M8 Knock Signals M8 Trigger/In-Out/5V-sgnd |
Material | CNC machined aluminum |
Sealing/Ingress Protection | IP5x |
Supply Voltage Range | 9-30V DC |
---|---|
Current Consumption | max. 2A at 12V |
Temperature Range | -20 to +60 degC |
Type | RGB TFT IPS Wide-Temp |
---|---|
Size (px) | 240 x 320 |
Brightness | 900cd |
Refresh Rate | 50Hz |
CAN Bus | 1x |
---|---|
USB-C | 2 (for configuration/streaming & logging) |
Ethernet | 100Mbit (HD version only) |
Knock/Vibration Sensor | 2x |
---|---|
Analog Inputs 0-5V | 2x (shared) |
Digital Inputs 0-5V | 2x (shared) |
Engine Position/Trigger VR/hall Inputs | 2x (HD version only) |
Analog Outputs 0-5V | 2x (shared) |
LEDs | 4x RGB (configurable) |
Real Time Clock | with battery backup |
---|---|
Device/Sensor Voltage Monitor | +12V supply/+15V sensor supply |
Device Temperature Sensor | Yes |
Ambient Light Sensor | — |
Memory | USB flash drive or PC Logging |
---|---|
Max. Log Rate |
|
Max. Data Channels | 64 (Basic), 256 (HD) |
---|---|
Max. Flag Channels | 64 (Basic), 256 (HD) |
# of Pages | 24 |
---|---|
Custom Page Design | yes |
Custom Themes | yes |
Pre-loaded Templates/Pages | yes |
Knock Metrics |
|
---|---|
Knock Frequency Analysis | Real-time/cylinder (HD version only) |
Math Channels | 4 (Basic) , 8 (HD) |
DEVICE COMPATIBILITY
Adaptronic | |
---|---|
AEM |
|
Bosch Motorsport |
|
Carrot | |
DTA |
|
ECUMASTER |
|
EFI |
|
Electromotive TEC | |
Emerald |
|
Emtron | |
E-Race Black | |
GEMS | |
Haltech | |
Hondata |
|
KMS |
|
Life Racing | |
LINK |
|
MAXX | |
MARELLI | |
Mectronic |
|
Megasquirt | |
Microtech |
|
MMe |
|
MOTEC |
|
Pectel |
|
Specialist Components |
|
SYVECS |
|
Triject |
BMW M2/M4 |
MItsubishi Evo X |
Toyot GT86 |
OBD – CAN ISO15765 |
OBD – MODE 22 MANUFACTURER SPECIFIC PIDS |
OBD – UDS |
J1939 |
NMEA2000 |
PDU Ecumaster |
PDU HP Elektronic |
PDU Life Racing |
PDU Motec |
PDU Syvecs |
PDU Tremondi |
PDU MSEL Master Relay |
ABS Bosch Motorsport M4/M5 |
DCU Motec MDC/MDC2 |
KEYPAD Blink Marine |
KEYPAD Tremondi |
LAMBDA AEM |
LAMBDA Ecumaster |
LAMDA Haltech |
LAMBDA Link |
LAMBDA Motec |
SENSOR AEM Thermocouple Amplifier |
SENSOR KMS Thermocouple Amplifier |
SENSOR KMS Flex Fuel |
SENSOR KMS Speed Sensor |
SENSOR Motec E888 |
SENSOR Syvecs Thermocouple Amplifier |
SENSOR TEXENSE IRN4C/IRN8C/THN4X |
SENSOR AIM TPMS |
SENSOR IZZE TPMS |
TCU XAP ESHIFT2 |
QUESTIONS? ANSWERS.
PLEX Device Manager 2.0 | download |
---|---|
PLEX Data Analysis 2.0 (PDA-WIN) | download |
1. Device | ![]() |
---|---|
2. USB-C to USB Cable | ![]() |
3. 4m dual Knock Cable | ![]() |
4. 2m Trigger/IOs Cable | ![]() |
5. 2m Power/CAN Cable | ![]() |
6. Bosch Knock Sensors & Sensor Connectors |
![]() |
7. Connectors & Pins | ![]() |
8. USB Stick Kit | ![]() |