
iMFD Stands for intelligent multi-functional display. It is the PLX standard for connecting everything in a daisy-chain.
Any product labeled with
are fully compatible with each other.
Sensor Modules (SM)
Up to 32 sensor modules can be connected in any combination

To Display Modules or Data Logger
Display Modules (DM)
Up to 32 display modules can be connected in any combination

Simple Setup
The simple setup connects to just one SM module. This is great for stand alone gauges.Looking at the above diagram.

PLX Display Modules are also compatible with the PLX iMFD serial stream.
Data Logging
Two Options for datalogging are available. iMFD Data Logger and the iMFD Serial USB Adapter.
| iMFD Data Logger | iMFD Serial to USB Adapter | |||||
| From Sensor Modules | ![]() | To Display Module | From Sensor Modules | ![]() | To Display Modules | |
| USB to PC High Speed download from flash Real-time | ![]() | USB to PC Real-time only | ||||

Air Fuel Ratio Sensor Module The PLX Air Fuel Ratio Sensor Module accurately measures the precise air fuel ratio (AFR) of any internal combustion engine. Up to 32 Sensor Modules can be daisy chained together from the PLX iMFD line for modular tuning. This Sensor Module can also be used as a stand alone unit capable of interfacing with third party hardware through the analog outputs. The SM-AFR works with gasoline, biodiesel, ethanol, methanol, E85, LPG, and CNG. Advanced soft start technology prolongs the O2 sensor life.
Tech Specs
| Physical Dimensions: | 2 x 2.875 x 1.125" (52 x 75 x 28mm) L x W x H |
| Technology: | PLX Critical Response Technology, Fast Response PID |
| Accuracy: | < 0.1AFR (Gasoline) Wideband, < 0.2AFR (Gasoline) Narrowband |
| Measurement Range: | 10-20AFR, 0.68 lambda - 1.36 lambda (Gasoline) |
| Analog Outputs: | Wideband Linear 0-5V, Narrowband 0-1V (Driving Current 20mA) |
| Operating Voltage: | 9V-20V |
| Power Consumption: | 20 Watts (Max), 13 Watts (Typical) |
| Power Supply Technology: | High Efficiency Switching with Soft Start Technology |
| Operating Temperature: | 0 - 85 Deg C |
| Sensor: | One Bosch LSU 4.2 |
| Enclosure: | Extruded Plastic |
Included Items
> SM-AFR main unit
> Bosch LSU 4.2 wideband sensor
> O2 sensor harness 3m (10ft)
> 4ft Analog wires and connector with 4 terminals
> 4ft Analog wires
> 30cm (1ft) Serial Cable
> Termination jumper






