LM-1: Digital Air/Fuel Ratio Meter
The LM-1 is the industry's first and best complete wideband tuning system.
A single self-contained unit combines a wideband air/fuel ratio sensor controller,
a 6-channel data logger, and an easy-to-read backlit LCD display. This is the
unit used by tuners, racers, and engine builders the world over.
Tuning an engine for maximum power previously required long trial-and-error
sessions on a dynamometer. With the LM-1, precise AFR measurement allows the
user to correctly adjust many variables- including carburetor jetting, fuel
injection, turbo fuel curves, etc.- without long and expensive dyno sessions.
The meter's digital signal processing technology provides data on exactly how
rich or lean an engine is running at any load. The LM-1's self-calibrating
circuitry also compensates for changes in temperature, altitude, and sensor
World's only fully-digital
Up to 6 Channels of data logging.
Display both A/F and Lambda readings in real-time.
Auto calibration to compensate for changes in
temperature, altitude, and sensor condition.
Two user configurable analog outputs.
LogWorks - award winning tuning software.
The instrument can sample and store 6 channels of data- air-fuel-ratio
and up to 5 other sensor data channels- internally in operation for later
analysis on a personal computer. At a sampling rate of 12 samples/second the
instrument can store up to 44 minutes worth of data in non-volatile memory.
The data can be downloaded to a personal computer using a standard serial port
and viewed/analyzed by the included LogWorks software or any standard spreadsheet
The LM-1 also features two analog outputs to connect to analog gauges, dyno computers,
ECUs, piggyback controllers, and other devices with analog inputs. Analog output 1 comes
setup from the factory ready for narrowband simulation; analog output 2 is configured as
1 volt = 10 AFR (.6 lambda) and 2 volts = 20 AFR (1.3 lambda). With the provided LM
Programmer software these analog outputs may also be configured by the user.
The Basic LM-1 Kit includes:
- the LM-1 meter,
- a Bosch wide-band oxygen sensor,
- 10 ft sensor cable,
- cigarette-lighter power adapter,
- serial cable for PC connection,
- 9V battery,
- exhaust bung and plug,
CD and quick-start guide