Air/Fuel Meter - Dual Sensor

The FAST Electronics Air/Fuel Meter with Dual Sensor (model 170402) is a wideband air-fuel ratio gauge designed for engine tuning and performance diagnostics. This digital gauge delivers real-time air-fuel ratio monitoring with dual O2 sensors, enabling precise fuel mixture control across the full operating range of gasoline engines. The rectangular black and red face display integrates seamlessly into custom gauge clusters and dash installations, providing the visual feedback tuners and performance builders require during dyno testing, street tuning, and engine development.

The dual-sensor wideband configuration captures air-fuel ratio across a broader spectrum than narrow-band sensors, allowing technicians to identify rich and lean conditions with accuracy. Data logging capability records air-fuel ratios during test runs, creating a usable dataset for tuning adjustments and performance optimization. The included O2 sensor cables are engineered for reliable signal transmission from the exhaust system to the gauge head, minimizing noise and ensuring accurate readings during high-RPM operation. The electric gauge responds quickly to mixture changes, critical for identifying transient conditions during acceleration and load transitions.

This gauge serves engine builders, performance shops, tuning technicians, and enthusiasts performing carburetor or fuel injection tuning on gasoline engines. It is equally valuable for monitoring fuel mixture stability on street-driven vehicles, race applications, and forced-induction platforms where mixture control directly impacts power and reliability. The data logging function supports a methodical approach to tuning, eliminating guesswork and enabling repeatable, documented adjustments.

Air-fuel ratio gauges have become standard equipment in modern engine development and performance tuning. The wideband technology and dual-sensor design position this meter as a serious tool for anyone serious about engine calibration and performance verification on gasoline engines.