Classic Instruments HR194SLF Hot Rod 2 1/8" Air Fuel Ratio Gauge

The Classic Instruments HR194SLF Hot Rod Air Fuel Ratio Gauge delivers precision engine monitoring in a compact 2 1/8" diameter package. This complete wideband AFR system combines a premium oxygen sensor, controller, and gauge with full sweep movement for enhanced accuracy in tuning and diagnostics.

Key Features:

• Complete wideband system with premium air/fuel sensor and controller included
• Full sweep gauge movement provides superior reading accuracy
• Push-button calibration for easy setup and adjustment
• Integrated red warning light illuminates entire gauge face when triggered
• Selectable LED backlighting in Warm White or Cool White
• Analog 0.5 - 4.5VDC output compatible with data logging systems
• Warning light output terminal for external indicator lights
• Standard 2 1/8" mounting hole fits most gauge panels
• Calibrated specifically for gasoline fuel applications

What's Included:

• 2 1/8" air/fuel ratio gauge
• Wideband oxygen sensor and controller
• Complete wiring harness
• Weld-in bung with plug
• All necessary installation hardware

This Hot Rod series gauge combines classic styling with modern digital sensor technology, providing accurate air/fuel mixture monitoring essential for performance tuning and engine protection. The full sweep design offers better resolution than traditional limited-range gauges, while the integrated warning system alerts you to potentially dangerous lean or rich conditions.