KOSO DL-03A Gauge (BB642W32) — Air/fuel ratio indicator and RPM data logger equipped with BOSCH® LSU 4.9 sensor. This compact gauge is designed for riders and tuners who want to monitor the mixture and engine speed from a readable display, even in cold weather thanks to its heated screen.

• Sensor: BOSCH® LSU 4.9 for air/fuel ratio (AFR) reading
• Ranges: AFR 9.0 – 24.0; λ 0.61 – 1.63; RPM 0 – 14,000
• Functions: digital tachometer in numbers and segments, digital voltmeter, 5 warning lights
• Recording: up to 50 passes, 99min59s90 max per recording, total duration ≈ 3.15 hours
• Alert settings: rich/lean AFR thresholds, RPM alarm, low voltage alert
• Screen: adjustable backlight (1–5) and heating function for optimal reading
• Power / Dimensions: 12 V DC, 72 x 32.3 mm, ~100 g

Easy to install on a wide range of vehicles (motorcycles, snowmobiles, UTVs…), the DL-03A offers quick readings of RPM and air/fuel mixture for track monitoring or road use. Delivered in black finish, it blends into a dashboard without cluttering the space.

Manufacturer reference: BB642W32