X-Series Ultra-Fast Electronics

AEM’s latest controller tech means:

• Faster refresh rate

• Improved accuracy

• Better stability in heat

• Cleaner data for ECUs & dataloggers

• Cleaner data for ECUs & dataloggers

High-Visibility Digital Display

• Crisp central LED pressure readout

• Sweeping bar-graph outer ring

• Black gauge face with interchangeable bezels

• 52mm (2-1/16”) standard size

Analog + Serial Outputs

Perfect for:

• Standalone ECUs

• AEMNet/CD-Series digital dashboards

• Data loggers

• Safety systems (fuel pressure fail-safe, oil pressure cut, etc.)

Universal Application

Works with carbureted, EFI, turbocharged, supercharged, and naturally aspirated engines.

Why Builders Choose the 30-0309

• Ideal for boost pressure, up to 150 PSI

• Excellent for fuel pressure monitoring on boosted or E85 vehicles

• Perfect for oil pressure protection on high-RPM builds

• Integrates easily into modern tuning systems

• Provides fast and accurate data needed for serious performance tuning

This gauge gives you the real numbers—not delayed, bouncing, or inaccurate readings from outdated analog gauges.

Installation Notes

• Requires a compatible AEM pressure sensor (0–150 PSI)

• For oil pressure, use a remote hose to reduce vibration damage

• For fuel pressure, ensure proper threaded fitting on rail/regulator

• Avoid routing wiring near exhaust heat

• Analog output can be used for ECU pressure-based safeties or logging

Typical install time: 30–60 minutes, depending on sensor location.

Final Verdict

The AEM 30-0309 X-Series Pressure Gauge is one of the best digital pressure monitoring tools available for street or motorsport builds.
With ultra-fast response, high accuracy, 0–150 PSI range, and seamless ECU/datalogger integration, it’s a must-have for any performance vehicle that depends on stable fluid or boost pressure.

If you want clean, reliable, real-time pressure data—this is the gauge to run.