Vacuum 30 IN.Hg.

The AutoMeter Vacuum 30 IN.Hg gauge is a precision mechanical instrument designed for engine diagnostics, fuel system monitoring, and brake system evaluation on automotive and small engine applications. This analog vacuum gauge measures negative pressure from 0 to 30 inches of mercury (in.Hg), making it essential for technicians, mechanics, and serious enthusiasts who need reliable real-time vacuum readings to diagnose engine performance issues, carburetor function, and emission control system health.

Built with AutoMeter's Sport-Comp series construction, this vacuum gauge features a 2-5/8 inch diameter face with a black background dial that delivers excellent readability in all lighting conditions. The mechanical design operates without electronic components, eliminating battery dependency and ensuring long-term durability in harsh shop environments. A full-sweep analog needle provides instant, glitch-free pressure readings across the entire 0–30 in.Hg range, allowing users to identify manifold vacuum anomalies that indicate worn rings, valve leakage, intake gasket failures, or vacuum brake booster issues with immediate visual feedback.

Professionals and DIY mechanics rely on the Vacuum 30 IN.Hg gauge for carburetor tuning, idle quality assessment, and pre-purchase vehicle inspections where vacuum stability directly correlates to engine condition and fuel efficiency. The compact 5.7 x 5.35 x 5.8 inch footprint and lightweight 0.72 lb design allow for portable bench mounting or temporary engine bay installation during diagnostic sessions. Installation requires only a simple vacuum line connection to the intake manifold or other vacuum source, making this AutoMeter gauge an indispensable tool for any serious garage, shop, or restoration project.