AZUNO Digital Compression Tester for Petrol Engines, 200 PSI Kit with 16" Hose & 4 Adapters, Backlit Gauge

This compact kit combines a high-resolution digital gauge, a flexible 16-inch hose with quick coupler, and four adapters to inspect gasoline engine cylinder compression reliably in the garage or workshop. The gauge displays readings to 0.1 increments, offers multiple units, and includes a side bleeder valve so you can bleed pressure without disconnecting the hose. All components pack into a hard deluxe case for organized storage and transport.

How accurate and repeatable are the pressure readings?

The digital meter provides a high-resolution display and tight tolerance suitable for diagnostic comparison across cylinders. It reports changes clearly so you can spot weak or leaking cylinders during a compression test sequence.

• Resolution: 0.1 PSI increments for precise readouts.
• Range: 10–200 PSI covers most petrol engine needs.
• Tolerance: designed to stay within about 1% of true pressure for consistent comparisons.

What accessories come with the kit and how are they used?

The set includes multiple threaded adapters to fit standard spark plug ports and a flexible hose with a quick coupler to swap testers without losing pressure. A side-mounted bleeder valve lets you release pressure between attempts while keeping the hose connected.

• Four adapters: standard and specialty sizes to match common petrol engines.
• 16-inch flex hose: long enough to reach awkward spark plug wells.
• Quick coupler: speeds up switching between cylinders during multi-cylinder testing.
• Bleeder valve: permits repeated measurements without hose disconnection.

Is the gauge built to withstand garage use?

The tester uses robust steel and brass fittings designed for frequent shop handling. The gauge housing and hose assembly are made to resist the knocks and temperatures typical in automotive service environments.

• Metal fittings: durable steel and brass construction for longevity.
• Protective case: locks components in place for transport and storage.
• Auto-off function: preserves battery life during intermittent use.

How does the display and battery behavior support practical testing?

The wide backlit LCD shows large numerals in four unit choices, making readings quick to scan even in dim light. The unit conserves power by shutting off after a short idle period, leaving you free to focus on the mechanical procedure instead of battery management.

• Backlit LCD: clear visibility in low-light workspaces.
• Four measurement units: select the scale you prefer.
• Auto power-off: reduces unnecessary battery drain between tests.

Who is this for? Mechanics, DIY enthusiasts, and inspection technicians who need a portable, accurate compression testing solution for petrol engines. If you perform engine diagnostics, compare cylinder health, or prepare vehicles for sale or repair, this AZUNO kit provides the adapters, hose, readable digital display, and rugged hardware to perform fast, repeatable compression checks in a professional or home garage setting.