AZUNO Digital Compression Gauge for Petrol Engines — 200 PSI Kit with 4 Adapters & Backlit Display

This compact kit is designed for home mechanics and professional technicians who need reliable cylinder compression data fast. The kit includes a digital gauge, a 16-inch flexible hose with quick coupler, four adapters for common spark plug hole sizes, and a rugged storage case. Built with steel and brass components, it aims to bring shop-quality durability into any garage while preserving battery life with an auto-off function.

How accurate and repeatable are the pressure readings?

The AZUNO digital gauge offers high-resolution readings with a 0.1 PSI display and claims accuracy within 1% across the 10–200 PSI range. That level of precision helps you compare cylinders and detect leaks or worn components consistently between tests.

• Display resolution: 0.1 PSI for fine measurement detail
• Operating range: 10–200 PSI suitable for most petrol engines
• Stated accuracy: within 1% for dependable comparisons
• Auto-off feature preserves battery between sessions

What components come in the kit and how do they connect?

The kit arrives as a ready-to-use package with adapters and a flexible hose that attaches to the digital gauge via a quick coupler. Four adapters cover standard and specialty spark plug thread sizes so you can test a wide variety of petrol engines without improvisation.

• Four adapters for common spark plug ports and specialty threads
• 16-inch flex hose with quick coupler for easy connection and reach
• Compact deluxe case keeps components organized and protected
• Brass and steel fittings ensure a reliable, leak-resistant seal

How does the display and bleed function simplify testing?

The wide backlit LCD shows large numbers in four selectable units so you can read results at a glance in any light. A side-mounted bleeder valve lets you release pressure to repeat tests without detaching the hose, saving time during comparative checks.

• Backlit LCD supports visibility in dim workshop lighting
• Four unit options for PSI, kPa, BAR, and kg/cm² (selectable)
• Side bleeder valve for controlled pressure release between tests
• Automatic shutoff after 2.5 minutes to extend battery life

What durability and support can I expect from this tool?

AZUNO built the gauge assembly from durable metals intended for repeated use in shop environments. The sturdy case and quality hose help the kit resist wear, while AZUNO’s one-year warranty and online technical support give added peace of mind.

• Steel and brass construction for long service life
• Deluxe molded case for transportation and storage protection
• Designed for frequent use in garage or professional shop settings
• One-year warranty plus online customer support from AZUNO

Who is this for: The AZUNO Compression Tester Automotive is intended for DIY enthusiasts, fleet technicians, and professional mechanics who need accurate, repeatable compression readings from petrol engines. If you troubleshoot misfires, assess engine wear, or perform routine diagnostics, this kit provides the accessories and measurement fidelity to make informed decisions quickly.