JEGS 555-41513 Fuel Pressure Gauge Features:

• 0-100 psi reading for most fuel injected applications
• 1/8 in. NPT male threaded fitting to screw into your existing fuel system
• Liquid-filled to slow down engine vibration of the needle
• Black case and bezel for long life and great looks
• 1 1/2 in. diameter black face for compact viewing such as under the hood

FAQ

Should fuel pressure gauges be liquid filled?

• Yes, using a liquid-filled fuel pressure gauge is recommended. The liquid filling helps dampen vibrations and pulsations, providing more accurate and stable readings, especially in high-vibration environments.

Why are some pressure gauges filled with fluid?

• Pressure gauges are filled with fluid (usually glycerin or silicone oil) to reduce needle vibration, enhance shock resistance, and improve overall accuracy. This is particularly beneficial in applications where vibrations or pulsations are common.

What is the filling liquid for a pressure gauge?

• The filling liquid for pressure gauges is typically glycerin or silicone oil. These liquids help stabilize the gauge's needle movement, ensuring more precise and reliable pressure readings.

What is the difference between liquid filled and non-liquid filled pressure gauges?

• Liquid-filled pressure gauges have a damping liquid inside that minimizes needle oscillations for improved accuracy and durability, especially in high-vibration environments. Non-liquid-filled gauges lack this fluid, making them more susceptible to vibrations and providing less stability in readings.