This differential pressure gauge is designed to measure low air or non-corrosive gas pressures with high precision. Ideal for applications such as HVAC systems, fan and blower pressure monitoring, filter resistance analysis, air velocity measurement, furnace draft evaluation, and pressure drop across orifice plates. It can also measure fluid levels in bubbler systems and pressures in fluid amplifiers. The 0-2 inches of water range ensures reliable measurements for low-pressure environments, providing accurate readings for various industrial, commercial, and residential applications. Constructed from durable aluminum, this gauge offers a robust design with 1/8" female NPT high and low pressure taps for easy installation. Its accuracy of ±2% at 70°F ensures dependable performance, while the ambient temperature range of 20°-140° F makes it versatile across a wide range of environments. This gauge is specifically designed for use with air or compatible gases (not for use with hydrogen gas) and is perfect for precise pressure measurements in low-pressure systems.