A GVI flow meter is a fire pump test meter manufactured by Global Vision Inc. (GVI), known for its patented venturi design, accuracy, and the option of glycerin-filled gauges for consistent readings. These meters are often FM Approved, made in the USA, and come with a 0 to 5-year warranty, though other suppliers may also offer GVI-branded meters. Key Characteristics Patented Venturi:GVI is the only fire pump test meter supplier with a patented venturi design, which contributes to the meter's accuracy and consistency. High Accuracy:The design and manufacturing process are focused on providing superior accuracy, with claims of being closer to 0.5% in 3rd party testing. Made in the USA:GVI proudly machines its venturis in-house from domestic US steel, ensuring quality and freedom from imperfections. Glycerin-Filled Gauges:These gauges reduce vibrations, providing more consistent and reliable readings during flow tests, and have a longer lifespan than non-filled gauges. FM Approved:GVI's meters are FM approved, a critical certification for fire protection equipment. Long Warranty:GVI offers a long 5-year warranty on its flow meters. Applications Fire Pump Testing:The primary application for GVI flow meters is in testing fire pumps to ensure their correct and consistent performance. Automotive Applications:Some GVI flow meters are used in automotive contexts. Advanced Applications:Options like digital 4-20 mA transmitter gauges are available to meet more diverse and advanced customer needs.