Precise Monitoring, Safe and Worry-free: high-precision pressure gauge, 1-100 PSI clear scale, real-time display of fire extinguisher pressure status, ensure that the equipment is always in the effective working range Durable and Reliable, Pressure-resistant and Leak-proof: stainless steel material, corrosion-resistant and vibration-resistant, sealed structure design, long-term use without leakage, adaptable to various environments Water-based, Strong Compatibility: specially optimized for water-based fire extinguishers, suitable for a variety of water-based fire extinguishing systems, ensuring that pressure data accurately reflects the status of the fire extinguishing agent Clear and Easy to Read, Intuitive Operation: large dial + high-contrast scale, with eye-catching safety zone (green) and warning zone (red), clear at a glance, convenient and quick to check