Brooks Instruments 3810 Series Metal Tube Variable Area Flowmeter, Model 3810GAA12BFAA1A0000

The Brooks Instruments 3810 Series is a rugged, all-metal variable area flowmeter designed for precise measurement of liquid and gas flow rates in industrial applications. This model, 3810GAA12BFAA1A0000, features a 1.5-inch flanged connection and is suitable for high-pressure and high-temperature environments, making it ideal for chemical processing, oil and gas, pharmaceuticals, and water treatment industries. It operates on the variable area principle, where a float rises in a tapered tube to indicate flow rate on a direct-reading scale, offering accuracy up to ±2% full scale. Key benefits include corrosion-resistant stainless steel construction, low pressure drop, and easy installation without straight run requirements. Compared to similar rotameters like those from Krohne or Yokogawa, the 3810 provides superior durability in harsh conditions and optional alarm switches for process control. Drawbacks may include limited suitability for very low flow rates or slurries, and it requires vertical installation. This unit appears in good used condition, manufactured in 2018, with no visible damage, and includes a mechanical indicator for reliable, non-electronic operation. It supports flow ranges up to 12.15 lbs/hr for certain fluids, enhancing process efficiency and safety.