Dwyer DTFW-1B-4W Variable-Area Flowmeter is designed for liquids and oil, with a temperature range of -40 to 200°F (-40 to 93°C). It offers reliable accuracy, with ±2% FS for liquid/oil calibration and ±5% FS for air calibration. The meter is compatible with a wide range of liquids and gases and features a durable construction with wetted materials including 316 SS, brass or aluminum. With a pressure limit of up to 3000 psig (200 bar) and a diameter dial face of 2.5" (63.5 mm), this flowmeter provides accurate and reliable flow measurement.