Glass rotor flowmeterClassification:
According to its purpose and applicability, it can be divided into eight series: ordinary type, reinforced pipe type, small flow and small shape type, corrosion-resistant type, laboratory type, insulation type, alarm type, and high-pressure resistant type. According to the national instrument series spectrum, regardless of which series, it mostly includes a total of 12 calibers from 1 millimeter to 100 millimeters, and the measurable flow range is: liquid (water) 0.1 milliliter/minute to 40 cubic meters/hour, gas (air) 1 milliliter/minute to 1000 cubic meters/hour. The glass rotor flowmeter used for environmental protection instruments generally has a diameter of no more than 10 millimeters, and the measured flow rate belongs to the small flow range.

Glass rotor flowmeterThe selection can be considered from the following aspects.
1. Object of measurement. Measure the type of medium, pressure level, and chemical properties. For corrosive media such as liquid and gas media, corrosion-resistant flow meters should be selected.
2. The performance of the flowmeter itself. After the above conditions are determined, generally speaking, if there is no significant change in price, priority can be given to using a needle valve placed on the upper part of the flowmeter; For those with larger flow holes, it is a direct flow scale; Simple in structure; Smaller external dimensions, etc. If it is in a small flow range, the ball float type can be used because it is stable, less prone to dust accumulation, has high accuracy, and has good interchangeability during measurement.
3. Choose according to the price. Generally speaking, high precision comes at a higher price. The accuracy level of the instrument should be selected according to the measurement purpose. If only the measurement medium throughput needs to be controlled, adjusted through trial operation, and the throughput needs to be consistently stable in the future, then accuracy is secondary.