The water flow indicator, also k☆♦nown as the impeller mirror, i∑‍s a straight-through mirror, which≈≤ is an essential accessory for observing the f♥ low of media in the pipe. The sight glass is ↑ε≠used in industrial production equipme•✘nts such as petroleum, chemical, ch↕♠≥emical fiber, medicine, food, et‌£Ωc. It can observe the flow reaction of liqui↓β∑±d, gas, steam and other media at any time, ↕≤and is an indispensableα♠¶ accessory to ensure no♦★λσrmal production. The flow indicator includes®φσ✘ a threaded water flow indicatδ& ≤or, a welded water flow ₽•indicator, a flanged water flow indicator, a sad¥↕dle water flow indicator, an↓λ&d a saddle water flow indicator. The waε±≈≈ter flow indicator can also be >&'used in an automatic sprinkler systeγ≥×¥m, which can be installed on the main water supp✔♦∞ly pipe or the cross-bar water pipe to give☆♥★∞ an electric signal of$®$ the water flow in the community in a certai§∏n area, and the electric signal can≈φ be sent to the electric control box, but It is §€usually not used as a control switch t€σo start a fire pump.