Flow indicator 
 Flow indicator, also known as the impeller, as the mirror is a direct endoscopy is necessary attachments observe the pipeline medium flow. The endoscope is used in the petroleum, chemical, chemical fiber, medicine, food and industrial production equipment, ready to observe the flow of liquid, gas, steam and other media reaction is to protect the normal production indispensable attachment. The flow indicator, including the thread flow indicator, welding flow indicator, flange type flow indicator, saddle-type flow indicator, saddle-type flow indicator. 
 Water flow indicator can also be used for the automatic sprinkler system, it can be installed on the main supply pipe or bar pipes, given the small region of a particular sub-regional water flow signal, this signal can be sent to the electronic control box, also be used to start the fire pump control switch. 

 A flow indicator Overview: Suitable for automatic sprinkler system 
 2, the definition of flow indicator: for automatic sprinkler system will flow signals into electrical signals an alarm device. 
 3, the basic parameters of the flow indicator 
 1) the maximum working pressure of the flow indicator is 1.2MPa.