Flow transmitter

Verification regulation and flow meter standard are the guarantee that flow sensor can measure accurately. Accurate measurement of flow is very important in many fields and is widely used in economic fields, such as environmental monitoring, medical and health care, safety protection and trade settlement.
According to the structure of the flow transmitter can be divided into blade (wing) type, quantity core type, hot wire type, hot film type, Carmen vortex type and so on.
According to its standard properties to classify, can be divided into the following categories. Method standard: some sensor calculation method, detection method, test method and performance evaluation method and so on; Basic standards: basic parameters, models, nomenclature and terminology of some sensor specifications; Product standard: This type of sensor has been included in kuaiyi, which specifies the technical requirements of the sensor, acceptance rules, test methods and product classification, in addition to the requirements for correct installation and use, etc. Some standards only have proper installation and use techniques, and these are the product application properties of product standards.
If according to the Chinese standard level, it can be divided into four categories: enterprise standard, local standard, industry standard and national standard.
1) According to the input, classification: displacement sensor, speed sensor, temperature sensor, pressure sensor, etc
2) Classification by working principle: strain type, capacitance type, inductance type, piezoelectric type, thermoelectric type, etc
3) According to the physical phenomenon classification: structural sensor, characteristic sensor
4) According to the energy relationship classification: energy conversion sensor, energy control sensor
5) According to the output signal classification: analog sensor, digital sensor
features
At present, baffle can be designed according to the size of water flow to reduce the water resistance generated by water flow through the flow sensor and reduce the pressure head loss of the water system. However, due to the fatigue problem of baffle type under the impact of water flow for a long time, even if the flow value is calibrated in the factory, the set point drift will occur.
It is usually used where the protection flow value does not require precision, i.e. for the interruption of water flow in the pipe. There are very few water source heat pump units designed in China.
Baffle type is specially for the water ring/ground source heat pump air conditioning unit water flow monitoring and development, it is for different pipe diameter with different block, each block of water resistance is not more than 0.5 meters of water column, compared with the target type water resistance has been greatly reduced.
Each baffle flow sensor is equipped with the same pipe fittings as the water ring heat pump unit. The site only needs to connect the upper pipe, without any change to the baffle plate. In addition, the pressure of the baffle flow switch is greater than 25bar, which is a low-cost water flow switch in the water ring heat pump unit with low water flow requirements.
After on water ring/ground source heat pump units using feedback, differential pressure switch can effectively judge the water loop heat pump units installation of conduit road problem, can completely avoid freezing water flow due to less heat exchanger, flow sensor can protect water flow caused by water filter clogging is reduced the condition of the heat exchanger freezing, In addition, the water pipe differential pressure switch has no risk of fatigue failure of target flow switch.
Especially when there is a small amount of air in the water pipe, the flow sensor works very stably and will not appear similar to the floating situation of the target flow switch. After years of use, the feedback has not found the fault of the differential pressure switch itself.

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