Air is compressible. Air that has been compressed by an air compressor to reduce its volume and increase its pressure is called compressed air. Compressed air is an important source of power. It is different from other compressed air, that is, air compressed by external force. With the widespread application of compressed air, different industries have different requirements for compressed air quality. Compressed air is taken from the atmosphere, and the atmosphere always contains a certain amount of water vapor. The main factors affecting the quality of compressed air are oil, water, and solid particles. The larger-diameter orifice flowmeter used to measure the flow of compressed air often has water accumulated in front of the orifice, which will affect the measurement accuracy. There is often a section of water in the pressure pipe, which causes the differential pressure measured by the differential pressure transmitter to be inconsistent with the differential pressure generated by the throttling device. These are common reasons for errors caused by water in the air.
However, oil content is the most difficult to detect, and because of this, different detection methods and means have emerged in the industry. Reasonable use of air compressors can bring great energy saving effects to users. By measuring the gas flow of air compressors, reasonably monitoring the use of air compressors in various periods of time, and according to the changes in the gas flow of the compressor, the contract sets the start and stop mode of the air compressor and the pipeline wiring plan, a lot of energy consumption can be effectively saved. An ISweek gas flow sensor from Gongcai.com - AFE-01 is suitable for monitoring changes in air compression flow.
The gas flow sensor – AFE-01 consists of four platinum thin film resistors with low impedance and a small heating area. There is a high impedance resistor on each side of the heater to detect the flow rate and direction, and a resistor to detect the temperature of the gas . The two resistors close to the heating element are connected to form a bridge, which produces an output signal for the detection of flow rate and flow direction. In the absence of flow, the two resistors reach the same heating state. When there is flow, the temperature of one resistor is much lower than the other. Which resistor is lower in temperature depends on the flow direction. The temperature difference can be measured and is determined by the flow rate and flow direction. The heating time and response time of the flow sensor are very short because of its small thermal mass. This method can detect very small changes in flow rate. In order to obtain higher flow rates, the temperature sensor can be connected to a constant temperature anemometer.
Because the gas flow sensor AFE-01 is produced by a European professional flow manufacturer, it has the characteristics of very small size, dual flow direction detection, detection of the flow of small mass objects, simple signal processing circuit and calibration, completely fixed mechanical components, excellent repeatability and long-term stability, etc., it is suitable for use in the medical and instrumentation industries, and OEM customers.