AEWA1025

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Flow sensors find a wide variety of applications in systems where the monitoring of flow of fluid or gas is critical. For example these sensors are used to measure air flow from fans, regulate the flow of coolants in cars, measure blood flow and so on. The AEWA1025 is one such flow sensor which finds itself as a popular pick for industrial applications.

The AEWA1025 is a hot-wire differential air flow sensor with a linear output. It features an in-built amplifier circuit for high sensitivity. This hot-wire type temperature independent sensor works on the principle of measuring the resistance of a wire when current passes through it. The resistance of the wire changes as the flow changes, thereby indicating the flow.

Let us delve more into the working of this sensor. Inside the AEWA1025 is a pair of micro-heater and hot-wire, which form a Wheatstone bridge. A current of 220uA is passed through the two. Due to this current, unnecessary heat is absorbed by the micro-heater, while the hot-wire faces a decrease in temperature. As a result, the resistance of the hot-wire drops by roughly 32%. The hot-wire is housed within a cavity of 1 inch by 1 inch and is open to the atmosphere. In the presence of any gas flow, the thermal energy does not dissipate away, and hence the thermal energy in the hot-wire accumulates resulting in a rise in its resistance.

The sum of the resistances in the Wheatstone bridge form the total resistance RN. A differential amplifier measures the voltage between two resistance subtotals and produces an output voltage signal proportional to the differential pressure created by the flow of the gas. This output signal can be directly linked to a microprocessor or A/D converter for further digital processing. The output voltage is tailored to a certain range by changing the current within the Wheatstone bridge.

The AEWA1025 series is one of the most reliable and efficient pneumatics used in industrial applications. With the ability to work best in wet conditions with no additional maintenance or calibration, it is preferred for many applications such as detecting gas flow in HVAC systems, controlling fan speeds in exhaust systems, creating differential pressure for flow and velocity measurements, and aiding with quality control processes within industrial facilities.

Further, the AEWA1025 comes with added technical benefits such as an ultra-low profile design with a built-in dispersion ventlet, and a highly efficient filtering system. This cutting-edge air flow sensor has over-temperature protection for safety and comes with a wide range of customization options, such as differing mounting options, custom designed circuits and many more. This makes it an invaluable tool for users across industries.

The AEWA1025 is a versatile piece of equipment that simplifies complex measurements. With its lightweight construction and accurate readings, this flow sensor is a dependable and efficient solution for industrial applications.

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