Thermal Probe for Anemometers/Wind Speed Meters
The working principle of the thermal sensitive probe of an anemometer is based on the cold shock airflow carrying away the heat from the heating element. With the help of an adjustment switch, the temperature is kept constant, and the current and flow rate are proportional to each other. When using a thermal sensitive probe in turbulence, airflow from all directions simultaneously impacts the thermal element, which can affect the accuracy of the measurement results. When measuring in turbulence, the readings of thermal anemometers/anemometer flow sensors are often higher than those of rotary probes. The above phenomenon can be observed during pipeline measurement. According to different designs for managing turbulent flow in pipelines, it may even occur at low speeds. Therefore, the measurement process of anemometer/anemometer should be carried out in the straight section of the pipeline. The starting point of the straight section should be at least 10 × D (D=pipe diameter, in CM) outside the measurement point; The endpoint should be at least 4 × D behind the measurement point. The fluid cross-section must not have any obstruction. (Sharp edges, heavy suspension, objects, etc.)
Wheel type probe for anemometer/anemometer
The working principle of the anemometer/anemometer's rotary probe is based on converting rotation into electrical signals. First, it passes through a proximity sensing head to "count" the rotation of the rotor and generate a pulse series. Then, it is converted and processed by the detector to obtain the speed value. The large-diameter probe (60mm, 100mm) of an anemometer is suitable for measuring turbulent flow with medium to low velocities (such as at pipeline outlets). The small aperture probe of an anemometer is more suitable for measuring airflow in pipelines with a cross-section greater than 100 times that of the exploration head.
