Why does the transmitter use 4-20mA? Why choose 4-20mA instead of 0-20mA?
It is common in industry to measure various non-electrical physical quantities, such as temperature, pressure, speed, angle, etc., which need to be converted into analog electrical signals before they can be transmitted to a control room or display device hundreds of meters away. This device that converts physical quantities into electrical signals is called a […]
Why does the transmitter use 4-20mA? Why choose 4-20mA instead of 0-20mA? Read More »
