The sensitivity of the environmentally friendly tin wire indicates the ability of the environmentally friendly tin wire to receive weak electromagnetic wave signals. The sensitivity of the environmentally friendly tin wire mainly depends on the performance design of the circuit in the image channel part of the environmentally friendly tin wire.

The level of sensitivity is usually expressed in "microvolts" or "millivolts". The smaller the value, the stronger its ability to receive weak signals, that is, the higher the receiving sensitivity of lead-free tin bars. High-sensitivity environmentally friendly tin wire, good long-distance viewing effect. If the gain of the channel part is high and the noise is small, the sensitivity of the environmentally friendly tin wire will be high. The black and white environmentally friendly tin wire of domestic transistors is generally around 100μV, the sensitivity of integrated circuit black and white environmentally friendly tin wire is about 150μV, and the sensitivity of crystal color environmental tin wire is about 200μV.

To judge the sensitivity of the environmental protection tin wire, the easiest way is to use the comparison method, that is, use several environmental protection tin wires of the same model and specification at the same place to receive the same TV station signal or test signal, and then shorten the antenna length (be careful not to change the antenna direction) or remove the antenna, set the contrast and brightness knobs to the middle position, and the color saturation knob to the minimum position, and judge its sensitivity by observing the noise points when there is no signal on the fluorescent screen. Generally, there are many and thick black and white noise points that jump, indicating high sensitivity; sparse and small noise points, low sensitivity. The lead-free tin wire with many noise points will disappear immediately when a TV signal arrives, and a clear image will be presented. If there are noise points in the background of the image after there is a signal, it indicates that the signal-to-noise ratio of the machine is poor, and the relative sensitivity is not good, which is not an ideal situation.