Composite sensitive functions - observation of natural phenomena around new sensor, a common signal with sound, light, electricity, heat, power, chemical and other. Sensor measurements are generally in two ways: direct and indirect measurements. The intelligent sensors with complex function that can simultaneously measure a variety of physical and chemical quantities given substance can be more fully reflect the movement of information. Photosensor is one of the most common sensor, its wide variety, are: photocell, photomultiplier, photoresistor, phototransistor, solar cells, infrared sensors, ultraviolet sensors, fiber optic photoelectric sensors, color sensors, CCD and CMOS image sensor. It is sensitive to wavelengths in the visible wavelength nearby, including infrared and ultraviolet wavelengths. Light sensor is not limited to the light detection sensor, it can be used as the sensing element composed of other sensors optical sensors, for many non-power testing, as long as these non-electricity is converted to an optical signal can change. Optical sensor is one of most productive, the most widely used sensors, which occupies a very important position in the automatic control and non-power electrical measurement technology lead in. The simplest light sensors [2] is photosensitive resistance, junction when photons impact will generate electricity. Capacitive level sensor consists of a capacitive sensor and an electronic module circuit, it is a two-wire 4 ~ 20mA constant current output as the base type, the converted sensor brand, it can output three-wire or four-wire mode, the output signal is formed from 1 to 5V, 0 ~ 5V, 0 ~ 10mA and other standard signals. Capacitive sensor consists of insulated electrode and the cylindrical metal container filled with the measuring medium components. When the material level rises because the dielectric constant of the non-conductive material is significantly less than the dielectric constant of air, so the capacitance change with altitude change material. Module circuit sensor by the reference source, pulse width modulation, conversion, constant current amplification, feedback and current limiting unit. The advantage of using the principle of pulse width modulation special measure is to lower frequencies, radio frequency interference on the surrounding elements, good stability, good linearity, no significant temperature drift. Angle sensors, Jiangxi sensor, Xinxiang City, Xinfeng Xinfeng purification Sensing Technology Limited. Xinxiang City, Xinfeng purification Sensing Technology Co., Ltd. (www.xfcgq.com) (www.xfcgjh.com) strong, credible, in Xinxiang sensor industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement will lead Xinfeng innovative ideas into the brilliant and you work for a better future!