Sensor for VOCs

Abstract

The invention discloses a sensor for VOCs. The sensor for VOCs comprises a main controller, a power source, a sampling and power-supplying module, a displayer, a sensor signal inputting and amplifying module, a RS485 module, a keyboard and a 4-20-mA analog quantity output module, wherein the power source is of an independent structure and separately supplies power to the main controller, the displayer, the 4-20-mA analog quantity output module, the RS485 module and the keyboard; the special sampling and power-supplying module is arranged for the sensor signal inputting and amplifying module; and the charge and discharge control signals of the sampling and power-supplying module are allowed to enter the P1.0 port of the main controller. The sensor for VOCs is simple in structure and low in cost, is a convenient and sensitive detection means, presents incomparable advantages in detection of gas leak with extremely low concentration compared with sensors of other types, and has good practicality.

Description

technical field [0001] The invention belongs to the field of sensors, in particular to a VOCs sensor. Background technique [0002] In my country, VOCs (volatile organic compounds) refer to organic compounds with a saturated vapor pressure greater than 70Pa at normal temperature and a boiling point below 260°C at normal pressure, or a corresponding volatile compound with a vapor pressure greater than or equal to 10Pa at 20°C. all organic compounds. With the development of society, air pollution is becoming more and more serious, and volatile organic compounds emitted by enterprises are one of the important reasons for environmental air pollution, especially in chemical industry parks. In order to achieve a sustainable development strategy, strengthening environmental protection has become a basic national policy of our country. Therefore, real-time monitoring of VOCs is required. At present, the most common VOCs sensors generally use lithium battery power supply schemes in o...

AI Technical Summary

Problems solved by technology

In order to achieve a sustainable development strategy, strengthening environmental protection has become a basic national policy of our country. Therefore, real-time monitoring of VOCs is required. At present, the most common VOCs sensors generally use lithium battery power supply schemes to improve system stability, but the price is high. Moreover, the battery needs to be replaced frequently, which is inconvenient to use

Images