A while ago, affected by various factors, the price of vegetables in many places soared all the way, and even "vegetables were more expensive than meat" at one point. As the weather gets colder, how to ensure sufficient supply and stable prices of vegetables in winter has become a social concern.


Most of the supply of "vegetable baskets" in autumn and winter comes from greenhouses, which mainly achieve high yields and increased income of crops by artificially creating an ecological environment suitable for crops and adjusting the production season of crops.


In greenhouses, in addition to paying attention to the changes in temperature and humidity, it is also necessary to strengthen the monitoring and management of harmful gases in the greenhouse. In winter, greenhouses are often in a closed state for heat preservation, resulting in a relative blockage between the air in the greenhouse and the outside air, and it is easy to store a large amount of toxic gases. These toxic and harmful gases are difficult to detect and distinguish using conventional means, and often require the help of gas sensors. So what harmful gases need to be monitored in greenhouses?


1. Ammonia (NH3) monitoring


Ammonia is produced by the fermentation and decomposition of organic fertilizers in greenhouses. The application of ammonium carbonate can also volatilize ammonia. When the concentration of this gas in the air reaches 0.1%~0.8%, it can harm vegetables, causing the leaf margin tissue to gradually turn brown and even die.


Zetron RS-NH3-*-2-* ammonia transmitter uses imported first-line brand chips, which are quick and sensitive to respond, and have strong anti-interference ability. After our company's unique compensation algorithm and multi-stage standard gas calibration, it has the characteristics of long life, high precision, high repeatability and high stability. According to the needs, three ammonia transmitters with different measurement ranges of 0-50PPM, 0~100PPM, and 0~500PPM can be selected, with high measurement accuracy. A high-quality OLED display can be selected, and the values can be directly viewed on site, and can be clearly displayed at night. It supports uploading gas monitoring data to the environmental monitoring platform in real time to realize the intelligent control of ammonia gas in the greenhouse.


2. Sulfur dioxide (SO2) monitoring


Sulfur dioxide gas is mainly produced by burning coal with a high sulfur content. This gas is very harmful to crops. Excessive concentration will cause cell death between the leaf margins and veins of plants, forming small white or brown dead spots, and in severe cases, the leaves will wilt. Especially in the daytime with high temperature, strong light and high soil moisture, the harm is the most serious.


RS-SO2*-N01-2-* sulfur dioxide transmitter uses original imported sensors, with high measurement accuracy within ±3%FS, repeatability within 2%, fast and sensitive response, and multiple measurement ranges available (0-20ppm, 0-2000ppm). After our company's unique compensation algorithm and multi-stage standard gas calibration, the consistency is good. Optional high-quality OLED display, the value can be directly viewed on site, and it can also be clearly displayed at night. It supports uploading gas monitoring data to the environmental monitoring platform in real time, and remotely checking the sulfur dioxide gas concentration in the greenhouse at any time.


3. Nitrogen dioxide (NO2) monitoring


Nitrogen dioxide is also known as nitrous acid gas. When too much ammonium nitrate is applied and nitrification is difficult to carry out, nitrogen dioxide gas will be released from the soil. Some crops are sensitive to this type of gas, and vegetables will be harmed when the concentration reaches a certain level.


RS-NO2-*-2 nitrogen dioxide transmitter uses imported first-line brand electrochemical sensors, which are stable and durable. A variety of ranges (0-20ppm, 0-2000ppm) are available, and its measurement accuracy is guaranteed, with an accuracy of ±3%FS and repeatability of ±2%. After our company's unique compensation algorithm and multi-stage standard gas calibration, it also has the characteristics of long life, high precision, high repeatability and high stability. Optional high-quality OLED display screen, the value can be directly viewed on site, and it can also be clearly displayed at night. Supports real-time uploading of gas monitoring data to the environmental monitoring platform, and remotely checks the nitrogen dioxide gas concentration in the greenhouse at any time