Food Storage and Transportation

How CO2 can be effectively used to manage stored grain insect pests

The intelligent control and precise management of grain bin are the key to realizing safe and efficient grain storage. Using the grain bin sensor to build a smart grain system can save food while reducing the input of manpower and material resources.

gas sensor for Food Storage and Transportation

The use of CO2 gas storage technology in the granary is an effective grain storage technology, that is, filling the closed granary with CO2, changing the composition of the gas in the granary, destroying the ecological environment of pests and mycete, inhibiting the respiration of grain, and delaying the grain the effect of quality aging, so as to achieve the purpose of safe and environmentally friendly grain storage.

MH-410D  CO2 sensor

MH-410D  CO2 sensor

In the construction of the CO2 gas-controlled grain bin project, adopt a large-scale gas supply system for centralized gas supply, adopt automatic monitoring system for CO2 concentration in the grain bin. When the oxygen concentration is below 2% and the carbon dioxide reaches a certain concentration, the grain pests will die rapidly. The carbon dioxide concentration monitoring system mentioned here actually uses CO2 sensor, which is the most commonly used sensor type of grain bin sensor. The CO2 sensor outputs the corresponding CO2 concentration change signal to remind relevant personnel to adjust the carbon dioxide concentration in time. Zhengzhou Winsen Technology has independently developed and produced a variety type of CO2 sensors, such as: MH-410D infrared gas sensor:

One of the most advanced storage and preservation technologies: Modified Atmosphere Storage

Modified Atmosphere Storage is actually the abbreviation of controlled atmosphere storage and preservation of fresh agricultural products such as fruits and vegetables.It is one of the most common and most advanced storage and preservation technologies in the world.

gas sensor for Food Storage and Transportation

Modified Atmosphere Storage, also known as Controlled Atmosphere Storage, is on the basis of refrigeration, and increases the adjustment of gas components. Through the control of temperature, humidity, carbon dioxide, oxygen concentration and ethylene concentration in the storage environment,inhibit the respiration of fruits and vegetables, delay their metabolic process, so as to maintain the freshness of fruits and vegetables better, and prolong the storage period and fresh-keeping period. Modified Atmosphere Storage can usually prolong the storage period by nearly 1 times than that of ordinary cold storage; the fresh-keeping period (sale shelf life) after leaving the warehouse can be prolonged by 21 to 28 days, which is 3-4 times that of ordinary cold storage.

The key factors of the modified atmosphere storage includes:

  • The sealing of the cold storage. Controlled atmosphere is to add CO2 sensor and nitrogen sensor equipment to the cold storage to adjust the gas, prolong the fresh-keeping period of fruits and vegetables. The modified atmosphere storage requires extremely high sealing to prevent gas leakage and outdoor gas from entering.
  • Controllable air conditioning equipment. The main equipment of modified atmosphere preservation includes carbon dioxide generator, nitrogen generator, ethylene remover, oxygen remover, etc.

Fresh fruits and vegetables are living organisms after being harvested. During the storage process, they still carry out normal metabolic activities dominated by respiration, which is manifested as consuming oxygen, releasing carbon dioxide, and releasing a certain amount of heat. Therefore, controlling or adjusting the concentration of O2 and CO2 gas in the storage environment can greatly improve the storage life of certain fruit and vegetable.

ZE03-O2 O2 sensor

ZE03-O2  O2 sensor

Winsen's high-quality ZE03-O2 O2 sensor module, MH-Z16 CO2 sensor can accurately measure the concentration of oxygen, and carbon dioxide to adjust the atmosphere of the modified atmosphere storage, thereby prolong the shelf life of perishable food.

The smart grain bin of the future

On the basis of the existing digital temperature measurement, the grain situation monitoring early warning module of the warehouse management system should also integrate the automatic analysis function of the gas, humidity and pest detection of the grain pile, and the measured data should be written into the historical database to provide accurate decision-making for scientific grain storage. With the support of big data, an expert decision-making system for grain conditions is gradually established on this basis. When there is an abnormal change in the grain situation, the alarm sent by the system will be notified directly to the mobile phone of the relevant person in charge, and according to the digital model of the grain storage ecology in the region, after a comprehensive analysis of the system, it is recommended to deal with suggestions; even directly associated with equipment such as intelligent ventilation, fumigation and insecticide equipment, and modified atmosphere storage. After authorization, corresponding measures will be taken automatically to truly realize the perfect integration of "measurement" and "control".



NDIR CO2 Sensor MH-Z16

MH-Z16 is an NDIR CO2 sensor. The dual-channel structure enables MH-Z16 to effectively eliminate the influence of environment and light source factors on itself. Long-term stability is better.

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Electrochemical Oxygen Sensor ZE03-O2

ZE03 is a general-purpose and high-performance electrochemical module. It uses three electrodes, electrochemical gas sensor and high-performance micro-processor. By installing different gas sensor, the module could detect relevant gas. It is with built-in temperature sensor to make temperature compensation, which makes it could detect the gas concentration accurately. It has the digital output and analog voltage output at the same time which facilities the usage and calibration and shorten the development period. It is a combination of mature electrochemical detection principle and sophisticated circuit design, to meet customers' different detection needs.

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NDIR CO2 Sensor MH-410D

MH-410D is a CO2 sensor for working condition safety. It has no dependence on oxygen.

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Electrochemical PH3 Sensor ME3-PH3

ME3-PH3 electrochemical sensor detect gas concentration by measuring current based on the electrochemical principle, which utilizes the electrochemical oxidation process of target gas on the working electrode inside the electrolytic cell, the current produced in electrochemical reaction of the target gas are in direct proportion with its concentration while following Faraday law, then concentration of the gas could be get by measuring value of current.

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How to choose the right sensor for your project?

We have 17 sensor series, 200+ categories, and 300+ detection objects for gas detection. Such as CO, CO2, VOC, PM2.5, CH4, LPG and so on. In particular, we also have MEMS sensors. According to your industry application, gas principle, power consumption, accuracy, and range requirements, and we can select a specific model for you. You can also use the product filter below to choose a suitable product, or choose online serivce.

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The first six FAQs. Use the search bar above to reveal more!

How to Install and Place the Infrared Dust Sensor?

It must be installed vertically. Keep away from artificial air flow such as fans. When used in air purifiers, the front and rear of the fan cannot be installed. Optionally install it on one side of the shell, but keep vents on the shell to ensure that the external air can diffuse in.

Can the Two Voltages of Mq-7 Exist All the Time, or Do They Need to Be Powered Alternately? if It is an Alternate Power Supply, What is the Appropriate Power Supply Time?

It requires alternate power supply. Please check the information on the product manual. This sensor is powered by 1.5V and 5V alternately. The low temperature and low voltage (1.5V) state can detect CO, and the high voltage (5V) is the desorption process. The recommended 5V voltage duration is 60s, 1.5V voltage duration is 90s to alternately supply power. Since it is a desorption process at 5V, it is normal for the voltage to drop when CO is 150ppm.

What is the Difference Between Semiconductor Sensors and Electrochemical Sensors?

There is no good linear correspondence between the gas concentration and voltage of the semiconductor sensor, and it is generally only used for fixed-point calibration products; there is a good linear correspondence between the gas concentration and the output current of the electrochemical sensor, and can be made into quantitative detection products.
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