Application of temperature and humidity sensors
Food Industry: temperature and humidity is vital for food storage, temperature and humidity changes can bring food spoilage, leading to food safety problems temperature and humidity monitoring is beneficial to the relevant personnel for timely control.

File Management: paper products are extremely sensitive to temperature and humidity, improper preservation will seriously reduce the archival preservation years of use, that is, to form an environmental monitoring system, with exhaust fans, dehumidifiers, heaters, you can maintain a stable temperature, to avoid pests, moisture and other problems.

Greenhouse: the growth of plants for temperature and humidity requirements are extremely strict, improper temperature and humidity, plants will stop growing, or even die using with gas sensors, light sensors, etc. can form a digital greenhouse temperature and humidity monitoring system to control the relevant parameters in the agricultural greenhouse, so that the efficiency of the greenhouse to the maximum.

Animal Breeding: Various animals will show different growth states at different temperatures, and the goal of high quality and high productivity depends on a suitable environment to guarantee.

Tobacco Industry: tobacco raw materials in the fermentation process need to control the temperature and humidity, in the case of a convenient site environment can use wireless temperature and humidity sensors to monitor temperature and humidity, within the complex environment of the site, can use RS-485 and other digital transmission of temperature sensors to detect and control the temperature and humidity of the tobacco package to avoid pests, if the operation is not appropriate, it will cause a large loss of raw materials.

Industrial Control: mainly used for HVAC, server room monitoring, etc. Environmental control in buildings is usually temperature control, and there is a growing concern for achieving the best comfort environment with humidity control.

https://www.renkeer.com/temper....ature-humidity-senso

Environmental conditions for the growth of mushrooms
1. Nutrition
In addition to sufficient carbon source, mushrooms need more fast-acting nitrogen nutrition than Agaricus bisporus.

2. Temperature
The temperature range of mycelium growth is 20-38℃, and the optimum temperature is 26-32℃. The temperature range for the growth and development of mycelium is from 24 to 38C, and the optimum temperature is about 26 to 31C. The temperature of mycelium growth and substratum growth and development is almost the same, and mycelium from nutritional growth to substratum reproduction stage, do not need the cooling temperature stimulation, which is different from the characteristics of Agaricus bisporus.

3. Moisture
Because of the high growth temperature, fast growth rate and high mushroom production, the water requirement is more than the general species. The moisture content of compost during the period of mushroom development is about 65%. The water content of the mulch layer (sandy loam of vegetable garden) is about 22% during the period of mushroom emergence. The relative humidity of air is about 90% during the growth period.

4. Air
Due to the high temperature, respiration and humidity of mushrooms, special attention must be paid to the ventilation of the culture environment in order to meet the oxygen required for growth and to prevent the production of miscellaneous bacteria.

5. pH
Mushrooms grow and develop under high temperature conditions, and their own metabolism produces more acidic substances, while in a high temperature and high humidity acidic environment, it is conducive to the growth of miscellaneous bacteria. Therefore, delicious mushrooms are suitable to grow in alkaline environment, and the pH of compost and mulch layer should be adjusted to about pH 7.5.

6. Light
Mushrooms do not need direct light during the whole stage of mycelium and zygote growth and development.
Therefore, many growers have chosen to install mushroom breeding environment monitoring systems to facilitate monitoring to improve the growing environment and increase yields.

https://www.renkeer.com/mushro....om-breeding-environm

The benefits of negative oxygen ions for human body

The concentration of negative air ions is an important indicator of air quality, and its biological significance and health effects on human body have long been a common understanding, and one of the ecological benefits of forests is to increase the concentration of negative air ions. Many scholars have conducted systematic scientific studies on the changes of air negative ion concentration in different forest stands.

There are many factors that affect the concentration of negative oxygen ions, such as temperature, humidity, age of trees, depression, altitude, soil properties, water source, weather and other factors will have an impact on negative oxygen ions.

The benefits of negative oxygen ions to the human body
1.can activate the oxygen molecules in the air e gas, so that it is more easily absorbed by the body.

2. After the body inhaled oxygen-carrying negative ions, the lungs can increase the absorption of oxygen by 20%, the group more 14% of carbon dioxide emissions.

3. can change the body's responsiveness, active reticuloendothelial system function, increase the body's immunity.

4. Negative oxygen ions can make people's spirits, improve work efficiency, for sleep quality has a certain improvement effect, and has obvious analgesic effect.

5. Negative oxygen ions can effectively remove and neutralize methanol, toluene, - carbon oxide and other toxic gases, can protect human health.

6. Negative oxygen ions can form a protective layer of negative ions, effectively reduce the TV, computer generated high-voltage electrostatic damage to the eyes, can prevent myopia.

https://www.renkeer.com/negati....ve-oxygen-ion-detect

What are the weather sensors?

With the continuous development of meteorological modernization, various types of meteorological sensors are emerging. Whether in agriculture, industry or forestry, or scientific research, various types of sensors can be found. In the field of meteorological observation, what types of weather sensors are available? There are sensors for monitoring soil temperature and humidity, as well as sensors for monitoring air temperature, atmospheric pressure, and UV intensity. Let's take a brief look at the relevant types! What types of weather sensors are there?

They generally include air temperature and humidity sensors, rainfall sensors, snowfall sensors, visibility sensors, noise sensors, soil PH sensors, soil temperature and humidity sensors, soil nutrient sensors and dozens of other different types. As the equipment becomes more and more advanced, its measurement accuracy is getting higher and higher, and the installation method is getting easier and easier.

1. Air temperature and humidity sensor
This sensor consists of moisture and heat sensitive elements and is commonly used to measure temperature and humidity. Air temperature and humidity sensors can convert temperature and humidity signals into current signals or voltage signals for identification. Generally, it is widely used in food industry, tobacco industry, industrial control industry, greenhouse, plant and animal breeding and other fields.

2. Rainfall sensor
This type of sensor can automatically measure the amount of precipitation and count information such as the start and end time of precipitation and the intensity of precipitation. There are various types of rainfall sensors, such as tipping bucket type rainfall sensor, piezoelectric kinetic type rainfall sensor, etc. The device is widely used in agriculture, road traffic, forestry, hydrological monitoring and other fields.

3. Visibility sensors
In the field of transportation, visibility is a routinely observed meteorological parameter. Visibility sensors allow people to know how visible the road is and to confirm whether the road is suitable for traffic so that control centers can adjust the opening status in time. Visibility sensors are widely used in meteorological monitoring, harbor ships, cooling tower smoke monitoring, road and railroad tunnel air quality.

The above is a brief introduction to the three common weather sensors, currently in agriculture, forestry, industry and other fields for people to use dozens of types of sensing.

https://www.renkeer.com/top-16-weather-sensors/

Application areas of sensors in the Internet of Things

When it comes to the Internet of Things, we have to mention a variety of sensors, it is with their existence to get the information we need, its important role in the development of the economy and promote social progress is obvious.So what are the application scenarios of IoT sensors?

1.Equipment testing
In the industrial machinery and equipment, often susceptible to natural environment, work intensity time, operation and use of factors such as aging, wear and tear and other failures, resulting in a decline in performance, and even the birth of safety risks. The sensor can detect these machinery and equipment at any time, to understand its performance, use, and prejudge the possible problems in advance.

2. Environmental detection
Through sensors, it is possible to detect the air environment, soil composition, light conditions, weather conditions, etc. So as to realize the scientific and intelligent management of agriculture and livestock, in order to improve the yield and quality of agricultural products. In addition, environmental detection sensors, can also better help hydrology, geography, scientific research and other industries, easier and more accurate data collection, research and management.

3.Logistics detection
In the field of logistics, through handheld sensor scanning, courier barcode information can be read directly, including the place of shipment, destination and other information, etc. The logistics status can also be updated and passed to the server side to finally achieve seamless tracking of logistics management. In addition, sensors can be installed in the logistics body to achieve positioning, so as to check the location of logistics delivery vehicles at any time.

4.Security detection
Whether it is special security for large events or daily security for the community, with the help of sensor devices, it can detect people entering and leaving at any time and verify identity information through face recognition. Then through intelligent cameras to detect the surrounding environment, and achieve early warning of abnormal conditions, so that security personnel respond in advance to increase security and reduce the probability of emergencies.

5. Health detection
The smart bracelets and watches we are currently using belong to the health detection sensors, which are connected with cell phones and aim to detect and analyze the data of our daily exercise, travel, health and sleep. Then combined with the server side of the big data system, to provide more reasonable, healthier exercise, life guide, so as to improve everyone's health index.

In general, the application scenarios of IoT sensors will become more and more common and normalized in everyone's daily life with the continuous popularization of IoT technology. This is both the inevitable trend of social development and the inevitable result of user demand.
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