The Temperature and Humidity Data Logger is one of the temperature and humidity meters in the temperature and humidity measuring instrument. It has a built-in temperature and humidity sensor or can be connected to an external temperature and humidity sensor to measure temperature and humidity.
development of
Early temperature recorders were all paper-type – that is, paper temperature and humidity recorders.
With the popularity and wide application of computers, temperature and humidity paperless recorders are produced, and because of its more accurate data recording, more convenient data storage, and more convenient data analysis functions, the market share has increased year by year; The paperless temperature and humidity recorder with USB interface is very convenient for downloading and saving data.
The U disk temperature and humidity recorder introduced in recent years has made the temperature and humidity recorder miniaturized to the extreme. The wireless temperature and humidity recorder also enables multi-point temperature and humidity recording and management in a certain area.
With the development of the Internet of Things and cloud technology, there are GPRS-type real-time upload data temperature recorders. Users can view data and download data anytime and anywhere through a computer browser or mobile phone app. When the data exceeds the limit, users can also receive SMS reminders. The development of cloud storage has improved the quality of the temperature recorder. The recorder has also added a positioning function. Based on the positioning of the base station, it can not only record the temperature but also indicate the position coordinates of the device. This function is widely used for cold chain transportation.
classification
Recording method
name
Recording and storage
Characteristics
Paper temperature and humidity recorder
mechanical
The purpose of recording and saving data is to draw a curve on the recording paper by a mechanical stylus.
Record paper saves the data.
Paperless temperature and humidity recorder
Electronic
A microprocessor, display and memory are used. It is the earliest title or collective name of all electronic temperature recorders.
The memory holds the data.
The display mode can be digital or graphic, and the display screen can be black and white, blue screen or color.
Can also be without a display screen, such as a button temperature recorder or a disposable U disk temperature recorder
Massive temperature and humidity recorder
Electronic
It consists of microprocessor, LCD, SD or TF card memory. It comes with a file system. The data is directly stored as files, such as .txt and .doc files. It is not limited by the number of traditional record groups of several thousand or tens of thousands. Mass storage is achieved according to the capacity of the memory card.
The cloud storage temperature and humidity recorder cloud storage uploads data to the cloud server in real time through GPRS to realize data cloud storage. Users can query data anytime, anywhere, and download data for report printing. Storage capacity is not limited by device hardware, enabling true unlimited data storage.
Installation method
name
Volume and installation method
Characteristics
Fixed temperature and humidity recorder
Large, fixed or rack mount
AC220V power supply
Portable temperature and humidity recorder
Small size, easy to carry, can be hung or placed in any position
Battery or rechargeable battery
U disk temperature and humidity recorder
In addition to its portable features, it also has the shape and working mode of the USB flash drive: it can be directly plugged into the USB interface of the computer to download data without any connecting cable.
Massive temperature and humidity recorder
Battery or rechargeable battery power supply, in addition to the portable features, also comes with a file system, you can view and import data without any special software, including mobile phones, PDAs and other electronic devices to view data, more convenient to use, storage data volume It is also very large, equivalent to a massive record.
Cloud storage temperature and humidity recorder power adapter power supply or car cigarette lighter power supply, you can also charge Po power supply, completely realize the data recorded anywhere, anytime.
Portable temperature and humidity recorder
transfer method
name
Data transmission method
Characteristics
Temperature and humidity loggers
Wired or USB flash drive
Transfer or download data to a computer via RS232, RS485, USB, etc., or a USB flash drive;
Massive temperature and humidity recorder
TF card reader
Simply insert the record card into the computer and do not need to move the recorder; the built-in file system does not require special software to import data.
Wireless temperature and humidity recorder
wireless
The recorded stored data is transmitted wirelessly to the receiver, and the data is transmitted to the computer through the receiver's USB interface.
A wireless temperature recorder is a basic device that constitutes a wireless temperature recording network.
Cloud Storage Temperature and Humidity Recorder GPRS Upload data to the cloud server in real time via GPRS for data cloud storage. Users can query data anytime, anywhere, and download data for report printing. Storage capacity is not limited by device hardware, enabling true unlimited data storage.
typical application
Food storage and transportation
Since the storage and transportation time of food is not a short-term problem, the relative equilibrium humidity in food preservation is an important indicator to ensure food safety. The relative equilibrium humidity directly affects the growth of colonies. For example, in the range of equilibrium relative humidity of 95% RH to 91% RH, the colonies that are easy to grow are Salmonella, Blint, Lactobacillus, Mold and Yeast. The food preservation cycle is also related to temperature and equilibrium relative humidity. The balance of the relative humidity value is 81% RH. The shelf life is 14 days at 27 °C and 24 days at 21 °C. If the equilibrium relative humidity is increased to 85% RH, these The indicator will be reduced to 8 days at 27 °C and 12 days at 21 °C. The equilibrium relative humidity of the hygroscopic material plays a decisive role. Balanced relative humidity is defined as the humidity value obtained by the surrounding air when the substance is not exchanged with water in the air. This definition is clear, in order to successfully store and maintain these products, environmental climate control and packaging must be carefully specified. At the same time, many foods are stored in too dry conditions, and their taste will be somewhat deteriorated. In response to this situation, it is required to record changes in temperature and humidity in real time to ensure food safety enters the consumer's mouth.
When transporting frozen or refrigerated foods over long distances, it is very important to prove that the goods are always in the specified temperature and humidity conditions when receiving. The solution to the dispute is to put a recorder in the cargo compartment at the time of shipment and start it. The temperature and humidity recorder has a sophisticated internal clock that faithfully records the temperature and humidity data at specified intervals, which can be easily removed when removed. Use the computer to check the graphic files and alarm values ​​to determine whether the allowable value is exceeded, when and how long the time can be easily obtained, and the carrier is immediately aware of whether it is responsible.
museum
This is another big area of ​​application for temperature and humidity products, and the recorder is a very distinctive product among them. The paper of the file can be stored for a long time under the conditions of suitable temperature and humidity. Once the temperature and humidity conditions are damaged, the paper will become brittle, and the important information will disappear. It is necessary to record the temperature and humidity of the archives. Prevent the occurrence of a malignant accident. The use of temperature and humidity recorders will simplify the work of recording temperature and humidity, and will also save the cost of cultural relics storage, so that this work can be scientifically scientific and not subject to excessive human factors. Under the premise of ensuring minimal damage to art, cultural relics, including their color and shape, are not damaged.
Building materials experiment
In the drying process of building materials, especially concrete, we should pay attention to the drying trend, which is one of the indicators for evaluating products, and also provides reliable data for the construction party. This data can be recorded and provided to the building materials researcher using the temperature and humidity recorder, which will provide useful help for the construction. Especially in military buildings, time is life, accurately grasping the concrete drying time as the first enemy, providing a guarantee for effectively providing the living force to the battlefield.
Acceptance of intelligent buildings. Due to the many acceptance projects in the construction industry, in addition to the HVAC indicators, other construction departments such as ray intensity and formaldehyde concentration are required to be monitored in accordance with human health indicators. These indicators are directly related to human health. If these indicators are unclear, the testers rush into these places and record them for a long time, which is irresponsible for the tester's personal health, and the application recorder will ensure that the test is obtained while obtaining reliable data. The personal safety of personnel is maximally protected.
Agriculture, forestry and animal husbandry
Application of agriculture, forestry and animal husbandry: agriculture, forestry and animal husbandry production, especially the production of some economic crops, in which the temperature and humidity values ​​should be recorded in detail during the seedling period. In agricultural applications, the acid-alkaline environment caused by the harsh environment--fertilizer, feces, etc. causes the humidity product to drift beyond other environments, thus requiring less humidity-sensitive capacitance drift and convenient calibration of the whole machine.
Medical institution
According to the requirements of "Hospital Cleansing Department Building Technical Specifications", the temperature and humidity of the operating room must be controlled within a certain range: temperature is 22...25 °C; relative humidity is 45% RH...60% RH. Appropriate ambient temperature and humidity are very important for both the operator and the patient. When the room temperature exceeds 28 ° C and the humidity is greater than 70% RH, it is easy to have reactions such as stuffiness, sweating, irritability, fatigue, etc., which easily affects the stable mood and agile thinking, so that the skill level of the operator cannot be well played. At the same time, the patient may have symptoms such as rapid heart rate and sweating, which increases the difficulty of surgery; when the room temperature is lower than 20 degrees, the operator wearing only the surgical gown may feel cold and easily affect the sensitivity and accuracy of the operation, especially The subtle movements of the fingers. The exposed patient is at a lower level due to the resistance of the wound body, and is more prone to complications such as a cold. The indoor humidity is low, and the floating dust on the surface of the object is suspended in the air with some movements such as paving the door, opening and closing the door, etc. The temperature difference between the inside and outside of the operating room is large. The air in some areas after the opening of the door forms a vortex, and the wind speed increases to about 4 times the original wind speed in the operation room. At this time, the surface attachments quickly float in the air. According to a survey conducted by the US CDC, there is a risk of airborne infection when the number of floating bacteria in the operating room air is 700-800 cfu/m3. It can be seen from the results that the air pollution is most serious 2 hours after the operation from the time of the operation to the time of the single order, which is the surgical stage. Due to the effect of gravity, indoor dust can be directly deposited on the surgical wound, or the operator's hand or surgical instruments. Therefore, it is important to strengthen the control of air pollution during this period to prevent postoperative wound infection. These requirements require the health and epidemic prevention departments to confirm the compliance of the operating rooms of each hospital through their own monitoring. The recorder is a good method, which reduces the waste of personnel and ensures the fairness of law enforcement.
Pipeline maintenance
Moisture in the pipeline promotes microbial growth, and mold on the pipeline is formed as such. This not only affects air flow, but also breeds a lot of bacteria. These contaminated areas pose a threat to health and ultimately lead to a deterioration in indoor air quality (IAQ). The solution medium temperature and humidity recorder can also play a big role.
Glass Ashtray
Glass Ashtray
Xi'an ATO International Co., Ltd , https://www.xianato.com