As a device that can accurately simulate different temperature and humidity environments in a small space, the benchtop temperature humidity chamber is favored by researchers and enterprises. However, in the face of a wide range of products on the market, how to choose a suitable desktop temperature and humidity room has become a challenging task. This article will provide you with a comprehensive guide to help you make an informed choice.
Before starting to select a benchtop environmental chamber, the first and most critical step is to clarify its specific application needs. Different experimental or production processes have completely different requirements for the control range, accuracy and uniformity of temperature and humidity. For example, in some seed germination experiments with high humidity requirements, the humidity control accuracy may need to reach within ±2%RH; In general electronic component stability testing, temperature control at ±1°C, humidity control at ±5%RH may be able to meet the needs. Therefore, careful consideration of the precise temperature and humidity requirements of your work is the cornerstone of determining the right equipment.
In addition, it is also necessary to pay attention to the volume and quantity of the sample or product during the experiment or production process. If multiple large samples need to be tested simultaneously, the internal working space of the benchtop temperature humidity chamber must be spacious enough to ensure that the samples can be properly placed and do not interfere with each other's uniform distribution of temperature and humidity.
Temperature range is an important consideration, common benchtop temperature humidity chamber temperature range is generally between -20°C to 80°C, some special applications may require a wider range, such as some materials for low temperature aging tests may require temperatures as low as -40°C. The fluctuation and uniformity of temperature can not be ignored. The smaller the fluctuation, the higher the stability of temperature. The better the uniformity, the more you can ensure that the samples at all locations in the room are in the same temperature environment. For example, in high-precision chemical analysis experiments, the temperature fluctuation should be controlled within ±0.3°C and the uniformity within ±0.5°C to ensure the reliability of the experimental data.
The humidity range is usually 20%-95% RH is more common. The control accuracy of humidity is similar to that of temperature, and for some moisture-sensitive experiments, such as drug stability testing, the humidity control accuracy needs to reach within ±3%RH. At the same time, pay attention to the control ability of the equipment in low humidity and high humidity environments. Some equipment may have dew condensation in low humidity environments, affecting the accuracy of humidity control and normal operation of the equipment.
In some experiments or production processes, it is important to quickly reach the set temperature and humidity conditions. For example, in some rapid thermal cycling tests, the equipment is required to have a high rate of heating and cooling.
High-quality benchtop temperature and humidity room should have good thermal insulation performance, the chamber shell is usually made of double-layer stainless steel, and the middle is filled with efficient thermal insulation materials, such as polyurethane foam, to reduce heat transfer, reduce energy consumption and improve temperature stability. The inner chamber is mostly made of stainless steel plate, which has good corrosion resistance and easy cleaning, and can adapt to different experimental environments and sample needs.
The tightness of the door is directly related to the control effect of temperature and humidity. A door structure with good sealing performance should be selected, such as the use of silicone seals, and equipped with a reliable door lock device to ensure that the door is closed tightly during the experiment to prevent the intrusion of external air and the leakage of internal temperature and humidity. In addition, some equipment is also equipped with an observation window, which is convenient for users to observe the state of the internal sample without opening the door, and the material of the observation window should have good thermal insulation and anti-fog performance.
Reasonable design of air duct system helps to ensure the uniformity of temperature and humidity. The air duct should be able to make the air flow evenly circulate in the chamber to avoid the situation of dead corners and local temperature and humidity differences. Generally, centrifugal fans or axial flow fans are used as power sources, and well-designed air duct layout is used to make the air flow evenly distributed to all corners of the chamber after heating or humidifying elements.
At present, the common controllers on the market are traditional push-button controllers and intelligent touch screen controllers. The touch screen controller is easy to operate and intuitive. It can display the temperature and humidity curve and device running status in real time, and has the data storage and export functions, which is convenient for users to analyze and manage experimental data. The push-button controller is relatively simple, the price is also relatively low, suitable for some users who do not have high requirements for control functions.
Advanced control algorithm can improve the control precision and stability of temperature and humidity. For example, the PID (proportional integral-differential) control algorithm can automatically adjust the heating, cooling, humidification and dehumidification power according to the deviation between the actual temperature and humidity and the set value, so that the temperature and humidity can be quickly stabilized within the set range. Some high-end devices may also use fuzzy control algorithms or neural network control algorithms to further improve control performance.
The control system should have perfect safety protection functions, such as over-temperature protection, ultra-wet protection, power failure protection, etc. When the equipment is abnormal, it can stop operation in time and send an alarm signal to protect the safety of the equipment and internal samples. For example, when the temperature exceeds the set upper limit, the overtemperature protection device should immediately cut off the heating power supply and initiate cooling measures to prevent equipment damage or sample failure due to high temperature.
Choosing a well-known brand of benchtop temperature and humidity room can usually obtain better protection in terms of product quality and after-sales service. Well-known brands often have many years of research and development and production experience, and their products have been tested by the market and recognized by users. By reviewing user reviews, industry reports and consulting with relevant professionals, you can understand the word-of-mouth and market share of different brands, so that you can make more reliable choices.
Good after-sales service is essential for the long-term stable operation of the equipment. When purchasing equipment, you should understand the after-sales service provided by the manufacturer, such as the warranty period, maintenance response time, whether to provide on-site service and whether there are sufficient spare parts. Some manufacturers will also provide users with operational training and technical support to help users better use and maintain the equipment.
To sum up, the selection of the right benchtop temperature humidity chamber needs to consider the application needs, performance indicators, equipment structure, control system and brand after-sales and other factors. Only by comprehensively weighing these points, combined with their own actual situation and budget, can we select a benchtop temperature humidity chamber with excellent performance, stability and reliability, and in line with their own needs, to provide strong support and guarantee for scientific research and production activities.
Since 2009, Xi 'an LIB environmental simulation industry has emerged in the field of environmental test chambers, integrating design, manufacturing, global sales and service. After the completion of the test chamber, it goes through performance testing, functional verification, debugging and calibration, and issues detailed reports for each step to ensure flawless quality. All LIB products have been awarded CE and ROHS certification, as well as authoritative certifications in other countries.
You can contact us directly for detailed information and a quote on the bench temperature and humidity test chamber.
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