Laboratory temperature control

First of all, identify the requirements of each work for environmental temperature and humidity.  

It mainly identifies the needs of instruments, reagents, experimental procedures, and the humanized considerations of laboratory staff (the human body generally feels comfortable in the range of 35-80% relative humidity at a temperature of 18-25 °C, and there is a certain causal relationship between environmental dryness and throat inflammation from a medical point of view), and lists the requirements for temperature and humidity control range.

Second, select and develop an effective environmental temperature and humidity control range.

The narrowest range of the requirements of all the above elements is selected as the allowable scope of the laboratory's environmental control, the management procedures for environmental condition control are formulated, and a reasonable and effective SOP is formulated according to the actual situation of the department.

Third, keep and monitor.

Through various measures to ensure that the temperature and humidity of the environment are within the control range, and the ambient temperature and humidity are monitored and monitored, and timely measures are taken to adjust the temperature of the air conditioner and the dehumidifier to control the humidity beyond the allowable range.

Take, for example, a laboratory

Reagent room: temperature 10-30°C, humidity 35%-80%

Sample storage room: temperature 10-30°C, humidity 35%-80%

Balance chamber: temperature 10-30°C, humidity 35%-80%

Moisture chamber: temperature 10-30°C, humidity 35%-65%

Infrared chamber: temperature 10-30°C, humidity 35%-60%

Central Laboratory: Temperature 10-30°C, Humidity 35%-80%

Sample retention chamber: temperature 10-25°C, humidity 35%-70%

Optimal range of temperature and humidity for laboratories in various fields

Pathology Laboratory

In the process of pathology experiments, the use of microtome, dehydrator, dyeing machine, and electronic balance instrument has relatively strict requirements for temperature. For example, electronic balances should be used as much as possible under conditions where the ambient temperature is relatively stable (temperature change is not more than 5°C per hour). Therefore, the temperature and humidity conditions of such laboratories need to be monitored and recorded in real time. The DSR temperature and humidity recorder provides accurate temperature and humidity recording data, which helps to run smoothly in various experiments.

Antibiotic laboratories

There are strict requirements for temperature and humidity environment, generally the cold place is 2~8 °C, and the cool place does not exceed 20 °C. Antibiotic inactivation can be caused by high or low storage temperatures, and the inactivation temperature of different types of antibiotics is also different, so the monitoring and recording of temperature and humidity recorders in such laboratory environments is an important link.

Chemical testing room

The chemistry laboratory contains a variety of laboratory rooms, such as chemical testing room, physical testing room, sampling room, etc. The temperature and humidity standards of each room are different, and each room needs to be monitored regularly, usually twice a day. Using the DSR temperature and humidity recorder, through a professional networking connection, the staff only needs to check the temperature and humidity status of each laboratory in the central console, and download and save the temperature and humidity numbers in the experimental process.

Laboratory animal room

The environmental requirements of the animal laboratory are mainly laboratory animals, and their humidity should be maintained between 40% ~ 60% RH, taking mice as an example, if they live in an environment with a relative humidity of less than 40%, it is easy to get sick and fall off and die. The DSR temperature and humidity pressure difference recorder can establish a temperature and humidity monitoring and recording system through networking alarm and other measures, which is conducive to the control of pressure difference, temperature and humidity in the animal room, and prevents the spread of diseases and avoids mutual infection of animals.

Concrete Laboratory

Temperature and humidity have a definite effect on the properties of some building materials, so the environmental conditions under which materials are tested are specified and must be observed in many standards. As stipulated in GB/T1 7671 1999, the laboratory temperature should be kept at 20 °C ± 2 °C and the relative humidity should not be less than 50% RH during the molding of the test body. Use DSR temperature and humidity recorder. A temperature and humidity monitoring and recording system can be established according to the laboratory's own conditions to strengthen the temperature and humidity control of the laboratory.

Accreditation & Metrology Laboratory

Certification and metrology laboratories need to record the changes in temperature and humidity in the whole process of inspection in real time when implementing inspection, identification, testing and certification services, and the use of DSR temperature and humidity recorder can simplify the recording work, save costs, and the recorded data will not be interfered with by too many human factors, and can objectively and truly reflect the testing process. The accuracy of the temperature and humidity control of the test environment and equipment has a significant impact on the accuracy and repeatability of the experimental results. GLP, GAP, CNAS, ISO17025, ISO15189, ISO17020, ISO9000, ISO16949, ISO14000 and other certifications are the basic requirements for the laboratory environment, and ZOGLAB's products meet the requirements, precise monitoring and provide high-precision and tamper-proof original records.

Reasons for temperature control in the laboratory

According to the standard specified in GB/T4857.2-2005, the temperature of the laboratory should be controlled at about 21°C-25°C, and the relative humidity should be controlled at about 45%-55% to meet the basic experimental requirements.

From the perspective of the indoor environment of the laboratory, the situation that can lead to sharp temperature difference and excessive humidity is almost non-existent, so the short-term control degree of the temperature and humidity regulator is very demanding, and it is strictly controlled from the methods of cooling, heating, humidification and dehumidification.

At the same time, from the perspective of the external environment, the temperature and humidity changes in the laboratory will be affected by external conditions, such as the climate characteristics of the region, the temperature difference between day and night, and the influence of various special weather, resulting in high and low changes in temperature and humidity. Therefore, in order to ensure the balance of temperature and humidity and meet the experimental standards, the laboratory needs to seal and isolate the external environment from any unexpected situation that may lead to indoor air changes, strictly require the management personnel to regularly exchange the timing of fresh air, prohibit the pollution of the indoor environment by the negligence of personnel, and measure the temperature of the use environment of lighting equipment and precision instruments to ensure that the indoor temperature and humidity reach the specified deviation.

In particular, the relative humidity change of the laboratory is strictly controlled, because there are no other conditions in the laboratory air that cause temperature and humidity differences, and as long as the temperature of the air changes by 1.0 °C, it will lead to a large change in relative humidity and affect the normal operation of indoor instruments. Even a temperature difference of just 0.2°C can cause a humidity change of more than 0.5%.

Therefore, laboratories that are very sensitive to temperature and humidity need to use professional sensors to strictly control deviations, especially for accurate monitoring of humidity. There are two kinds of sensors, one is the temperature sensor, which is relatively accurate; The other is the humidity sensor, which will be inaccurate under certain conditions, and the humidity of the air must be monitored regularly to ensure accuracy. At the same time, it is important to pay attention to the uniformity of the entire temperature and humidity control area when constructing the laboratory.

For the control of environmental factors such as cleanliness, light, ventilation, vibration, noise and other environmental factors in the laboratory, you can refer to the above laboratory temperature and humidity control methods.