Recommended third-party laboratory use for constant temperature and humidity weighing system

Description :

　　Qingdao Lubo is an environmental monitoring instrument manufacturer that develops various environmental detection instruments. The manufacturer's online quotation is the market price. Please feel free to inquire about the discounted price for more details

　　Constant temperature and humidity weighing system

　　What is the difference between a low concentration particulate matter sampler and a regular one?

　　1. Low concentration smoke and dust are sampled using filter membranes, while ordinary smoke and dust are sampled using filter cartridges

　　2. The sampling flow rate of the low concentration host sampling pump can reach 100L/min, while the ordinary smoke and dust host can only reach 70L/min

　　3. Sampling gun: The low concentration sampling gun uses a specialized probe for filter membrane sampling. Ordinary models cannot accommodate filter membranes and can only accommodate filter cartridges

　　Scope of Application

　　This system is suitable for the cultivation and preservation of molds, microorganisms, antibiotics, and tissue cells; Research on plant cultivation, breeding experiments, enzymology, and enzyme engineering; Special equipment for the preservation and testing of biological products, vaccines, blood, and various specimens.

　　structural characteristics

　　1. The interior is made of mirror stainless steel, and the four corners of the semi-circular arc are easy to clean. The spacing between the shelves inside the box is adjustable.

　　2. The microcomputer temperature and humidity controller controls temperature and humidity, ensuring stability and reliability.

　　3. Forced circulation air duct ensures uniform temperature in the working room

　　4. The air duct is equipped with heaters, refrigerators, dehumidifiers, humidifiers, and temperature and humidity sensors.

　　5. Double layered glass door observation window, equipped with lighting inside the box for easy and clear observation.

　　Main technical parameters

　　Model: LB-350N

　　Temperature control range: 5-50 ° C

　　Temperature fluctuation: ± 0.5-1.0 ℃

　　Humidity range: 45~95% RH

　　Humidity fluctuation: ± 5% RH

　　Power consumption: 1300W

　　Dimensions (length x width x height): 1300mm x 730mm x 1580mm

　　Power supply: 220-240VAC 50/60HZ

　　Requirements for the detection limit of the new standard

　　The detection limit of HJ836-2017 "Determination of Low Concentration Particulate Matter in Exhaust Gas from Fixed Pollution Sources by Weight Method": The modified content of "Determination of Particulate Matter in Fixed Pollution Sources and Sampling Methods for Gaseous Pollutants" (GB/T16157-1996): Add "1.2 When determining the concentration of particulate matter in exhaust gas from fixed pollution sources, if the concentration is less than or equal to 20mg/m3, it is applicable to HJ836 (Determination of Low Concentration Particulate Matter in Exhaust Gas from Fixed Pollution Sources by Weight Method). When the concentration is greater than 20mg/m3 and does not exceed 50mg/m3, the measurement result shall be expressed as"<20mg/m3

　　Product Overview:

　　The LB-350N low concentration weighing constant temperature and humidity equipment is designed to meet the requirements of the new national standard HJ836-2017 "Determination of Low Concentration of Fixed Pollution Sources by Weight Method" of the Ministry of Environmental Protection regarding the weighing conditions after sampling. A high-precision balance is placed in a constant temperature and humidity environment, and the sample to be weighed is placed in a constant temperature and humidity chamber for 24 hours to balance before weighing. This product solves the problem of the influence of temperature and humidity changes in the laboratory environment on the weighing results of samples, greatly improving the accuracy of weighing sample results. This product is also used for weighing other samples with high requirements for symmetrical environments.

　　Key Features:

　　The temperature and humidity control accuracy of U is high, meeting the requirements of national standards HJ836-2017 and HJ656-2013. The temperature fluctuation is ± 0.2 ℃, and the humidity fluctuation is better than ± 2.0% RH. The instrument uses a Swiss Rotronic temperature and humidity transmitter, with a temperature deviation of ± 0.4 ℃ and a humidity deviation of ± 1.5% RH.

　　The stability process of the U system is short, and the filtering process takes less than 30 minutes. After stabilization, weighing tests can be conducted at any time without waiting for the compressor to shut down like some products before weighing.

　　The human-machine interface adopts a 4-inch color touch screen, which is beautiful and durable. It displays temperature and humidity values truthfully and can view temperature and humidity fluctuation curves separately through temperature and humidity curves. Historical temperature and humidity data can be recorded and viewed through tables.

　　The constant temperature and humidity box adopts a reasonable circulating air method, with soft wind and reasonable wind direction, which not only ensures uniform temperature and humidity inside the box, but also does not interfere with the weighing of the balance due to strong wind. Temperature uniformity ± 0.4 ℃ (i.e. 0.8 ℃), humidity uniformity ± 1.5% RH (i.e. 3.0% RH).

　　The U compressor unit and casing adopt an integrated transportation/separate operation structure, which is convenient for transportation and installation, and effectively avoids the influence of compressor vibration on the weighing balance, overcoming the problem of shock resistance and noise reduction. This instrument saves 1/3 of the floor space compared to the proportional type.

　　The u compressor adopts intermittent cooling mode, which saves 85% electricity compared to continuous cooling.

　　The heating and cooling systems are completely independent.

　　U comes standard with a pure water circulation water supply method for humidification.

　　U supply air circulation system: temperature resistant and low-noise air conditioning motor, multi blade axial flow fan.

　　There are two operation entrances on the U box, which are isolated with latex gloves to avoid the influence of manual operation on constant temperature and humidity conditions.

　　The overall equipment is protected against overheating, overload, and leakage, while the compressor is protected against overpressure and low voltage.

　　In case of sudden situations such as leakage, sound and light alarms will be triggered, and automatic shutdown will be provided after the alarm.

　　Different sample holders can be configured to weigh different samples.

　　Optional imported high-precision 1/100000 electronic balance, color touch screen, Chinese operating system, dual range, fully automatic calibration

　　Precautions when purchasing instruments:

　　Firstly, it is recommended to choose whether to purchase from the manufacturer or an agent.

　　Secondly, ensure that the instruments can meet the on-site testing needs and avoid purchasing unusable instruments, which may lead to a series of unnecessary troubles in the future.

　　Then, ensuring the quality of the instrument and after-sales service is closely related to the manufacturer, and it is recommended to find a trustworthy one.

　　Afterwards, ensure that the instrument can truly meet the requirements of production environment testing and pass safety testing to ensure that it truly meets the needs of safe production.

AfterSalesService :

• Constant temperature and humidity weighing system