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Interpretation of household formaldehyde detector quality identification method-

Author:QINSUN Released in:2023-05 Click:152

 First, Look at the sensor
1. Household formaldehyde detectors generally use the electrochemical sensor method, which has been demonstrated by domestic and foreign authorities. First, \"hope\". Observe the sensor type through the detector air inlet. The electrochemical sensor is relatively large in size with a white diaphragm, while the semiconductor sensor is small in size and usually gray or black in color. 2. Second, \"feel and ask.\" You can consult the dealer for the type of sensor. If it\'s a semiconductor, you can pass it directly, and you can\'t measure formaldehyde even if you buy it.
3. Again, \"cut\". Looking at the price, the market price of a single imported electrochemical formaldehyde sensor is more than 200-300 yuan, and the manufacturer\'s wholesale purchase also costs more than 100 yuan, plus circuit boards, screenss displays, rechargeable batteries, cases, outer packaging, and production worker wages amount to 100 yuan. The direct cost of manufacturingrer More than 200 yuan, plus national taxes, operating expenses and reasonable profit, the final price is also more than 300 yuan. Therefore, it is almost impossible to buy electrochemical formaldehyde detectors from regular manufacturers for less than 300 yuan.

Second, look at the accuracy
National GBT18883-2002 \"Indoor Air Quality Standard\", the concentration of formaldehyde is two decimal places, that is, 0.01mg/m3, and the products of regular manufacturers are designed in strict accordance with national standards. If a trader announces that the accuracy is 0.001, it can in principle be determined that it is a counterfeit product from an informal manufacturer.

Third, look at the calibration
The faRegular manufacturers have complete R&D and production equipment, and test instruments should be calibrated in the calibration warehouse before leaving the factory to ensure product accuracy. Moreover, the electrochemical detector can be calibrated and evaluated once and frequent calibration is not necessary. The calibration cabin is an experimental cabin in a specific environment. Instrument calibration is performed in the calibration cabin. Building the calibration booth can easily cost hundreds of thousands or even millions of dollars. Generally, counterfeit companies will not spend this cost. If a formaldehyde detector requires the user to calibrate outdoors each time it is used, assuming the formaldehyde in the outdoor environment is 0, that is not rigorous, and it is also a common practice of counterfeit manufacturers.
4. Watch the weathers of the machine
Sleep time is a simple and effective way to determine whether a formaldehyde detector is an electrochemical sensor or a solid-state sensor. The working power of the electrochemical sensor is very small, and the main power consumption of the instrument comes from the circuit board. Semiconductor sensors work by generating heat and consume more than 10 times more power than electrochemical sensors. Usually, the standby time of a formaldehyde detector with an electrochemical sensor is more than 5 days, and the standby time of a counterfeit formaldehyde detector with a semiconductor sensor will not exceed 12 hours.
5. Look at the manufacturer\'s qualifications and product qualifications
First, check whether the manufacturer has a regular website, search for the manufacturer\'s name, and regular manufacturers can find the website. From the counderstanding of the company\'s relevant information, understanding of the company\'s team, production qualifications, the establishment of ISO product quality system, and the existence of images of office spaces, workshops and factory buildings. Secondly, log in to the website of the industrial and commercial office where the manufacturer is located, then find the authenticity of the company, its main activity, the year of establishment and if it has formal qualifications in R&D and production. In the case of OEM manufacturers, counterfeit manufacturers. again, log on to the Trademark Office website to check if it is a formal registered trademark. , it would be better if the product has a national patent, which means the accuracy of the instrument is more guaranteed. You can connect to the website of the National Intellectual Property Office for any request for information.ents.