How to choose a high quality formaldehyde detector? The application of the leveling instrument P>formaldehyde detector can be said to be more and more, then there will inevitably be high and inferior quality. Today, we should introduce how to choose high quality formaldehyde detector from the reverse side and share how to identify the formaldehyde in the cottage. Detector:
First, look at the sensor. Household formaldehyde detectors usually use electrochemical sensor method, which is proved by domestic and foreign authorities.
First of all, hope. The type of sensor is observed through the air inlet of the detector. The electrochemical sensor is relatively large in volume and has a white diaphragm. The semiconductor sensor is small in size and generally has a gray or black color.
Second, smell, ask. You can consult the sensor type of the business, such as semiconductor, direct PASS, bought and can not measure formaldehyde.
Again, cut. Look at the price, the price of a single imported electrochemical formaldehyde sensor is more than two hundred and three hundred yuan, and the manufacturer's bulk purchase is also more than 100 yuan, plus the circuit board, display screen, rechargeable battery, outer casing, outer packaging, and the total wage of the production workers is 100 yuan. 200 yuan, plus national tax, operating roughness meter camp costs, reasonable profits, the terminal price is also at least 300 yuan. Therefore, the roughness meter is less than 300 yuan and almost no electrochemical formaldehyde detector of the regular manufacturer can be purchased.
Second, look at the accuracy.
National Standard GB\T18883-2002 "Indoor Air Quality Standard", the formaldehyde concentration is accurate to two decimal places, that is, accurate to 0.01mg/m3, and the regular manufacturer products are designed in strict accordance with national standards. If there is a business promotion accuracy of 0.001, it can be basically determined as a cottage product of an informal manufacturer.
Third, look at the calibration.
Regular manufacturers have complete R&D and production equipment. The test instruments must be calibrated in the calibration warehouse before leaving the factory to ensure the accuracy of the products. And the electrochemical detector can complete a calibration without frequent calibration. The calibration warehouse is a laboratory cabin in a specific environment. The calibration of the instrument is completed in the calibration warehouse. The construction of the calibration warehouse is hundreds of thousands or even millions. Generally, the cottage enterprises will not spend this cost. If a formaldehyde detector requires the user to calibrate outdoors every time, it is assumed that the formaldehyde in the outdoor environment is 0. This is not rigorous, and it is also a common practice of the cottage manufacturers.
Fourth, look at the standby time.
Standby time is the easiest and most effective way to determine whether a formaldehyde detector is an electrochemical sensor or a semiconductor sensor. The electrochemical sensor's working power is very small, and the main power consumption of the instrument comes from the circuit board. The semiconductor sensor works by heating, and the power consumption is more than 10 times that of the electrochemical sensor. Usually, an electrochemical sensor's formaldehyde detector has a standby time of more than 5 days in the bending tester, and the standby time of the semiconductor sensor's cottage formaldehyde detector does not exceed 12 hours.
Fifth, look at the qualifications of the manufacturers and product qualifications.
First look at whether the manufacturer has a regular website, search for the manufacturer name, regular manufacturers can find the official website. From ** to understand the relevant information of the company, to understand the enterprise team, production qualification, whether to establish an ISO product quality system, there are no pictures of office space, workshops, factory buildings. Secondly, log in to the website of the industrial and commercial bureau where the manufacturer is located to further find out the authenticity of the enterprise, the main business, the establishment period, and whether there is formal R&D and production qualification. In order to prevent OEM manufacturers, cottage manufacturers. Again, log on to the Trademark Office website to see if it is a regular registered trademark. Finally, if the product has a national patent, it is better, indicating that the accuracy of the instrument is more secure. This can be found on the website of the State Intellectual Property Office.
For more information about the formaldehyde detector, it is recommended to browse: http://
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