Detection sensor for formaldehyde with different concentrations

Abstract

The invention discloses a detection sensor for formaldehyde with different concentrations. The detection sensor includes a sliding block, the sliding block is internally provided with a sliding cavitypenetrating up and down, the sliding cavity is internally provided with a sliding rod in frictional contact with the left and right end walls of the sliding cavity, and a scale is fixed to the frontend surface of the sliding rod. According to the detection sensor for the formaldehyde with the different concentrations, the current indoor formaldehyde concentration is detected by using a visual fluorescent agent, if the formaldehyde with the current concentration exceeds the standard, an air lock can drop, and the response effect is obvious; meanwhile, disassembling is convenient, compared with the fact that the formaldehyde concentrations is measured by conventional expensive gas detection sensors, the cost is low, the price is more affordable, and the range of application is wide; and inaddition, whenever a tested glass block is removed, the device automatically slides upwards to the next concentration for detection, variable control of the concentration is accurate, measurement ismore accurate, no manual concentration adjustment is required, and operation is easy and clear.

Description

technical field [0001] The invention relates to the field of formaldehyde detection, in particular to a sensor for detecting formaldehyde concentrations at different heights. Background technique [0002] As we all know, in the process of building decoration, decorative materials that emit formaldehyde are often used, and formaldehyde has a strong stimulating effect on human skin, causing skin eczema, systemic allergies, etc. Currently, the World Health Organization has identified formaldehyde as a class I carcinogen Substance; Since formaldehyde is colorless, formaldehyde in the air needs to be detected with the help of equipment. The traditional detection method is to pump air at different heights into test tubes in batches through an air pump, and then send the test tubes to the detection mechanism at the same time for detection. The pumping process is cumbersome, the inspection period is long, and it consumes a lot of manpower and material resources; most of the formalde...

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Problems solved by technology

[0002] As we all know, in the process of building decoration, decorative materials that emit formaldehyde are often used, and formaldehyde has a strong stimulating effect on human skin, causing skin eczema, systemic allergies, etc. Currently, the World Health Organization has identified formaldehyde as a class I carcinogen Substance; Since formaldehyde is colorless, formaldehyde in the air needs to be detected with the help of equipment. The traditional detection method is to pump air at different heights into test tubes in batches through an air pump, and then send the test tubes to the detection mechanism at the same time for detection. The pumping process is cumbersome, the inspection period is long, and it consumes a lot of manpower and material resources; most of the formaldehyde sensors that can detect the concentration of formaldehyde on the spot use expensive gas-sensitive materials and sophisticated manufacturing processes, and there are various types of sensors based on sonic gas and molecular screening. Expensive devices for adsorption, the detection cost of this type of formaldehyde sensor is high, and the applicable scene is relatively small; therefore, it is necessary to design a formaldehyde concentration detection sensor with different heights to solve the above problems

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