Formaldehyde tester

A formaldehyde tester and gas circuit technology, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of non-quantifiable results, low test accuracy, and inability to be widely used, and achieve accurate and reliable test results.

Inactive Publication Date: 2016-05-25
SUZHOU NANOGRID TECH
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Problems solved by technology

[0003] At present, the most accurate method for measuring formaldehyde gas is chromatography, but this method requires the help of large precision instruments, which is expensive and cannot be widely used
There is also a color method using chemical reagents to detect the concentration of formaldehyde, but this method requires the use of chemical reagents for detection. The concentration of formaldehyde can be judged by the color change of the reagent after absor

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with various embodiments shown in the accompanying drawings, and the following is a preferred embodiment of the present invention.

[0024] See Figure 1 to Figure 2 As shown, the present invention relates to a formaldehyde tester 100, including a sensor 10, a gas path gas chamber unit 20, a signal acquisition and processing unit, a power supply unit, a storage unit, a display unit, an alarm unit, a wireless communication unit and a microprocessor unit, The signal acquisition and processing unit, power supply unit, storage unit, display unit, alarm unit, and wireless communication unit are electrically connected to the microprocessor unit.

[0025] The sensor 10 is a new type of resistive nanomaterial formaldehyde sensor, which can realize the response of ppb level formaldehyde concentration and has high sensitivity. The sensor 10 also has the advantage of low power consumption. Specifically, it uses...

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Abstract

The invention provides a formaldehyde tester. The formaldehyde tester comprises a sensor, a gas channel and gas chamber unit, a signal acquisition and processing unit and a microprocessor unit, wherein the gas channel and gas chamber unit comprises a sensor cavity for accommodating the sensor, a test gas channel connected with one side of the sensor cavity, a calibration gas channel connected in parallel in the same side of the sensor cavity with the test gas channel as well as an exhaust device arranged on the other side of the sensor cavity, one end of the test gas channel is connected with outside to-be-tested gas, and the other end is connected with the sensor cavity; the signal acquisition and processing unit is electrically connected with the microprocessor unit and the sensor; the exhaust device is electrically connected with the microprocessor unit. The formaldehyde tester can calibrate calibration of the sensor and prevent the sensor from affecting test accuracy due to own drifting, so that a test result is accurate and reliable.

Description

technical field [0001] The invention relates to a formaldehyde tester, which belongs to the field of gas detection. Background technique [0002] Formaldehyde is a harmful gas that can induce various diseases and is carcinogenic. Formaldehyde gas in the home and office environment has become an important cause of harm to human health, and has aroused people's high attention. According to my country's national standards: the maximum allowable concentration of formaldehyde in the room air is 0.08 mg / m3, and the maximum allowable concentration of formaldehyde in public places is 0.10 mg / m3. [0003] At present, the most accurate method for measuring formaldehyde gas is chromatography, but this method requires the help of large precision instruments, which is expensive and cannot be widely used. There is also a color method using chemical reagents to detect the concentration of formaldehyde, but this method requires the use of chemical reagents for detection. The concentration...

Claims

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Application Information

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IPC IPC(8): G01N33/00G08C17/02
CPCG01N33/0036G08C17/02
Inventor 刘福星张克栋顾唯兵崔铮
Owner SUZHOU NANOGRID TECH
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