Odor monitoring device

The PEN3.5 odor monitoring device mainly consists of three functional components: a sampling operator, namely a gas flow control system, a gas sensor array, and a signal processing system. The principle is to simulate the perception, analysis, and judgment of odors by human olfactory organs.

1. Stability. For emerging detection technologies, good stability and practicality are the foundation of the instrument;

2. Compact, portable, efficient, and good repeatability are important for environmental monitoring, especially for field inspections;

3. Fast analysis time, with one cycle analysis time not exceeding one minute, thanks to the high temperature tolerance of PEN3 sensor up to 500 ° C, which can quickly remove molecules adsorbed on the sensor, and also help improve the service life of the sensor;

4. On site online sampling facilitates pollution source monitoring;

5. Normal analysis (normal sampling, air as background gas), which is the basis for establishing correlation with human smell;

6. It can be directly connected to a concentration and enrichment device and a gas chromatography-mass spectrometry (GC-MS) instrument, facilitating the development of instrument detection technology;

7. High degree of automation, automatic adjustment of detection range (automatic dilution of sample function), automatic calibration function, automatic concentration and enrichment function.

PEN3.5Odor monitoring deviceIt mainly consists of three functional components: a sampling operator, namely a gas flow control system, a gas sensor array, and a signal processing system. The principle is to simulate the perception, analysis, and judgment of odors by human olfactory organs. Collecting odor molecules through a controller and adsorbing them through a gas sensor array to generate a signal; The generated new number is sent to the signal processing subsystem for processing and processing; And the pattern recognition subsystem makes judgments on the results of signal processing. Normally, the gas collection flow control system and gas sensor array are considered as the hardware components of the PEN3.5 portable electronic nose odor detector, while the signal processing subsystem and pattern recognition subsystem are considered as the software components of the PEN3.5.

Electronic nose is a biomimetic instrument that simulates the human olfactory system. It responds to unknown samples through an array of gas sensors, uses clustering mathematical algorithms, and employs pattern recognition technology to detect and analyze the gases emitted from the samples for qualitative or semi quantitative analysis. It consists of a gas extraction control system, a gas sensor array, a software analysis system, and other components. Gas sensor technology has been applied in various applications of odor analysis, and it has significant advantages in monitoring air odor pollution. It has been widely and maturely used.

PEN3.5Odor monitoring deviceIt mainly consists of three functional components: a sampling operator, namely a gas flow control system, a gas sensor array, and a signal processing system. The principle is to simulate the perception, analysis, and judgment of odors by human olfactory organs. Collecting odor molecules through a controller and adsorbing them through a gas sensor array to generate a signal; The generated new number is sent to the signal processing subsystem for processing and processing; And ultimately, the pattern recognition subsystem makes judgments on the results of signal processing. Normally, the gas collection flow control system and gas sensor array are considered as PEN3.5Odor monitoring deviceThe hardware part, while the signal processing subsystem and pattern recognition subsystem are considered as the software parts of the PEN3.5 portable electronic nose odor detector.

Sampling operator: The gas flow control system is a technology developed based on years of experience in gas flow control, with the main components being an automatic sampling pump and a flow controller. It ensures stable airflow inside the electronic nose in various complex situations, enabling PEN3.5Odor monitoring deviceIt has achieved normal use in various complex situations such as laboratories, online control, and environmental monitoring, playing a role similar to a human nose.

Gas sensor array: German PEN3.5Odor monitoring deviceUsing ten different metal oxide sensors as the sensor array, this is PEN3.5Odor monitoring deviceThe core part of hardware.

Signal processing system: The Winmuster software developed includes popular algorithms such as K-NN (Euclidean distance, Mahalanobis distance), DFA discriminant function analysis, PCA principal component analysis, LDA linear discriminant analysis, PLS partial least squares, etc.

According to (reference) standards:

The detection is mainly based on the fingerprint template evaluation of the pollutant discharge standard data of GB/T14675-1993 "Determination of Odor in Air Quality - Three point Comparative Smell Bag Method", which is the third level standard of GB14554-1993 "Emission Standards for Odor Pollutants". Real time detection data is compared with national standard fingerprint templates to directly obtain dimensionless odor concentration (OU) values and response levels.

Application direction:

Environmental monitoring station, environmental protection bureau

Petrochemical plants, refineries

chemical industrial park

Livestock breeding farm

landfill

sewage treatment plant

Perfume manufacturing plant, food processing plant, drug processing plant, fertilizer plant and other chemical plants

Sampling operator: The gas flow control system is a technology developed based on AIRSENSE's years of experience in gas flow control. The main components are the automatic sampling pump and flow controller. It ensures stable airflow inside the electronic nose in various complex situations, enabling PEN3.5 to be used normally in various complex situations such as laboratories, online control, and environmental monitoring, similar to the sampling function of the human nose.

Gas sensor array: PEN3.5 uses ten different metal oxide sensors as the sensor array, which is the core part of the PEN3.5 hardware. AIRSENSE is one of the sensor manufacturers. After years of practical experience, it has been determined to use ten different metal oxide sensors as the sensor array effect.

Signal processing system: AIRSENSE developed Win muscle software with popular algorithms such as K-NN (Euclidean distance, Mahalanobis distance), DFA discriminant function analysis, PCA principal component analysis, LDA linear discriminant analysis, PLS partial least squares, etc.