What is the usage of MEMS sensors in alcohol detectors?

Meaning Of MEMS sensor

MEMS sensors are of great significance in the application of alcohol detectors. Firstly, MEMS sensors are characterized by small size, low power consumption, high reliability, etc., which can meet the needs of portable applications. Secondly, MEMS sensors can realize the detection of tiny signals, so as to realize the accurate measurement of alcohol concentration. Finally, MEMS sensors have a wide range of application prospects, which can be applied to automotive, medical, military and other fields, thus promoting the development of related industries.

Enabling Accurate Breath Alcohol Detection

1. MEMS alcohol gas sensors can detect the alcohol concentration in exhaled gas with high sensitivity and selectivity, and are the core of realizing alcohol detection.

2. Enhancing testing efficiency. The compact integration of MEMS sensors allows for rapid testing while reducing cross-contamination.

3. Improve the testing experience. MEMS sensors eliminate the need for manual operation of alcohol testers and provide voice interaction to make testing simple and convenient.

4. Optimize Instrument Performance. MEMS inertial sensors improve instrument motion resistance and extend service life.

5. Enabling Connectivity. MEMS-based communication module setup allows uploading of test data for remote control and monitoring.

Alcohol Gas Sensor

1. Semiconductor gas sensors based on MEMS micro-nanofabrication technology can realize highly selective detection of alcohol concentration in exhaled gas. These MEMS alcohol sensors integrate a highly specific alcohol gas sensitive membrane layer on the chip. When the exhaled gas passes through, the alcohol molecules will have a specific adsorption reaction with the sensitive membrane. This causes changes in the electrical properties of the sensitive membrane, such as capacitance and conductivity. 

2. Such changes can be converted into corresponding electrical signals and amplified by the chip, and the breath alcohol concentration can be accurately detected according to the changes in electrical parameters. This kind of MEMS-based alcohol gas sensor has the advantages of extremely small size, low power consumption and high sensitivity.

Airflow Sensor

1. MEMS airflow sensors can measure the direction of flow and flow information of exhaled gas from the human body when using an alcohol detector. Knowing the size of the airflow can determine whether the exhaled breath reaches the sensor adequately. The direction of the airflow can determine whether the user is exhaling directly into the mouth of the sensor. 

3. This is very important to get accurate alcohol concentration detection.MEMS airflow sensors usually work on the principle of thermal, through micro-nano-processing on the chip to create a fine thermocouple or thermistor. When the airflow passes by, it will take away the heat and calculate the airflow rate by detecting the temperature difference.MEMS airflow sensors are small in size and fast in response, and can be cost-effectively integrated into alcohol detectors.

Temperature Sensor

1. Alcohol detector integrated MEMS temperature sensor, can be real-time monitoring of the temperature of the exhaled gas into the sensor. Alcohol gas sensors, airflow sensors have the best operating temperature range, only in the temperature range to ensure that the sensor parameters are stable and accurate detection. If the temperature of the exhaled gas is too high or too low, it will directly affect the performance of the sensor. 

2. Therefore, the temperature sensor to maintain the normal operation of the alcohol detector is of great significance. The MEMS Pt RTD temperature detector made by fused-silicon process has the advantages of small size and fast response, which is the best choice for the temperature compensation of alcohol detector.