Description
The GM-302C is a cutting-edge MEMS (Micro-Electro-Mechanical Systems) alcohol gas sensor designed for high-sensitivity ethanol vapor detection. Using MEMS processing, it constructs a micro-heating plate on a silicon substrate, combined with metal oxide semiconductor gas-sensitive materials that exhibit low conductivity in clean air. When exposed to ethanol, the sensor’s conductivity increases proportionally to the gas concentration, allowing simple circuit conversion of conductivity changes into output signals corresponding to ethanol levels.
Application
It is suitable for the ethanol vapor in the application and testing places of consumer electronic products such as mobile phones and computers; it is also suitable for the supervision of motor vehicle drivers and other risk workers after drinking.
Features
This product adopts MEMS technology, with solid structure and good shock resistance; it has the advantages of small size, low power consumption, high sensitivity, fast response recovery, simple driving circuit, good stability and long life.
Specifications
| Parameter | Details |
|---|---|
| Model | GM-302C |
| Type | MEMS Alcohol Gas Sensor |
| Packaging | Ceramic |
| Detected Gas | Ethanol Vapor |
| Detection Range | 1ppm – 500ppm |
| Circuit Conditions | - Supply Voltage (Vc): ≤24V DC - Heating Voltage (VH): 3.3V±0.1V (AC/DC) |
| Heating Resistance (RH) | 85Ω±5Ω (at room temperature) |
| Heating Power (PH) | ≤62mW |
| Sensitive Resistance | 1KΩ–30KΩ (in 50ppm ethanol) |
| Sensitivity (S) | Rs(air)/Rs(50ppm ethanol) ≥3.0 |
| Concentration Slope (α) | ≤0.6 (R300ppm/R50ppm ethanol) |
| Test Conditions | - Temperature/Humidity: 20℃±2℃, 55%RH±5% - Preheating Time: ≥48 hours |
* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.
Technical Support:
Customized technical design and function, LOGO and package are available without extra charge (including molding fee) for mass volume.
The sensors don't have sleeping mode. It can be set in program if needed.
All Winsen products go through strict inspections and tests to make sure they are 100% qualified before shipping out.
The sensor has been fully tested (not calibrated) before leaving the factory, but the module will be calibrated before leaving the factory.
However, after transportation and storage, the environment conditions change, and the surface of the sensor absorbs moisture, mixed gas, pollution matters, etc. It is recommended that customers perform aging and calibration after sensors become stable according to the program and use occasions of the whole device.
15﹪-90﹪RH without condensation,greater or less than this range or long-term high temperature and high humidity will affect the life of the sensor.
Our sensors are certified with CE, 3C, ROHS, anti-explosion, fire prevention, and coal mining safety according to different applications. And we provide assistance for new certification.
Many factors can cause the sensor to fail such as broken wires in transportation, poisoning, falling off of the sensitive material, damage to the heating wire (device), etc. Please find specific cause in each category with Winsen’s aftersales.
Winsen provides professional consultation and service before and after sales. We will recommend the best fitting sensor for your demand. If you have any problem, don’t hesitate to email us to sales@winsensor.com
Due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. But we will reply to your inquiry in 24 business hours.
