环境传感
SGP多像素气体传感器
全球最小的数字气体传感器SGP为室内空气质量的测量开启了新应用的可能性。SGP是第一个单一芯片上具有多个传感元件的金属氧化物气体传感器，可提供空气质量的详细信息。
这些传感元件具有无与伦比的抵抗实际应用中污染气体的能力，从而实现优异的长期稳定性和低漂移。小尺寸封装（2.45 x 2.45 x 0.9 mm3 DFN）、I2C接口，以及防水防尘保护膜使SGP易于集成到各种应用当中，例如家电和智能家居设备。
Overview of Sensirion's Gas Sensors
| Product | SGP30 | SGPC3 | SVM30 |
|---|---|---|---|
| Output |
|
|
|
| Supply voltage | 1.62-1.98 V | 1.62-1.98 V | 4.5-5.5 V |
| Package | 6-pin DFN 2.45 x 2.45 x 0.9 mm3 | 6-pin DFN 2.45 x 2.45 x 0.9 mm3 | PCB 39 x 15 x 6.5 mm3 |
| Interface | I2C 1.8 V | I2C 1.8 V | I2C 5 V |
| Indoor Air Quality | |||
| Typ accuracy | 15% of measured value | 15% of measured value | 15% of measured value |
| Output range1 | TVOC: 0 – 60'000 ppb CO2eq: 0 – 60'000 ppm | TVOC: 0 – 60'000 ppb | TVOC: 0 – 60'000 ppb CO2eq: 0 – 60'000 ppm |
| Sampling rate | 1s | 2s | 1s |
| Long-term stability | MOXSens® siloxane resistance: typ 1.3% accuracy drift per year in siloxane accelerated lifetime test | ||
| Baseline compensation | On-chip baseline compensation algorithm | ||
| Humidity compensation | Yes2 | No | Yes |
| Temperature | |||
| Measurement range | - | - | –20 °C – 85 °C |
| Typ accuracy | - | - | ± 1°C |
| Humidity | |||
| Measurement range | - | - | 0% – 100% RH |
| Typ accuracy | - | - | ± 5% RH |
Please note that the above values are of indicatory nature only. For detailed information please consult the respective datasheet.
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Long-Term Stability of Metal-Oxide Gas Sensors
Traditional metal-oxide gas sensors suffer from poor long-term stability caused through irreversible contamination by siloxanes.
Siloxanes are everywhere
- Indoor environments
- «Most abundant VOC emitted by humans»
- Consumer products
Siloxanes destroy metal-oxide sensors
- Significant loss of VOC sensitivity
- Strong increase of response time
Solution
Sensirion’s proprietary MOXSens® Technology provides the SGP with an
unmatched robustness against siloxanes, resulting in unique long-term
stabilityand accuracy.
Unique Performance Thanks to MOXSens® Technology
The sensing principle of the SGP is based on a heated film of metal-oxide (MOx) nanoparticles. Adsorbed oxygen on the metal-oxide particles reacts with the target gas and thereby releases electrons. This results in a change of the electrical resistance of the metal-oxide layer that is measured by the sensor.
The SGP multi-pixel gas sensor platform integrates four sensing elements − the pixels – into one small DFN package. Using Sensirion’s CMOSens® Technology, the SGP offers a complete sensor system on a single chip featuring a digital I2C interface, a temperature-controlled microhotplate, as well as preprocessed and calibrated indoor air quality signals.
Optimized metal-oxide sensing materials in combination with Sensirion’s multi-pixel gas measurement platform result in a unique resistance against contamination by siloxanes – MOXSens® Technology. Sensirion’s MOXSens® Technology enables highly sensitive and reliable gas measurements of indoor air pollutants such as volatile organic compounds and hydrogen.
环境传感
环境状况对我们的福祉、舒适和生产力有重大的影响。Sensirion的传感器解决方案可提供数据详尽的关键环境参数，如温度、湿度、挥发性有机化合物（VOC）、PM2.5和CO2。环境传感提升我们舒适度，提高各种智能设备的能源效率并开辟了新应用的可能性。
我们伴随您度过整个产品开发过程，从最初想法到产品推出及之后。我们的专业知识范围涵盖从原型构造、设计导入和用例开发，到大规模生产阶段的在线测试。
Indoor Air Quality and Volatile Organic Compounds
People spend 90% of their time indoors where concentrations of gaseous pollutants are significantly higher than outdoors. The widespread use of new products and building materials, as well as improved insulation for energy efficiency, has resulted in increased
concentrations of volatile organic compounds (VOCs). These VOCs originate mainly from paints and solvents, carpets and furniture, and cleaning agents, and are also emitted by humans. Elevated VOC levels can have a negative impact on well being, comfort, and cognitive abilities. Exposure to high levels of VOCs can be avoided or significantly reduced by regular ventilation, air purification and removal of strong VOC sources.
The Total VOC (TVOC) concept has been established as a practical time and cost-effective method of surveying indoor environments for contamination. Sensirion’s multi-pixel gas sensor SGP enables measurement of TVOC levels and thus helps to increase the efficiency of ventilation and air purification, and increases awareness of VOC sources and indoor air pollution.
