Solutions Overview
Technical Q&A (FAQ)
The answer to this one can get pretty deep, and we suggest talking to an advanced sensor engineer about your specific needs.
Whether you're looking for a sensor to measure temperature, gasses, pressure, humidity, or any other metric, in general making this decision comes down to a few key factors:
- The application itself;
- The environment the sensor will operate in;
- The temperature range the sensor is expected to measure within;
- The level of reading accuracy needed;
- How quickly it needs to take readings;
- The kind of packaging/housing the sensor needs;
- Its circuit design;
- Output type -- analog or digital.
2. Where are pressure sensors used?
Pressure sensors are in a wide range of industries from ranging from medical, automotive and HVAC to geotechnical, meteorology and all manner of industrial process measurement and control applications.
3. How to choose a pressure sensor?
The following application requirements are important to consider when choosing a pressure sensor:
1) Pressure media & temperature
2) Operating environment
3) Pressure range to be measured
4) Accuracy level
5) Electrical output signal
6) Process connection type
7) Electrical connection type
4. Which is more accurate, an analogue or digital pressure sensor?
Both analogue and digital pressure sensors can be accurate, but the accuracy of each type of sensor depends on various factors.
Analogue pressure sensors provide continuous output signals that vary proportionally with the applied pressure. Analogue sensors have a fast response time and are easy to set up. They typically have a lower resolution and accuracy compared to digital sensors. The accuracy of an analogue sensor can also be affected more readily by external factors such as temperature changes, noise, and signal drift over time.
Digital pressure sensors generally have low power consumption, offer better diagnostic data and can even offer multiple output signals in some cases. They offer higher resolution and accuracy, which makes them more suitable for applications that require highly precise pressure measurements. Digital sensors are also less affected by external factors and feature integral monitoring and compensation to improve their accuracy.
Generally, digital pressure sensors offer higher accuracy and precision compared to analogue sensors, but the choice of which to use ultimately depends on the specific requirements of your application.
5.What is the difference between AMR sensor and hall element?
Please check the table below.
| AMR | Hall | |
| Material | Ferromagnetic thin film metal | Semiconductor |
| Operating principle | Magnetoresistive effect | Hall effect |
| Magnetic sensing direction | Horizontal (parallel) magnetic field change with relative to the sensor film | Magnetic field change perpendicular to the element chip |
| N/S discrimination | Not possible alone | Possible |
| Input resistance | Several tens of Ω to several tens of kΩ (Depends on chip size. Customizable) | Several 100 Ω to 1 kΩ |
| Output voltage | Saturates around 4kA/m | Almost linear output |
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