Pressure Sensors from China for Industrial & IoT Use
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Pressure sensors sourced from China split mainly into MEMS piezoresistive and capacitive types, each with trade-offs in accuracy, temperature stability, and cost. Industrial and IoT applications hinge on the right specs — pressure range, output (analog, I2C, or 4–20mA), IP rating for wet environments, and accuracy class verified against IEC 61298. Chinese suppliers range from sensor-die packagers to full transmitter builders, and the sourcing risk is a sensor that meets its accuracy spec at 25°C but drifts badly across the operating temperature range.
A pressure sensor's usable accuracy depends as much on temperature compensation as on the raw element, so a headline accuracy figure means little without the operating range. The common pitfall is buying on best-case accuracy and missing the total error band over temperature, which IEC 61298 testing is designed to expose.
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FAQ
MEMS piezoresistive or capacitive — which should I source?
Piezoresistive MEMS sensors are cheaper and handle higher pressures with good linearity; capacitive types offer better stability and lower power at low pressures. Choose by your pressure range, power budget, and whether long-term drift or cost matters more.
What specs must I confirm with a Chinese pressure sensor supplier?
Pin down pressure range, output type, total error band over the full temperature range (not just at 25°C), and the IP rating for your environment. Ask for IEC 61298 accuracy data and test samples across temperature before committing to volume.
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