strain gauge pressure sensor

Strain gauge sensors typically handle higher overpressure and offer better long-term stability because the foil gauge and metal diaphragm are robust. MEMS chips are smaller and cheaper but can drift faster when exposed to temperature swings or vibration. We use strain gauge technology for most geotechnical installations because the sensor stays in place for years, often without recalibration access.

Yes, our standard strain gauge pressure sensors use welded stainless steel construction and double-sealed cable entries rated for IP68 conditions. For cable submersion, we recommend specifying polyurethane-jacketed cable and a molded boot to prevent wicking. In brackish or acidic groundwater, we can switch to Hastelloy diaphragms to avoid pitting.

It depends on your data logger and noise environment. mV/V signals need a logger with precise ratiometric inputs and are fine for short cable runs. 4–20 mA loops reject noise better over long distances and allow direct connection to PLCs. We can advise on compatibility—send us your logger model and we’ll confirm the best fit.

Many custom pressure configurations ship within two to three weeks because we keep raw diaphragms and gauge patterns in stock. More exotic combinations like low-pressure 50 kPa cells with HART output may take a few extra days. We don’t charge engineering fees for standard custom work like modified cable lengths or connector swaps.

Strain gauge sensors are mainly suited for static and quasi-static measurements; if you need to capture rapid pressure spikes like blast or hammer effects, a piezoelectric sensor is more appropriate. We can help identify the crossover point based on your required frequency response and will be upfront if the technology isn’t the right match.