load cell wheatstone bridge

It converts tiny resistance changes from the strain gauges into a measurable voltage. A full bridge uses four active gauges—two in tension and two in compression—so the output is roughly twice as sensitive as a half bridge, and it naturally rejects temperature-induced drift.

Measure the input and output resistance with a multimeter. A healthy load cell should match its datasheet specs, often around 350 ohms or 1000 ohms. A significant zero offset or open circuit usually indicates damage or moisture ingress.

Gauge resistance and metal body expansion both shift with temperature. Bridge wiring partly cancels this, but more precise sensors include compensation resistors or are calibrated across a specified temperature range. For long-term outdoor use, Kingmach builds sensors with temperature compensation and weather-sealed gauges to reduce drift.

Yes, but the output signal will be proportionally smaller, which might push it below your instrument’s noise floor. A 2 mV/V load cell excited with 5 V yields a 0–10 mV span; halving the excitation halves that span. Just make sure your signal conditioner can handle the lower signal level.

For projects that need non-standard ranges, mounting configurations, or cable lengths, the company works from existing strain gauge designs and adapts the housing, material, and sealing level. Engineering teams can also provide calibration data and wiring diagrams to simplify integration.