Senquip monitoring water tank

Sensor Calibration

Your level sensor might be measuring the weather. We recently tested a level sensor where the actual water level wasn’t changing – the measured level was. Overnight it moved 15 mm peak-to-peak, closely following temperature. Analysis showed a temperature dependence of approximately +1.17 mm/°C. And this was indoors, with only a 5.5°C temperature swing. Rather …

Sensor linearisation

Scripting to Linearise Measurements

Measurements are easy. Useful data is harder. Most sensors will happily give you a number. But that number isn’t always meaningful on its own. Many industrial sensors are inherently non-linear. A resistive temperature sensor, for example, changes exponentially with temperature. And even when a sensor is linear, the system it’s measuring often isn’t. Take tank …