Understanding the readings from MicroPressure sensor

Sensors Force & Weight
1

Hello guys,

I use MicroPressure sensor to ensure that I won’t overload a soft gripper in my setup. The sensor is connected to the pipe using T-shape connector just before the soft gripper.

When pump is not working - the reading on MicroPressure sensor give me about 1 atmospheric pressure:

16:18:40.669 > 0.980524 bar

16:18:40.685 > 14.2219 PSI

When I start a pump - the readings go up:

16:22:43.318 > === PRESSURE ===

16:22:46.362 > 1.611193 bar

16:22:46.378 > 22.9192 PSI

16:22:46.391 >

My understanding that the pressure applied inside the tube to the gripper is 1.6 - 0.98 bar, which is 0.62 bar? Or is it 1.6 bar? The soft gripper limit is 1.2 bar, so getting correct reading is important to me here.

Thanks,

Alex

2

That is an absolute pressure sensor, so the pressure inside the tube is 1.6 bar, as reported.

Perhaps you are confused the two common measures of air pressure: relative and absolute.

Relative is (internal absolute pressure) - (external absolute atmospheric pressure). In a “gage” or “gauge” (relative) pressure sensor, the difference is taken automatically by a membrane connected to two different pressure inputs.

3

Thank you! This makes sense.