Hi,
I bought a pressure sensor for a test but I don't know how to read the value.
I have for pins, one ground, one + and two pins of excitations. How I can connect the sensor to an Arduino Mega ?
The datasheet : here
Thanks in advance for your time,
... Alex
Name, designation?
Hi,
Can you please tell us your electronics, programming, arduino, hardware experience?
What you have is a pressure sensor with a bridge, load cell, type output.
You will need something like a HX711 module to power it and amplify the output signal.
Google
hx711 arduino pressure sensor
There are tutorials to help you understand what you have.
Which model do you have?
What range is it?
Thanks.. Tom... 
Hi,
I bought a PREPS-N-025. I don't know its range, but it's better than 3 psi (it's sufficient for me).
What you have is a pressure sensor with a bridge, load cell, type output
So I can't use the sensor with an Arduino ? I can't have a HX711, I need an industrial pressure sensor which can be placed in a pipe. And which can accept javel or other destructive liquid.
Alex
I wrote a driver/library for a TE Connectivity industrial pressure sensor for an Atmega328P (same MCU in an Arduino UNO)
These sensors are really easy to interface with. Should be a cake walk to make it work with an Arduino Mega. But these are not cheap. I got mine for almost $50.
Hi,
WHY?
Do you know how your pressure sensor works?
Can you please tell us your electronics, programming, arduino, hardware experience?
If you do not know the full spec of the sensor, you really need to find out!!
Please explain you full application?
Tom...
From the datasheet information below:
You should power it (exc+ and exc-) with about 5V
the output difference voltage between the two signal wires will be:
0.2584mV/ psi / volt if the volt = 5 then
1.292 mv / psi.
I expect the signal "output-" is about 2.5 volts so you will need some sort of difference amplifier.
You should really consider an HX711 (as suggested above)
You should also google wheatstone bridge measurements to get a better understanding of your pressure sensor.
BTW 1.291 mv/ psi = 0.001291 volts / psi. So small it is likely not readable with some low cost multimeter.
Then there is noise......
Input/Output impedence 270 Ohms to 400 Ohms
Excitation voltage 2.5 to 10 volts DC (for best long term stability, use a lower excitation voltage)
Sensor Output 0.2584 mV/psi/Volt
Connector Custom molded 4 pin connector; signal +/- and excitation +/-
Hi,
I work for a biotechnical process and we need 2 pressures sensors. Our system has 2 lines of pipe, one for the water where I use this sensor. (it's not perfect but for the moment it works).
The second line is more complex. We have a pipe full of bacteria which are sent to a tank by a peristaltic pump. That's why I choose the sensor that I describe at the top of this discussion. it is in contact with the liquid but can be sterilized. It supports bleach solution for example.
So yeah I don't understand how I can put an HX711 in this part of my process.
I'm a junior engineer who works as an automatist. I can program and, with the time, I'm not a nooby with Arduino but not a serial killer as you ^^.
Most of my sensors use I2C or analogue pin. But it's the first time where I used a sensor with 2 excitation wires.
With the limited information we have it appears you sensor output 4 wires in a bridge configuration.
I envision you sensor connecting to an HX711 board which in turn connects to the arduino.
This topic was automatically closed 120 days after the last reply. New replies are no longer allowed.