hello everyone,

I am using this pressure sensor provides a liner relationship between the current and the pressure so Min 4mA = 0bar and Max 20mA = 6 bar,
so what kind of formula should I use to get the reading of the pressure from an analog input that reads voltage ?

 

What kind of uPC are you using ?

 

hi kh,
One option is to use say a 250R load resistor through which the sensed current passes, this would give 1V for 4mA and 5V for 20mA.
E

 

Check this out

 

hi kh,
One option is to use say a 250R load resistor through which the sensed current passes, this would give 1V for 4mA and 5V for 20mA.
E

thanks , but then how the formula will look like to get the pressure reading in the end

 

Check this out

https://www.burkert.com/en/type/8323 i use this sensor so what kind of formula should i use ?

 

hi,
The next step would be to use a PIC/MCU with an inbuilt ADC.
The program would calculate the actual pressure and display either on an LCD display or and RS232/USB output.
E

 

hi,
The next step would be to use a PIC/MCU with an inbuilt ADC.
The program would calculate the actual pressure and display either on an LCD display or and RS232/USB output.
E

thanks, but then how to use it with this type of sensor https://www.burkert.com/en/type/8323

 

I do not see a 6bar sensor on that datasheet, only 5bar or 10bar.??

 

hi,
This is an image of a 4-20mA circuit.
Are you able to build this circuit.?

 

hi kh,
One option is to use say a 250R load resistor through which the sensed current passes, this would give 1V for 4mA and 5V for 20mA.
E

and with how much should i supply the sensor ?

 

and with how much should i supply the sensor ?

The Data for the sensor says 10v to 30v.
I would choose 12V.
E
This OPA would be suitable.

 

I do not see a 6bar sensor on that datasheet, only 5bar or 10bar.??

it says in the sensor on the picture

and this is the data sheet of it

https://www.burkert.com/en/Media/pl...-EU-ML.pdf?id=MAN0000000000000001000110854ML-

 

I have read the English version of that datasheet, I cannot see 6 bar in the text.??
E

OK, Got it!!!
Its on the body of the sensor in the picture

 

Do you have any programming experience of PIC controllers.?

 

Do you have any programming experience of PIC controllers.?

No not really , is there a way to read it using a sensor only , then maybe its easier right ?

 

You can read the voltage and mark a chart.

 

Two options would be:
Use a 0mA to 20mA Ammeter, connect the meter in series with the sensor current
Build the circuit and use a 0V to 5V, voltmeter on the output pin.

 

This thread is getting long and I still lack overview of what the measurement / signal will be used for?

Because if it is remote viewing, then a standard adjustable LED or LCD panel instrument might be the solution?

 

Two options would be:
Use a 0mA to 20mA Ammeter, connect the meter in series with the sensor current
Build the circuit and use a 0V to 5V, voltmeter on the output pin.

well we used a resistor 250 ohm and we supplied the sensor with 12v and then got a reading of 0.985 . so i guess this is the reading of the pressure when 1v=4mA =0 bar . but then should't be reading the atmospheric pressure because it can not really be 0 bar ?