air pressure sensor

Using Arduino Sensors
1

hi,my project requires to monitor pressure sensor from the range 0 -6.5kg/cm2 ..can anyone suggest pressure sensor for this range

2

How much kPa is that ? Is that 637 kPa ? That is 6 bar ? that is a lot.
Should it be an industrial sensor, or can it be a simple bare sensor ?
Does it have to accurate ?
Can you tell us what your project is ?

At mouser.com, they have a good search and selection, you can find almost anything.

3

its about 6.37 bar. its the pressure of compressor that is to be monitored by the arduino..if the pressure falls below 6.5 then arduino activates a relay

4

Well ? did you search at mouser.com ?
If I select 10 bar pressure sensors, a number of 5V analog HoneyWell sensors are in the results.

5

thanks for your suggestion.i went through mouser.com and found out a pressure sensor from kavlico PS312-7G-2 of range 0 to 7 bar .

In the datasheet the supply voltage for the sensor is 5v.

i thought of using the same power supply that is used to power my arduino that is 9v/1A, can use the
output from the 78M05 regulator as power to the sensor or can use a voltage divider which would be suitable.

6

How much current does it need?
Voltage divider, no, no matter what.
Parallel regulator with Arduino supply would be fine. Don't forget caps on the input & output per 78M05 datasheet.

7

the sensor requires 2.2mA current and 5v supply

8

You can power it from the 5V header then.

9

okay but i am going to use two air pressure sensors of same ratings to sense compressor pressure level of two different compressors so can i use the same supply from 5v header to power both

10

Yes.

Did you select that pressure sensor because it is close to 6 bar ? A pressure sensor that is made for 20 bar might be more accurate. The resulting accuracy depends on many things.
The Kavlico PS312 are expensive, more that 100 dollars, and I think that it is not possible to connect a tube to it.

11

anyone can help me, script code for water pressure 0 till by 2.5 MPa (Fluide Pressure Sensor 2.5 MPa).thanks

12

12bar US$12.29

Leo..

13

yes i chose the pressure sensor as it is close to 6 bar but is such a wide range of pressure sensor 0-20 bar is required for correct accuracy?or shall i medium range of 1 to 10 bar will be suitable?

14

i went through the 20 range of pressure sensors one problem i found in using it is they require 240 v power supply where as my power supply is limited to 72 v from battery