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How to use pressure sensor (Honeywell NBPMLNN060PGUNV)

Former Member

I have acquired a 0-60psi pressure sensor, namely the NBPMLNN060PGUNV (nr. 2146011 from Farnell).

According to the datasheet sensitivity of the device should typically be 21mV/V/Full range. Essentially I figured that I would be able to get a ~100mV output

difference from the device - if connected to a 5V supply - measured between pins 2 and 4 (21mV * 5V = 105mV).

But when I connect the sensor to the supply, the output voltage is only 4mV, and decreasing when I increase the pressure.

When output voltage reaches 0, nothing else happens even if I increase the pressure further. Needless to say, this behaviour seems a bit peculiar to me.

 

Can anyone verify if this behaviour is correct? Because sensing on a voltage of only 4mV or less is rather difficult in my application.

 

For testing purposes, if I up the supply voltage to 10V, the output voltage also doubles (~9mV). But it is still a very small voltage difference to work with.

Am I doing something wrong or do I need to add a differential amplifier circuit to get higher voltage differences?

 

Thank you for your time.


Regards,

David Larsen

AKJ Inventions ApS.

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  • 0

    Dear all,

     

     

    I am trying to get the pressure readings from the NBPDLNN030PAUNV. Could someone please let me know what logic/code should I use to obtain the pressure. Also, which pin to use to get the pressure readings I mean Vout- or Vout+ . I am using an arduino board and trying to take the pressure reading from both Vout- and Vout+ separately using the logic

     

     

    const float Null = 0.00; // Null VDC

      const float Sensitivity = 21.0;  // Sensitivity

      pressure = analogRead(ADC_HONEYWELL);

      pressureVDC = (float)pressure * 0.0048828125; // (5/1024 = 0.0048828125)

      pressureVDC = pressureVDC - Null;

      pressurePSI = pressureVDC / Sensitivity * 1000;

     

     

    None of the pin is giving me correct readings. Please let me know how should I write a code to obtain correct pressure readings. I have also searched on the internet but could not get any details about the code to get the pressure.Do I need to connect the Vout- and Vout+ pins some how and then take the pressure reading or do I need to include both Vout- and Vout+  in some logic to find the correct pressure readings.

     

     

    I am novice to sensors/automation/electronics. Could someone please suggest me a good blog/tutorial/book which I can follow to get started in this field.

     

     

    Waiting for your reply!!

     

     

    Regards,

    Himanshu

Reply
  • 0

    Dear all,

     

     

    I am trying to get the pressure readings from the NBPDLNN030PAUNV. Could someone please let me know what logic/code should I use to obtain the pressure. Also, which pin to use to get the pressure readings I mean Vout- or Vout+ . I am using an arduino board and trying to take the pressure reading from both Vout- and Vout+ separately using the logic

     

     

    const float Null = 0.00; // Null VDC

      const float Sensitivity = 21.0;  // Sensitivity

      pressure = analogRead(ADC_HONEYWELL);

      pressureVDC = (float)pressure * 0.0048828125; // (5/1024 = 0.0048828125)

      pressureVDC = pressureVDC - Null;

      pressurePSI = pressureVDC / Sensitivity * 1000;

     

     

    None of the pin is giving me correct readings. Please let me know how should I write a code to obtain correct pressure readings. I have also searched on the internet but could not get any details about the code to get the pressure.Do I need to connect the Vout- and Vout+ pins some how and then take the pressure reading or do I need to include both Vout- and Vout+  in some logic to find the correct pressure readings.

     

     

    I am novice to sensors/automation/electronics. Could someone please suggest me a good blog/tutorial/book which I can follow to get started in this field.

     

     

    Waiting for your reply!!

     

     

    Regards,

    Himanshu

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