Hey guys

i need an a agent help, what can i use to power my sensor it is a pressure sensor and how will i know that it is reading

 

What sensor?

 

Hey guys

i need an a agent help, what can i use to power my sensor it is a pressure sensor and how will i know that it is reading

i did mension.

 

Hello,

Do you have a datasheet of the sensor?
A link to the datasheet will also help.

Bertus

 

I ws trying to figure out how to attach but i cant so the sensor im refering to is AWM5000 series u can google it.

 

Hello,

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Hello,

Do you mean this sensor?
http://sensing.honeywell.com/index.php?ci_id=3108&la_id=1&pr_id=25884
Bertus

 

thanks. yes thats the sensor im talking about.

 

The sensor you refer to is A Mass Air Flow sensor , not a pressure sensor

 

Rather difficult to get a clear answer from the spec sheets but I think I've got it nailed down to:
Pin 1 = power = 8 to 15 Vdc
Pin 2 = ground
Pin 3 = no connection
Pin 4 = output voltage.
The output will be 1 to 5 volts in linear relationship to mass flow of zero to 20 standard liters per minute.

 

Rather difficult to get a clear answer from the spec sheets but I think I've got it nailed down to:
Pin 1 = power = 8 to 15 Vdc
Pin 2 = ground
Pin 3 = no connection
Pin 4 = output voltage.
The output will be 1 to 5 volts in linear relationship to mass flow of zero to 20 standard liters per minute.

Im stil not getting something right, i want to use Led as my output but i do not get any results, is"t because my connection is wronrg or my sensor os not working. i connected pin 1 tothe supply of 15v then pin 2 to the negative of my led which goes to the negative off the supply and the last pin 4 to the positive of my led. please help

 

Hello,

As the output of the sensor varies with the flow through the sensor, you can not connect a led directly.
If you want to connect ONE led, you will need a comparator circuit that can show if the output voltage has gone over a certain level.
If you want more leds (that can show the amount of flow) you will need a circuit with a LM3914, that can show 10 levels linear.

I have attached the datasheet of the LM3914.

Bertus

PS I did not have a reaction on the last PM I send you.

 

please people come to my rescure on this one.

 

Hello,

If you use a comparator circuit, you can set a value of flow with the potentiometer in this circuit:

The potentiometer can have a value of 10K , the given resistor can be from 100K to 1M Ohms.

This is the full page where the circuit comes from:
Positive feedback

Bertus

 

This is brilliant, exactly what i needed. Thank you in million times.

 

OK! Im stuck again i do not get any flow reading, actually what i wanted to do is to use the LED to show my flow.

 

Hello,

As in the post from #12:

Rather difficult to get a clear answer from the spec sheets but I think I've got it nailed down to:
Pin 1 = power = 8 to 15 Vdc
Pin 2 = ground
Pin 3 = no connection
Pin 4 = output voltage.
The output will be 1 to 5 volts in linear relationship to mass flow of zero to 20 standard liters per minute.

Can you measure the output voltage with a MultiMeter between pin 4 and 2 of the sensor, with and without flow?
(4 is the red and 2 is the black probe from the meter).

Bertus

 

Hey!

thanx i got it.