Simple millivolt to 5V amplifier module

[Wester de Weerdt]

Hi, guys.

I have been developing gad detecting system with Arduino.

My O2 sensor is 4OXV CiTiceL Oxygen sensor.
http://www.ebay.com/itm/UK-CITY-4OX...0883143&pid=100034&rk=1&rkt=2&sd=181596912854

In theory in normal air which is 20.9% oxygen the mA coming out of the sensor should be around 0.10.

The 4OXV is basically a current generator. All you need to do is to put a load resistor across the 2 sensor pins, measure the volt drop across the resistor to determine the current flow. This current flow is proportional to oxygen concentration.
I put load 100 ohm resistor across the 2 sensor pins, the output voltage will be around 10mV.

So I need simple millivolt to 5V amplifier to read this value with Arduino.

Is there any built-in breakout board?

(I have found the Sparkfun OpAmp Breakout board - LMV358, but this circuit is AC coupled and is therefore not suitable for use with our sensors.)

Thanks.

 

[Bluejets]

What would output be for a 1K resistor?
Bit conflicting info as the spec says it outputs 9 to 13mV in air.
Do you need it to trip a circuit or more range as Arduino analog input will convert 0-5v into 0-1023.
Other than that a standard opamp should do it.

 

[Wester de Weerdt]

What would output be for a 1K resistor?
Bit conflicting info as the spec says it outputs 9 to 13mV in air.
Do you need it to trip a circuit or more range as Arduino analog input will convert 0-5v into 0-1023.
Other than that a standard opamp should do it.

Thanks for your quick reply.
I wonder if you could inform me about the standard opamp breakout board.
I am asking since I do not want to soldering at all.
Thanks again.
W.W.

 

[Bluejets]

This seems to be along the same lines ....http://electronics.stackexchange.com/questions/39303/scale-30-50mv-signal-to-0-5v-range

 

[Wester de Weerdt]

This seems to be along the same lines ....http://electronics.stackexchange.com/questions/39303/scale-30-50mv-signal-to-0-5v-range

Yeah.

I have read this forum twice before posting here.
But they did not mentioned about built-in breakout board.

Would you mind to tell me about breakout board which does not need to solder and just needs to wiring?
(I am in the prototype status and I need to check proof of concept of my product.)

Thanks.

W.W.

P.S.
I have found this:
http://www.analog.com/en/products/l...millivolt-and-voltage-input.html#Introduction

But it's price is amazing!!! ($98)

 

[Bluejets]

AD623.....instrument amp
module here ............. http://www.ebay.com/itm/DC-Millivol...3-AD620-Signal-Amplifier-Module-/252443031864

 

[Wester de Weerdt]

AD623.....instrument amp
module here ............. http://www.ebay.com/itm/DC-Millivol...3-AD620-Signal-Amplifier-Module-/252443031864

Thanks a lot!

 

[Alec_t]

..... or perhaps this?

 

[BobK]

Here is what you want to amplify and convert a current to a

voltage.

https://en.wikipedia.org/wiki/Transimpedance_amplifier

Bob