Which amplifier should I use?

[fabiogiga]

I have a load cell with a capacity of 5kg and a sensitivity of 2 mV / V. It has capacity for 5000 divisions (so it has a resolution of 5/5000 = 1g). I would like you to help me find the best amplifier for this application. I have a USB 6009 DAQ too.

please help me!
Appreciate

[lferreira]

Hi,

You must choose an amplifier that the gain is enough to amplifying load cell signals in order to fit in your DAQ device input range. However to get samples from strain gage sensors is important to implement besides the amplifiers a wheatstone bridge to acquire accurately since USB-6009 doesn't have internal signal conditioning for straing gages.

I recomend you see the following tutorials:

Measuring Strain with Strain Gages

https://www.ni.com/en/shop/data-acquisition/sensor-fundamentals/measuring-strain-with-strain-gages.h...

Load, Pressure, and Torque Measurements

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000000x1jjCAA&l=en-US

Field Wiring and Noise Considerations for Analog Signals

https://www.ni.com/en/shop/data-acquisition/measurement-fundamentals/field-wiring-and-noise-consider...

Regards,

[fabiogiga]

thank you so much!
Can you tell me how much gain I need in this case?
What is the name of the amplifier that you would use in this case?
What is the name of the signal conditioner you would use?

I'm a mechanical engineer, so I'm new to the electronics world!