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How to use load cell

I have 5V load cell as below;

Voltage Compression Load Cell 4.5 → 45.4kg, 5V

I want to measure the compression force of a manual printing press, but I'm not sure how to 'connect' the load cell and get the readings.

Any help would be gratefully recieved. 

Thanks!

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Comments

September 24, 2018 09:30

The types I have used have used strain gauges in a Wheatstone bridge configuration. They produce a relatively low signal output in the presence of a common mode voltage from the bridge excitation voltage, so you will need a suitable amplifier known as an instrumentation amplifier. Looking at the RS site there is a precision built PCB using Microchip components https://uk.rs-online.com/web/p/analogue-development-kits/7496451/
If you prefer to design your own, search "instrumentation amplifier" and there will be many hits, but then you need to start the selection task...
Something like the INA122 may be suitable https://uk.rs-online.com/web/p/instrumentation-amplifiers/2858249/ I have used these in other projects using strain gauges.
I also found this example using the INA122 applied to a strain gauge http://www.tciaffairs.net/circuit-diagram-of-load-cell/circuits-strain-gage-load-cell-for-thrust-measurement-l47830-inside-circuit-diagram-of-load-cell/
Hope this helps to get you started.

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