Melt pressure transducer
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Wonder if it is possible to connect a melt pressure transducer to Duet 3HC. Want to add a melt pump to my pellet extruder, using a pressure transducer either side of the pump would be very useful to regulate flow.
Any help would be appreciated. -
@Hoops40 do you have some examples of the potential transducers? we support a linear-analog sensor so it may be possible to use that concept with a pressure transducer depending on the sensor's electrical interface.
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@T3P3Tony apologies for the delay, sensor is a PT131 pressure transducer.
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@Hoops40 said in Melt pressure transducer:
PT131 pressure transducer
do you have a data sheet for the specific one? from a quick internet search you can get ones with a 0-5V output which, with a voltage divider or other interface circuit might work as a linear analog input to the Duet. That said i note they also have temperature sensor inbuilt so i expect they need temperature compensation and even when temperature compensated not sure how linear they would be.
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@T3P3Tony thank you this is what is from the description on the website.
Main technical parameters of PT131 melt pressure sensor;
- Range: 0-200 MPa
- Accuracy: 0.2FS
- Output signal: 2mV/V; 3.33mV/V
- Power supply voltage: 10VDC
- Temperature models: J, K, E, PT100
- Temperature resistance of diaphragm: 450 C
- Temperature zero drift of pressure sensitive diaphragm: <0.3MPa/100 C
- Electrical Connection: Seven-core Connector Pin
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@Hoops40 it looks to me that you would need to provide a stable supply to the device (the datasheet says 10V recommended, but you could probably get away with 5V) and connect a strain gauge amplifier to the output.
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@dc42 thank you I will give it a go
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