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geoff · 12-19-17, 01:01 PM

Here is a great write-up using differential pressure to measure outdoor coil frosting:

Heat Pump Defrost Cycle Information

I think he used a 0.00" to 1.00" WC DP sensor.

Acuario, you may have better luck using a single high resolution differential pressure cell. As opposed to using two atmospheric pressure sensors, and taking the difference in software.

12-19-17, 01:01 PM	#14
geoff Lurking Renovator Join Date: Dec 2017 Location: Northern BC Posts: 12 Thanks: 1 Thanked 0 Times in 0 Posts	Here is a great write-up using differential pressure to measure outdoor coil frosting: Heat Pump Defrost Cycle Information I think he used a 0.00" to 1.00" WC DP sensor. Acuario, you may have better luck using a single high resolution differential pressure cell. As opposed to using two atmospheric pressure sensors, and taking the difference in software.