Hi, i'm brian with the hvac school podcast. One nice thing that comes with having everything in one case is that you've got all of your tools in one place. The new testament probe case has both the refrigerant smart probes, as well as all of your other accessory probes and the 510. I is a great tool: we've done a video previously showing you how to measure total external static pressure.

But now let me show you something else, that's very practical, which is to measure a pressure drop across the component. You can do this across evaporator coils heat exchangers, reheat coils many other devices, but i want to show you how to do it over an air filter which is probably one of the most common differential pressure measurements that you're gon na take first off. We need to zero at the sensor now the sensor zeroed out and all we're gon na do we have one probe - that's already placed on top of the filter and we're going to place that on the negative side, because it has a higher negative pressure and then We're going to take our probe that was previously in the supply and we're gon na connect that on the other side of the filter, so that way we can measure the pressure drop. So you can see we have a point.

One three inch water column, pressure drop across this air filter, which is pretty good, given that this is a merv, 11 high efficiency air filter. The reason you would take this measurement is because in many cases you may have an air filter, that's restrictive. It could be because it's dirty, but it also could be because you have more air flow moving over a particular filter than it's designed, for this is actually more common than you may be aware of, and using a static pressure drop test like this can show you, Where the source of an airflow problem may be stemming from it's a very practical test to do, this is just another easy measurement you can take with your test. Oh smart probes, kit, all in one place in the new larger test.

Oh smart probes case thanks for watching.