Review on Manometer Unit Pressure Measurement Differential by Issac Smart

I had to buy an inexpensive flow meter to use only once to check the draft on my Harmon P-68 pellet stove. After evaluating very expensive draft gauges designed just for this purpose, I found a model PYLE #PDMM01 gauge. it accurately measures both positive and negative pressure on an easy-to-read LED screen. This is a great value, good quality and easy to use product - it comes with connecting hoses, fittings, a carrying case and even a battery. All I had to do was buy a rubber cone adapter that is used for car vacuum tests to connect the hose that comes with the gauges to the test port on my stove. after using the gauge once to fine-tune your stove without guessing - stoves have never worked so well, almost doubling the heat output and even saving the amount of wood pellets. Great product, basically paid for itself in just one use.