Manometer , Professional Air Pressure Meter , Two Differential Pressure Gauge HVAC Gas Pressure Tester Measuring Range: ±20.68 kPa / ±2.999 psi ( Batteries included )

Accurate satisfactorily! Good enough for fluid mechanics lab equipments. Only for gases. And connected appropriately, the pressure is safely carried by the air in the connecting pipes to this gauge ! Can rely on Pascal to read liquid pressures

Bastante útil para medir perfiles de velocidad en función de la presión estática y absoluta, aunque el juego de conexiones que compré solo tiene el detalle de que los tubos pitot L no están perforados de la boquilla

Worked great helping me diagnose a damaged heat exchanger in my furnace. Price was great!

Seems to be well made and accurate. Used it to test low side gas pressure on my 2 stage gas valve. Easy to read and use. Includes battery and tubing along with instructions. Make sure and zero the reading before taking your reading.

I had to change out the gas regulator in my furnace and needed a manometer to adjust it after. This worked great for that. I don't think I would buy this if I was a HVAC tech and used it everyday. But for someone like me who will use it once every year or two as a routine furnace check, or swapping a gas valve, this is perfect.