Review on Manometer URPRO Differential Ventilation Measurement by Gary Duncan

I bought this to check the propane pressure in my RV which I found to be very low. Bought a new regulator and the new one measures fine (11wc). 2 old bad regulators rechecked: one measured 7.5, the other 9.5 wc. The only thing I don't like is the unity button. It is reset every time the meter is turned off (which happens automatically to save batteries). The WC measurement is coming to an end, so you have to reset it every time you turn it on again (press the button 7-8 times). Plus, it does exactly what is advertised.