Review on 📊 Backlit Differential Ventilation Manometer Measurement by William Rothstein

I ordered a unit off eBay for $40 but it got lost in shipping somewhere so I started buying again. I stumbled across this one at Revain and it was almost half the price (and I'm pretty sure the 'guts' are identical on these budget Chinese instruments). Anyway, this one measures in about a dozen different scales/units and also does difference measurements. All I ever needed it for was static pressure in my HVAC system, so I only cared about inches of water. This particular accuracy of reading is easily verified with a simple homemade U-tube filled with water, and I have found that this digital pressure gauge gives the exact same reading as a column of water. I see that the device is currently unavailable, but I highly recommend it; especially considering the price of $23. It comes with two short surgical hoses and a 1'8" NPT pipe fitting (which fits all oven gas valves). Excellent purchase.