jrn8265 wrote:I would instead recommend a Magnahelic off of Ebay. I have mine connected all the time and I can see the draft in real time anytime.
Dwyer Magnehelics are used by a good number of members too. Model 2000 is the correct scale for our use. They can be found for a little more money than the oil filled ones.
Factory calibrated and Re-calibration has not been reported to be an issue.