Constant pressure charts illustrate the varying *height* of a specific constant pressure surface (e.g., 500 mb), contrasting with surface charts which depict varying *pressure* at a constant height ...

Palmer Wahl has added differential pressure chart recorders to its existing line of mechanical circular chart recorders. The recorders feature an edge welded rupture-proof pressure cell for up to 30% ...

Question: What are constant pressure charts? Answer: Constant pressure charts like the 500 mb chart shown below may seem obvious to interpret. It has many features similar to what you might see on the ...