Visual Only Features
Compare these features with other manufacturer's products !

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  • U.S. & Foreign Patented Ball-In-Tube Technology…

  • Indicates the actual directional airflow, as opposed to an absolute differential pressure reading!

  • Simple, Visual, Accurate and Reliable !

  • Visual SELF-CHECK performs each time the door is opened !!!

  • Installs in minutes . . .

  • No electricity or linkages are required!

  • Sensitive to 0.001" water column (0.007" w.c. with fail-safe feature)…

  • Failsafe feature allows an operational self check everytime you open the door.

  • Lifetime Warranty vs. Breakage ! 

  • Great item to function as either a stand-alone or as a safety check for existing monitors !

Click here to see VISUAL ONLY monitors!