Showing 17–31 of 31 results



Attaches directly to PVC pipe or fan duct with 4″ flexible coupling.

Quick and easy installation.

75% noise reduction with no back pressure.

18 1/2″ long X 6″ diameter.


Obar Floor Port


Obar floor ports are designed to be easily installed and are robust enough to handle typical building traffic.  These ports can be used as permanent sampling ports to fulfill vapor intrusion guidance document’s requirements.

Smoke Pen


The Bjornax reusable Smoke Emitter Pen is the perfect tool to dispense just the right amount of test smoke, when and where it is needed. A patented smoke-emitting wick is inserted into the clutch pencil and ignited. You can adjust the wick to provide a continuous stream of a light gray to white smoke. The Smoke Pen can be easily extinguished by simply replacing the protective cover. Wick diameter is 5.6mm and will burn for approximately 30 minutes each.

This cool burning, non-toxic emitter is ideal for air balancing, verifying ventilation, testing smoke alarms, test for negative or positive air pressure.


  • Operates like a mechanical pencil.
  • The smoke and wick are non-toxic, with no shipping regulations
  • Excellent method to visualize airflow patterns
  • 6 wicks will provide up to 3 hours of continuous smoke or 360 individual 30 second tests
  • Steady and continuous smoke-stream, you decide smoke-duration
  • Non-turbulent smoke-stream = extremely low thermal interference
  • Helps to reveal the smallest leaks or air-current
  • Particle size is 0.3 to 2.5 microns
  • Does not contain oil, zinc, rubber powder or naphthalene