• Test 600 cfm at 4 in.wg. (283 L/s at 1000 Pa).
  • Positive and negative pressure testing.
  • Simple analog gauges; no complicated multi-menu digital gauges.
  • Calibration certificate certified by Professional Engineer.
  • Accurate (+/- 2% ).
  • Swivel caster wheels to allow horizontal transport.
  • Industrial powder coated finish for long life.
  • Interchangeable orifice plates (if additional plates ordered).
  • 3-inch (75 mm) ID S304 laser-cut orifice plate.
  • Optional orifice plates at additional cost: 1/2-inch, 1-inch, 2-inch, 3-inch or 4-inch ID. [12, 25, 50, 75 or 100 mm] Click here to see maximum leakage you can test with each orifice plate.
  • 12.5 ft (3.8 m) of flexible duct.
  • 20 ft (6 m) of duct static pressure tubing.
  • Inlet slide gate damper for varying airflow.
  • More powerful blower than the Lynx tester.


  • Speed controller (115 or 230v).
  • Digital gauges run on 9v battery.
  • Smoke machine
  • Additional orifice plates for wider flow range.



  • EN 1507, Ventilation for Buildings – Sheet Metal Air Ducts with Rectangular Section – Requirements for Strength and Leakage.
  • EN 12237, Ventilation for Buildings – Ductwork – Strength and Leakage of Circular Sheet Metal Ducts.
  • Eurovent 2/2, Leakage Rate in Sheet Metal Air Distribution Systems.
  • DW/143, Ductwork Leakage Testing.
  • SMACNA Air Duct Leakage Test Manual.

professional-engineer-stampStamped and Certified.
Anything Less is Rolling Dice.

cobra duct leakage tester horizontal