The Professional flow limiter Mk2 is equipped with a regulator that reduces the gas to flow at a constant 0.2 L/min rate at 10 bar regardless of the cylinder pressure. This enables the gas sampling to remain accurate even at very low cylinder pressures. This feature has proven to be critical during gas blending procedures. The improved Mk2 design replaces the previous model and combines the relief valve with the gas sampling nozzle in a single mechanism. Closing the gas sampling nozzle will first engage the relief valve and vent the remaining gas from within. This version fits standard scuba 200 and 300 bar DIN (aka G 5/8) cylinder valve outlets. Does not include a #8009 connection hose, which may be ordered separately.