The Apex Standard Method 5 Probe features a 1-inch diameter sheath constructed from corrosion-resistant stainless-steel, modular 3/8-inch pitot tip, 1/4-inch stainless steel quick connects, type-K thermocouples for stack and probe temperature, orsat line, and a small parts package. The Standard Method 5 Heater Probe also includes all of the above, along with a heater. Standard lengths are 3 feet to
16 feet. Probes are ordered according to nominal (liner length). Effective length is one foot less than the nominal length. Probe liners are available separately.