STORM’s Forward Reverse Probe is ideal for determining the amount and distribution of air and/or gas flow/velocities in a duct. The Forward Reverse Probe is a calibrated “S” type pitot tube with static pressure connection and type “K” chromel-alumel temperature measuring thermocouple. The Forward/Reverse is calibrated following the ASTM D3796-09 multiselect calibration technique to a NIST traceable standard pitot tube. The probe is all stainless-steel construction. Available in 2ft increments from 4ft to 22ft, however custom sizes can be fabricated.