Description Accessories Description The Air Velocity, Temperature, and Humidity Straight Probe is an accessory for the AirPro Model AP500. State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Literature & Docs Accessories TSI Alnor AirPro Velocity Meter AP500 TSI Alnor Probe Protective Case 800536 Was: Now: $65.00 Add To Cart The item has been added