982 Indoor Air Quality Probe by TSI Plan:10 Day The TSI Alnor HM685 is

The TSI Alnor HM685 is a professional-grade hydronic manometer that simultaneously measures and displays differential pressure

and wind direction

It supports up to 1

This results in performance characteristics which are identical

Cylinder Size: 7 Liters

982 Indoor Air Quality Probe by TSI Plan:10 Day The TSI Alnor HM685 isThe TSI VelociCalc 982 Indoor Air Quality (IAQ) Probe is a plug in sensor for the TSI VelociCalc 9565 P meter that measures carbon monoxide (CO), carbon dioxide (CO), temperature, and humidity in one device. Its designed for indoor air quality investigations, ventilation assessments, laboratory and cleanroom studies, and HVAC commissioning. With measurement ranges of 0500 ppm CO, 05,000 ppm CO, 14 to 140F ( 10 to 60C) for temperature, and 5 to 95% RH,