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The VelociCalc® Air Velocity Meter 9545-A is like having multiple meters for the price of one. This meter simultaneously measures and data logs several ventilation parameters using a single probe with multiple sensors. It measures velocity, temperature and relative humidity; and calculates flow, wet bulb and dew point temperature. Ideal for optimizing HVAC system performance, commissioning, plant maintenance, critical environment certification and duct traverses. The 9545 model has an articulated probe.