*NEW* TSI 9555 /9565 Multi functional ventilation unit

“The VelociCalc 9555 Multi-Function Ventilation Meter is a portable, hand held ventilation test instrument. This instrument is designed to work with a wide range of plug-in probes. measurements include air velocity, temperature, humidity, pressure,  Calculations include air flow, heat flow, turbulence, wet bulb and dew point temperature.”