An ideal instrument for ventilation surveys air conditioning heating and environmental monitoring 04 to 30msec x 01 measures air velocity in msec ftmin mph kmsec or knots measures volume in mmin cmm or ftmin cfm measures temperature c or f 35mm hi contrast lcd display with backlight and function indicators dual display for velocity and temperature 16 segment bargraph for velocity data hold minmax hold for airflow and temperature average function based on the last