Measurements; temperature, humidity and pressure, operating range; sea level to 12, 000, response time; 1 second, pressure sensor; 14 cell 2 in dia, drum rotation, 1 day and 7 day 26 x 176 hrs, chart size 11 1/2 in l, 10 1/4 in h, instruments size 12 1/2 in w, 16 in h, 6 in d
