Calibrated range m2 to 30 degrees c; selectable range spans m2 to 30 degrees c, m2 to 10 degrees c, 8 to 20 degrees c, 18 to 30 degrees c; glass-bead thermistor sensor, 300 meter depth rating, 0.675 in. Dia, 4.1 in. L; readout module 4 in. H, 12.2 in. W, 9.5 in. D, 5.4 vdc mercury cell, 4-scale meter; operating temp range m2-30 degrees c, aluminum control panel and steel carrying case, 100 ft. L cable