3 ranges, 40 to 4000 micromhos/cm, 400 to 40000 micromhos/cm, 4000 to 400000 micromhos/cm, range selection is by panel mounted switch, automatic temp compensator 32 to 122 degrees f, temp range 0 to 50 degrees c, measuring circuit is manually balanced ac wheatstone bridge excited with 400 hz current supplied by a transistor oscillator provided with center zero meter as null indicator, porm 2 pct. Accuracy, housed in drawn aluminum splashproof case with carrying handle, case dimensions 7 in. W, 8 in. H, 5 in. D, 9 v battery, white inscription on meter face with black background
