Technical differentiating characteristics, a. 4-1/2 in. Plastic front, b. 10 ohm resistor, c. 0 to 2000 degrees f range, d. For use on emergency air-fed incinerator, model no. 1, e. Operating data, /1/ 208 v, 50/60 cycles, ac, 3 phase, 4-wire, /2/ 220-380 v, 50/60 cycles, ac, 3 phase, 4-wire
