The utility model discloses a teletransmission formula SF6 gas density table, at the sino -Canada cogged of the indicator gear drive of traditional mechanical type density meter system, the gear is connected with controlling resistor, and controlling resistor's resistance value changes and the change along with the angle of indicator, and through collection controlling resistor's electric resistance change signal, the relation of utilizing gear rotation angle and electric resistance change can calculate finger needle position and put the density value that corresponds to produce the digital output signal. Compare with current teletransmission epiphase, need not install pressure sensor alone additional at the kneck, reduce the manufacture craft degree of difficulty, can effectively improve the gas tightness of kneck, reduce the density meter leak rate, improve product quality, because of teletransmission density signal derives from the change of pointer angle, can guarantee the uniformity of mechanical type total indicator reading and teletransmission data reading to improve product debugging efficiency.