THIS IS THE OLDER STYLE HYDRO QUIP HI LIMIT SENSOR THE BULB IS STAINLESS STEEL 1/4" DIAMETER X 1-1/2" LONG CABLE IS 14" LONG THE CIRCUIT BOARD CONNECTOR IS A RED 4 PIN CONNECTOR ONLY 3 WIRES CONNECT TO THIS FROM THE SENSOR ONLY 3 PINS ARE USED ON THE CONNECTOR, SO ONE PIN HOLE IS PLUGGED GECKO PART NUMBER IS 9920-400122 THE NEWER STYLE USES A BLACK 2 PIN CONNECTOR SEE INYO NUMBER 9286-18 FOR THIS
