AI-TEK 70085-1010-227 Speed Sensor | 1/4-40 Thread, High Temp By wayne No Comments on AI-TEK 70085-1010-227 Speed Sensor | 1/4-40 Thread, High Temp 2 Min Read Shop the AI-TEK 70085-1010-227 speed sensor. This passive magnetic pickup features a 1/4-40 thread, 4.7 V P-P output, and operates from -73 to 232°C.