Orientation sensor especially suitable for use in an underground boring device

In producing a pitch sensor capable of generating an output voltage indicative of fluid displacement within the pitch sensor in a number of specific operating modes, a method comprising:

• providing a pitch sensor housing defining a closed, elongated internal chamber which itself defines a central elongation axis;
• disposing a predetermined number of electrically conductive members, the number members of which is dependent upon the number of operating modes the pitch sensor is intended to operate in, at different predetermined spaced apart locations within said chamber and along said elongation axis;
• and
• containing a flowable material within said chamber such that, in each different mode of operation of the pitch sensor, a ratio between an electrical property between a first one of the members and a second member to the corresponding electrical property between a third member and the second member is indicative of displacement of said flowable material within said housing chamber, wherein all of the modes of operation of the pitch sensor utilize different combinations of the conductive members such that the pitch sensor is capable of generating an output voltage indicative of such material displacement for each mode of operation.