Magtrol JB 113 and JB 114 Junction Boxes JB113 JB114 Product Description: Up to 4 LB Load Measuring Pins (full-bridge strain gauges) can be connected in parallel to the LMU Load Monitoring Unit, using a JB 113 (2 load pins in parallel) or JB 114 (4 load pins in parallel) junction box. Downloads: General Specifications Related links: Motor Testing Load-Force -Weight Systems Torque Transducers Displacement Transducers Rotary Transmitters