Sensor Photos are shown at: MC Sensors page
| 
 Size & Shape  | 
 Size, inches  | 
 Size, mm  | 
 Connector  | 
| 
 B1 is small square Box  | 
 1” x 1” x 0.8”  | 
 25x25x20mm  | 
 BNC(f) on box  | 
| 
 B1wm same as B1, with wire outputs, and mounting tabs  | 
 1” x 1” x 0.8”  | 
 25x25x20mm  | 
 2-wire leads  | 
| 
 B2 is medium rectangular Box  | 
 2.1” x1.6” x1.2”  | 
 52x40x29mm  | 
 BNC(f) on box  | 
| 
 C3 is medium Cylinder  | 
 2.75” x 0.875”  | 
 70 x 22mm  | 
 BNC(m) on coax  | 
| 
 C4 is large thick Cylinder  | 
 4.0” x 1.125”  | 
 102 x 29mm  | 
 BNC(m) on coax  | 
| 
 C5 is long thin Cylinder  | 
 5.25” x 0.750”  | 
 133 x 19mm  | 
 BNC(m) on coax  | 
The following models have wire output, not BNC or coax: MC06, MC14, MC19, MC95RW.
The shape (Rectangular box or Cylindrical) had no effect on electrical output, but the length of coax cable does, especially for resonant sensors, or above 30 kHz.