The Bently Nevada 148722-01 Test Plug contains 3 small test pins attached to 3 color coded 1m wires, each terminated in a banana plug. The 3-pin adapter plugs into the test pin holes on 3300 XL style Proximitor sensors. You can use this test plug to check the performance of the Proximitor sensor from the test pin holes in the terminal strip without removing the field wiring.
