Install Spy Sensors in Walls

1. Before sheet rock

1. Install a “capture cylinder”

• Section of pipe

• Irrigation schedule 120

• 1” exterior, 7/8” interior diameter

• 4” long

• 3/8” hole 1/2” from one end

2. Mount it to a 2x4

• 3/4“ U-shaped EMT fitting

• One dry wall screw in the end

• Extending 5/8” into the room

• Ends up flush with sheet rock

3. Explain to the contractor and sheet rocker what you are doing

• Cylinder should end up flush with dry wall

• Just like a light can

4. Add the wire

• Through the rear hole (where the screw hole) and tape

• Coil 10” in the capture cylinder

• Let 6” dangle outside the cylinder

5. Expect to install about 10 capture cylinders per hour

2. After sheet rock and mud for flush finish

1. Clean cylinder with a sheet rock knife or razor

2. Put flange on spy and splice to wire

3. After the walk test, insert with a touch of silicon glue

The two pictures below show typical in-wall installations.