Pcba service for small on/off switch as an external accessory for sensor

Buy offer Details

Dear Sir/Madam,
This is Rodney Bellido de Luna from Chile
Im looking for small PCB with an on / off switch. Check Image 1 in green as a drawing prototype.
We need to add a Switch as an EXTERNAL accessory to our sensor (the small black box image 2)
This sensor works with a battery 2032 (not confirmed).
To activate the sensor the customer need to twist the wires (image 3)
Some particular customers re use this sensor and the cables brakes up or disjoints so the data measures stops (image 4), we want to prevent this, with an accessory that they can install between the wires with an on/off switch.
We can also add this external PCB accessory before the product sale if the installations is easy.
We need a good looking professional final product so we can make a prototype test and then passing to the production massive sales.
The sensor is used in an industrial environment with dust and wet spills, the PCB External Accessory have to be IPX4
Shipment Type : by Air