Pneumatic Switch

This is the switch mechanism that forms the basis of the sip-puff switch. It is also available with a squeeze ball or individually.

The pneumatic switch has two ports for connecting tubing. If tubing is connected to the port labeled LOW the switch will operate as a sip switch. When connected to the port labeled HIGH the switch operates as a PUFF switch. A two function sip puff switch is also available. A sputum collector is required is using oral air to activate.

maximum sensitivity for the squeeze ball action can be obtained by shortening the tubing
dimensions of switch mechanism | 50 x 40 x 10 mm (2 1/4 x 1 1/2 x 1/2 inch)
weight of switch mechanism | 15 gm ( 1/2 oz)
operating force | 0.02 psi
dimensions of squeeze bulb | 6 L x 4 D cm ( 2 1/4 x 1 5/8 inch)
weight of ball | 30 gm ( 1 oz)
if creating your own sip puff switch it is important to incorporate a saliva trap into the design to prevent liquid entering the switch mechanism.