Air Switch / Pneumatic Switch- Manufactured by Techmark TBS133 - Double Pole, Double Throw Alt / Mom - this means that this switch uses a combination of momentary and alternate action. When you press and hold the air transmitter or air button this will close both the mom. and the alt. switch inside. This then completes the electrical circuit to allow the pump to run and pressurise the pressure switch (TBS132) or Vacuum Switch (VTBS3002). Once the pr. switch is closed you can release the air button. This action can be stopped by either pressing the air button again causing the alternate switch to open or if the pressure drops on the pump this will open the pressure switch contact. Fits hole size:15mm
This means that instead of the switch being simply on or off, with an additional circuit connected to the lower spade, instead of being off it is now performing a 2nd operation. This can be used to toggle between a low and high speed or for use with an indicator light for example. This switch is an alternate action meaning it will hold in position 1 and then hold in position 2 when actuated. With the double pole operation this means 2 appliances can be operated on the same switch. Height: 57mm Width: 25mm (at widest point) Depth: 50mm (from front to rear spade)
This switch has 4 spade connections at the rear, 2 on each side. This is commonly referred to as single throw.