Dual signal pressure switch ALCO PS2-W7A, 4360100, -0.5 – 7 bar / 6 – 31 bar, automatic, differential pressure 0.5 – 5 bar, 4 bar fixed, 1/4" SAE

The ALCO PS2-W7A is a powerful, self-resetting dual pressure switch specifically designed for professional use in refrigeration, air conditioning, and heat pump systems . It combines two separate pressure ranges in a single device:

• Low pressure : -0.5 to 7 bar

• High pressure : 6 to 31 bar

This combination enables precise and simultaneous monitoring of both pressure sides – ideal for complex refrigeration systems in commercial and industrial applications.

With an adjustable differential pressure of 0.5 to 5 bar and a fixed switching pressure of 4 bar, the PS2-W7A ensures constant, reliable pressure control . The integrated dual signal function (two electrical contacts) allows simultaneous use for control and safety functions .

Thanks to the standardized 1/4" SAE flare connection, the pressure switch can be integrated into existing systems particularly quickly, tightly, and easily – without any soldering.

Advantages at a glance:

• Two pressure ranges in one device (low pressure + high pressure)

• Precise control through fixed switching pressure (4 bar) and adjustable difference

• Automatic reset saves time and maintenance

• Two electrical outputs – ideal for safety and control

• Standard connection: 1/4" SAE flare – simple & compatible

• Durable, robust and industrial-grade

🔧 Technical data:

• Model : PS2-W7A

• Article number : 4360100

• Low pressure range : -0.5 to 7 bar

• High pressure range : 6 to 31 bar

• Differential pressure : adjustable from 0.5 to 5 bar

• Fixed switching pressure : 4 bar

• Function : Automatic reset

• Signal type : Dual (two electrical outputs)

• Connection : 1/4" SAE flare

• Applications : Refrigeration and air conditioning systems, heat pumps, industrial cooling