Dual signal pressure switch ALCO PS2-A7K, 4350900, -0.5 – 7 bar / 6 – 31 bar, automatic, differential pressure 0.5 – 5 bar, 4 bar fixed, 1/4" SAE

The ALCO PS2-A7K is a professional dual-function pressure switch designed for simultaneous monitoring of high and low pressure areas in complex refrigeration systems, heat pumps and industrial HVAC systems .

With two separate pressure ranges – -0.5 to 7 bar (low pressure) and 6 to 31 bar (high pressure) – this switch is perfect for applications that require safety, precision, and reliability .

The integrated automatic reset mechanism reduces maintenance effort and quickly restores operational readiness. The adjustable differential pressure (0.5–5 bar) combined with a fixed switching pressure of 4 bar ensures stable, pressure-controlled system operation.

Thanks to the 1/4" SAE flare connection, the PS2-A7K can be easily and quickly integrated into existing systems without complex soldering. Ideal for commercial refrigeration, heat pumps, and industrial cooling circuits .

Your benefits at a glance:

• Two separate switching points for high and low pressure

• Precise pressure control through fixed switching pressure (4 bar)

• Adjustable differential pressure – flexibly adaptable

• Automatically resets – for trouble-free continuous operation

• Two electrical signal outputs – dual function for control & safety

• Standard 1/4" SAE flare connection – easy installation without soldering

• Robust construction for long-lasting use in commercial systems

🔧 Technical data:

• Model : PS2-A7K

• Article number : 4350900

• Low pressure range : -0.5 to 7 bar

• High pressure range : 6 to 31 bar

• Differential pressure : adjustable from 0.5 – 5 bar

• Fixed switching pressure : 4 bar

• Function : automatically reset

• Signal type : Dual Signal (two electrical outputs)

• Connection : 1/4" SAE flare

• Areas of application : refrigeration technology, heat pumps, industrial air conditioning