Low pressure pressure switch ALCO PS1-A3A, 4370700, -0.5 – 7 bar, automatic, differential pressure 0.5 – 5 bar, 1/4" SAE

The ALCO PS1-A3A is a high-precision low-pressure pressure switch specifically designed for the requirements of modern refrigeration and air conditioning systems . With a control range of -0.5 to 7 bar, this switch is ideal for monitoring low pressure in refrigerant circuits – reliably, efficiently, and safely.

Thanks to automatic reset , the system automatically returns to operating mode as soon as the pressure returns to normal. The adjustable differential pressure from 0.5 to 5 bar allows precise adjustment to a wide variety of applications – whether heat pumps , air conditioners , or industrial refrigeration .

With the standardized 1/4" SAE flare connection, the switch can be quickly and safely integrated into existing systems – without any welding. Its low-maintenance design and high manufacturing quality guarantee longevity, even under continuous use.

✅ Product highlights:

• Low pressure control from -0.5 to 7 bar

• Adjustable differential pressure (0.5 – 5 bar)

• Automatically resets – ideal for continuous operation

• 1/4" SAE flare for easy and safe installation

• Compact & maintenance-free – perfect for commercial and industrial applications

• Designed for refrigeration systems, heat pumps, HVAC systems

🔧 Technical data:

• Model : PS1-A3A

• Article number : 4370700

• Pressure range : -0.5 to 7 bar

• Differential pressure : adjustable from 0.5 to 5 bar

• Function : automatically reset

• Signal type : Single contact (Single Signal)

• Connection : 1/4" SAE flare

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