Dual-signal pressure switch Johnson Controls P78LCA-9300, -0.5 – 7.0 / 3.0 – 30.0 bar, automatic, differential pressure 0.6 – 3.0 bar, 3 bar fixed, 1/4" SAE flare

The P78LCA-9300 from Johnson Controls is an industrial-grade, high-precision dual-signal pressure switch specifically designed for simultaneous monitoring of low- and high-pressure zones in refrigeration, heat pump , and HVAC systems . Its robust construction, automatic reset , and two independent electrical outputs (dual output) make this model ideal for safety-critical applications with high reliability and control requirements.

💡 Main features:

• Two pressure zones in one device:

  • Low pressure: -0.5 to 7.0 bar

  • High pressure: 3.0 to 30.0 bar

• Adjustable differential pressure : 0.6 to 3.0 bar

• Fixed cut-off pressure : 3.0 bar for additional system safety

• Dual signal output : Ideal for separating control and safety circuits

• Automatic reset for uninterrupted continuous operation

• 1/4" SAE flare connection for easy, leak-free and solder-free installation

Thanks to its compact design, the switch can be integrated even into confined system environments . The combination of high-pressure and low-pressure monitoring makes this device a highly efficient solution for commercial and industrial refrigeration and air conditioning systems .

🔧 Technical data:

• Model : P78LCA-9300

• Print areas :
  • Low pressure: -0.5 to 7.0 bar
  • High pressure: 3.0 to 30.0 bar

• Differential pressure : Adjustable from 0.6 to 3.0 bar

• Fixed cut-off pressure : 3 bar

• Function : Automatic reset

• Signal type : Dual (2 electrical outputs)

• Connection : 1/4" SAE flare

• Weight : approx. 0.22 kg

• Packaging unit : 1 piece