Mini low-pressure pressure switch Johnson Controls P100 AP-50D, NO, 0.28 – 2.21 bar, automatic, SPST, 1/4" SAE flare

The Johnson Controls P100 AP-50D is a high-precision miniature pressure switch specifically designed for monitoring very low operating pressures in refrigeration, heat pump, and HVAC systems . With an extremely sensitive switching range of 0.28 to 2.21 bar, this model is ideal for applications where even small pressure changes must be reliably detected and switched .

Equipped with a normally open (NO) SPST contact, the circuit remains open in the idle state and closes automatically as soon as the preset pressure is reached. The integrated automatic reset enables safe, maintenance-free continuous operation without manual intervention.

The standardized 1/4" SAE flare connection allows for quick, leak-free installation without soldering , making it ideal for service calls, maintenance, and retrofits .

✅ Product advantages at a glance:

• Ultra-sensitive switching range: 0.28 – 2.21 bar

• NO function (Normally Open): closes automatically when pressure is reached

• SPST contact: easy integration into control circuits

• Automatic reset: no manual reset necessary

• 1/4" SAE flare connection: tool-free, leak-free installation

• Ideal for refrigeration systems, heat pumps, HVAC systems and sensitive pressure monitoring

🔧 Technical data:

• Brand: Johnson Controls

• Model: P100 AP-50D

• Type: Mini low pressure pressure switch

• Pressure range: 0.28 – 2.21 bar

• Function: NO (Normally Open)

• Contact: SPST

• Reset: Automatic

• Connection: 1/4" SAE flare

• Applications: Refrigeration systems, heat pumps, HVAC technology, sensitive pressure monitoring

Weight: approx. 0.14 kg
Scope of delivery: 1 × Johnson Controls P100 AP-50D mini pressure switch, NO, automatically reset