The Siemens QBM81-5 differential pressure switch is designed for monitoring air filters, airflow, and fan belts in HVAC systems. It can also be used to monitor pressure in clean rooms and kitchens. With a pressure range of 0.5–5 mbar (50–500 Pa), this switch ensures system efficiency and safety by detecting differential, underpressure, and overpressure conditions. The QBM81-5 offers precise switching, long-term stability, and over 1 million switching cycles, making it a reliable component for long-term use.

Key Features:

• Pressure range: 0.5–5 mbar (50–500 Pa)
• Suitable for air and non-aggressive gases
• Over 1 million switching cycles
• Ideal for HVAC systems, clean rooms, and kitchens
• Easy installation with duct adaptors and 2-meter tubing included

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