- Regular price
- $72.00
Secure Payment & Return Policies
Secure Payment & Return Policies

We use highly secure payment platforms, including Shop, Shopify Payments, Paypal, and Google Pay, to ensure your peace of mind. Here's what you can count on:
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Secure Transactions: Our partners are industry leaders in payment security, using cutting-edge encryption to protect your data.
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Fraud Protection: Rigorous fraud detection measures are in place to safeguard your transactions.
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Flexible Payment Options: Choose from various trusted payment methods, including credit cards and digital wallets like Google Pay and Paypal.
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Buyer Protection: Benefit from the buyer protection policies of our partners, ensuring refunds and dispute resolution.
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Satisfaction Guarantee: We're confident in our products, and our customer support team is here to assist you if any issues arise.
- Return Policies: Please visit our policies to safely return any products that doesn't match your expectations.
Please feel free to contact us through our contact channels, our online chat there is always a team member online to help you out! If you prefer to call, our number is 0 401 690 551.
FAQs - Frequently Asked Questions
FAQs - Frequently Asked Questions
- Regular price
- $72.00

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Siemens Differential Pressure Switch from the QBM81 Series. Designed for air pressure monitoring, this advanced switch offers precision and performance in one compact package.
Key Features:
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Air Pressure Monitoring: The QBM81 Series serves as your vigilant guardian, continuously monitoring air filters, airflow, and fan belts. It ensures your HVAC system operates at its best.
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Versatile Applications: This pressure switch isn't limited to HVAC systems alone. It's the ideal choice for monitoring pressure in clean rooms, kitchens, and other environments where air quality and pressure management are critical.
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Effortless Installation: Installing the QBM81 Series is a breeze, saving you valuable time and effort.
Applications:
The Siemens QBM81 Series Differential Pressure Switch is a versatile solution that finds its place in various applications:
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HVAC Systems: Maintain optimal performance and energy efficiency in your heating, ventilation, and air conditioning systems.
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Clean Rooms: Ensure the highest air quality standards and pressure management for critical environments.
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Kitchens: Keep a close watch on the pressure in kitchen exhaust systems to guarantee safety and efficiency.
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General Air Quality Control: Use the QBM81 Series to monitor pressure variations in rooms and spaces where air quality is a concern.
Product Numbers:
Choose from three different models, each tailored to specific pressure ranges, ensuring the Siemens QBM81 Series is the perfect match for your needs:
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QBM81-3: Monitors pressure in the range of 0.08 to 1.20 inches WC.
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QBM81-5: Designed for pressure monitoring within the range of 0.20 to 2.00 inches WC.
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QBM81-10: Covers pressure monitoring from 0.40 to 4.00 inches WC.
Part Numbers:
QBM81-3 Differential Pressure Switch Air/Gas 20…300Pa Adjustable Switching Differential
QBM81-5 Differential Pressure Switch Air/Gas 50…500Pa Adjustable Switching Differential
QBM81-10 Differential Pressure Switch Air/Gas 100…1000Pa Adjustable Switching Differential
QBM81-20 Differential Pressure Switch Air/Gas 200...2000 Pa Adjustable Switching Differential (S55720-S125)