The Dwyer Pressure Switch 25-1009-1AO (Cat No: G1996-20) is a compact, high-accuracy differential pressure switch designed for precise control and protection in pneumatic and air-handling applications. It monitors low pressure or differential pressure in systems handling air or non-combustible gases, providing reliable switching with minimal drift.

Featuring an adjustable range of 2–20 inches of water column (W.G.), the switch can be easily set to trip at the desired pressure point. Built with Dwyer’s rugged construction and proven diaphragm design, it offers long-term stability and resistance to vibration and surge pressures up to 10 PSI.

Key Features:

• ⚙️ Model: 25-1009-1AO

• 🧾 Catalog Number: G1996-20

• 📊 Pressure Range: 2 – 20 in. W.G.

• 💨 Maximum System Pressure: 45 in. W.G.

• 🌪️ Surge Pressure: 10 PSI (max)

• 🔩 Type: Differential / low-pressure switch

• 🧱 Construction: Durable housing with diaphragm sensing element

• 🧠 Media: Air and non-combustible gases

• 🔧 Applications: HVAC systems, air filters, duct pressure control, blower monitoring, process automation

• 🌡️ Performance: Stable set-point accuracy and repeatability

Why Choose Dwyer Instruments?
Dwyer is a global leader in pressure and flow measurement instrumentation, known for accuracy, reliability, and value. The 25-1009-1AO Pressure Switch offers consistent performance and long-term dependability, making it ideal for environmental control and industrial air systems.