The SDMN5 Dual‑Port Manometer provides precise HVAC/R pressure measurement with a wide ±60″ WC range, 0.01″ WC resolution for static pressure, and quick differential readings between P1 and P2. Built for field service, it includes a magnetic hanger, rugged boot, zeroing function, and adapters for both 3/16″ and 5/16″ ports to measure gas inlet/outlet and airflow pressures with confidence. Retail $264.00 ea