Ashcroft 250-3074 Pressure Gauge, 0 to -30 inH₂O

The Ashcroft 250-3074 is a precision low-pressure gauge designed for vacuum measurement in inches of water column. It is ideal for monitoring low-pressure air and gas applications in HVAC systems, filter monitoring, and clean room environments. Model: 250-3074 Type: Mechanical analog pressure gauge Pressure Range: 0 to -30 inH₂O (vacuum) Dial Diameter: Approx. 2.5" Connection Type: Lower mount, likely 1/4" NPT brass Movement: Brass Socket Material: Brass Diaphragm Material: Beryllium Copper Window: Polycarbonate or acrylic lens Case Material: Stainless steel or aluminum knurled bezel Display Units: inH₂O vacuum Adjustable Pointer: Yes (marked “ADJ” on dial) Typical Applications: HVAC, pneumatic systems, cleanrooms, laboratory use, filter monitoring Accuracy Class: ±2-3-2% of span (typical for Ashcroft low-pressure gauges) Please review pictures carefully and let us know if you have any questions!