Sensortech

Fire Fighting Accessories

Pressure Gauges

Pressure Gauges

This Bourdon tube pressure gauge is designed for accurate and reliable air and water pressure measurement in industrial and commercial applications. Manufactured with a durable copper alloy C-type Bourdon tube, it ensures consistent performance and long service life. The 4-inch pressure gauge features a clear white aluminum dial with black and red markings for easy readability. Compliant with EN 837-1 and ASME B40.100 standards, it delivers Grade B accuracy under steady and fluctuating pressure conditions. The robust polycarbonate case and snap-in clear window provide added protection, while the 1/4″ NPT lower mount connection allows easy installation across multiple systems. UL Listed and Factory Mutual approved for assured safety and reliability.

Applications

  • Fire sprinkler systems
  • Suitable for all media that will not obstruct the pressure system or attack copper alloy parts

Special Features

  • UL-listed (UL-393), United States and Canada
  • Factory Mutual (FM) approved
  • Reliable and economical

Pressure Gauge Specification

Specification Details
Product Name Pressure Gauge
Application Air and Water Pressure Measurement
Gauge Type Bourdon Tube Pressure Gauge
Bourdon Tube Design C-Type
Compliance Standards EN 837-1, ASME B40.100
Dial Size / Diameter 4 inch (100 mm)
Accuracy Class ±3/2/3% of span (ASME B40.100 Grade B)
Pressure Range – Air 0–80 psi (retard up to 250 psi)
Pressure Range – Water 0–300 psi
Connection Size 1/4″ NPT
Mounting Type Lower Mount (LM)
Pressure Connection Material Copper Alloy
Movement Material Copper Alloy
Dial Material White Aluminum
Dial Markings Black and Red Lettering
Dial Features Integrated Stop Pin
Pointer Material Black Aluminum
Working Pressure – Steady Load Up to 75% of full-scale value
Working Pressure – Fluctuating Load Up to 66% of full-scale value
Working Pressure – Short Duration Full-scale value
Case Material Black Polycarbonate
Window Type Snap-in
Window Material Clear Polycarbonate
Operating Temperature (Ambient) −40°F to 140°F (−40°C to 60°C)
Maximum Media Temperature 140°F (60°C)
Temperature Effect on Accuracy ±0.4% of span per 10°C (18°F) deviation from 20°C (68°F)
Certifications & Approvals UL Listed (UL-393), Factory Mutual Approved

Dimensions & Weight

Size Unit A B C E L T W Weight
4″ mm 100 71 30 11.5 3.75 14
4″ inch 4.0 2.79 1.18 0.45 0.15 1/4″ 0.55 0.35 lb

Details