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Black phenolic process pressure gauge with 4-1/2 inch white dial and 1/2 inch NPT bottom connection

Ashcroft

Ashcroft 451279 Process Pressure Gauge 0-15 psi 4-1/2 in 1/2 in NPT

SKU CH-DJ8T-66MN0

Measures pressure from 0 to 15 psi with ±0.5% accuracy on a 4-1/2 in phenolic case, 1/2 in NPT bottom connection

  • Color/FinishBlack
  • TypeElectronic
  • ±0.5 % accuracy for precise low-pressure readings
  • 4-1/2 in phenolic case resists corrosion in process environments
  • 1/2 in NPT bottom connection fits standard piping
  • 0-15 psi range suits low-pressure monitoring tasks
  • glass lens protects dial while maintaining clear visibility

Precision Process Gauge for Low-Pressure Systems

The Ashcroft 451279 is a new process pressure gauge built for monitoring 0 to 15 psi ranges. Its 4-1/2 inch phenolic case and white dial with glass lens provide clear readability in industrial environments. The 1/2 inch male NPT bottom connection suits standard piping installations. This instrument targets technicians and plant operators who need reliable local indication.

Replacing Worn Analog Gauges in Clean Media Service

This unit replaces damaged or inaccurate gauges on compatible low-pressure lines where ±0.5 percent accuracy is required. The jump is worth it when the existing dial is fogged, the movement sticks, or calibration drift exceeds tolerance. It does not suit applications needing liquid-filled dampening, vibration resistance, or field-fill capability for glycerin or silicone.

Verify Connection, Range and Mounting Before Order

Confirm the process tapping accepts a 1/2 inch male NPT thread and that the 5.375 inch bolt circle matches your panel cut-out. Ensure the media is compatible with a dry, non-filled phenolic case and glass lens. This gauge is not for buyers who need IP/NEMA-rated sealing, top or back connections, or pressure ranges beyond 15 psi.

Highlights

  • ±0.5 % accuracy for precise low-pressure readings
  • 4-1/2 in phenolic case resists corrosion in process environments
  • 1/2 in NPT bottom connection fits standard piping
  • 0-15 psi range suits low-pressure monitoring tasks
  • glass lens protects dial while maintaining clear visibility

Specifications

BrandASHCROFT
Color/FinishBlack
TypeElectronic

Questions about this item

What bolt-circle diameter does the 4-1/2 in gauge need for panel mounting?

The gauge requires a 5.375 in bolt-circle diameter for secure panel mounting.

How should the 1/2 in NPT male connection be sealed during installation?

Apply PTFE tape or pipe thread sealant to the male threads and tighten to the recommended torque; the most common error is over-tightening and cracking the phenolic case.

When should the glass lens be replaced on this process gauge?

Replace the glass lens if it becomes scratched, cracked or clouded so the white dial remains clearly readable at the 0.5 % accuracy level.

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