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Ashcroft compound gauge 451279 black phenolic case 4 1/2 inch dial 30 to 60 psi

Ashcroft

Ashcroft 451279 Compound Gauge 30 to 60 psi 4 1/2 in

SKU CH-D34X-AA0YP

Compound gauge measures 30 inHg vacuum to 60 psi with ±0.5% accuracy, 4 1/2 inch phenolic case, 1/2 NPT bottom connection, and dry vibration-dampened movement

  • Color and finishBlack
  • Product typeElectronic
  • +/- 0.5 % accuracy for reliable readings
  • 4 1/2 in dial gives clear visibility
  • 30 to 60 psi range covers vacuum and pressure
  • Phenolic case resists harsh environments
  • PLUS! Performance dampens vibration without liquid fill

Ashcroft 451279 Compound Gauge 30-60 psi

The Ashcroft 451279 is a process compound gauge built for measuring vacuum and pressure in a single instrument. Its 4 1/2 inch white dial provides clear readings across a 30 Hg vacuum to 60 psi range with an accuracy of +/- 0.5 percent. The phenolic case and glass lens offer durability for industrial environments.

Suits technicians monitoring combined vacuum

This gauge fits applications requiring both vacuum and positive pressure indication on one dial. The 1/2 inch male NPT bottom connection integrates into standard process piping. It is not suited for systems exceeding the 60 psi upper limit or for installations needing a field-fillable liquid-filled case for extreme vibration protection.

Covers 30 Hg vacuum through 60 psi

The dual-scale dial comfortably handles compound measurements across the full specified span. The dry PLUS! Performance dampening resists vibration without liquid fill maintenance. Headroom ends at the 60 psi maximum; processes spiking above this value require a higher-range instrument to avoid damage.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $118.99
Pricier than about 67% of the 3,030 comparable items (median $54.99).

Specifications

Product
Brand nameASHCROFT
Color and finishBlack
Product typeElectronic

Questions about this item

Will the 1/2 in NPT male connection on this gauge fit the existing fittings on my current system?

The gauge uses a 1/2 in NPT male process connection at the bottom. It will thread into a matching 1/2 in NPT female port, which is standard on many existing industrial and hydraulic systems.

What reading on the white dial indicates the Ashcroft 451279 is operating within its +/- 0.5 Percent accuracy after installation?

Apply a known reference pressure such as 30 psi. The needle should point to 30 psi on the white dial. With +/- 0.5 Percent accuracy, the allowable error is small, so the reading must be very close to the reference value.

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