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Silver stainless steel compound gauge with polycarbonate lens and bottom NPT connection

Ashcroft

Ashcroft 351009 Compound Gauge 30 inHg VAC to 30 psi

SKU CH-YMF3-6HJD2

Compound gauge measuring 30 inHg vacuum to 30 psi with ±1.0% accuracy, 304 stainless steel case and IP54/IP65 ratings

  • TypeElectronic
  • Compound range covers vacuum to pressure
  • ±1.0 % accuracy for reliable readings
  • 304 stainless steel case resists corrosion
  • IP54 vented or IP65 sealed protection
  • ¼ in NPT male bottom connection

Industrial compound gauge

The Ashcroft 351009 compound gauge measures vacuum to 30 inHg and pressure to 30 psi on a single dial. It suits technicians who need one instrument for both evacuation and charging tasks in HVAC and refrigeration work.

Replaces separate vacuum and pressure gauges

A jump is worth it when a job requires switching between deep vacuum pull-down and low-side pressure checks without swapping tools. The +/- 1.0 percent accuracy covers the range needed for standard system diagnostics and commissioning.

Bottom 1/4 in NPT male connection threads directly

Installation is straightforward with standard fittings. The polycarbonate lens resists impact but can scratch if wiped with abrasive cloths. The IP54 vented plug allows case breathing while the IP65 closed plug seals against wash-down; forgetting to close the plug before cleaning lets moisture enter the case.

Highlights

  • Compound range covers vacuum to pressure
  • ±1.0 % accuracy for reliable readings
  • 304 stainless steel case resists corrosion
  • IP54 vented or IP65 sealed protection
  • ¼ in NPT male bottom connection

Specifications

BrandASHCROFT
TypeElectronic

Questions about this item

What size NPT thread does the 1/4 in process connection on the Ashcroft 351009 gauge require for mounting?

The gauge has a 1/4 in male NPT bottom connection, so it threads directly into a matching 1/4 in female NPT port without adapters.

Which vent-plug position gives IP65 and NEMA 4 protection during installation of this compound gauge?

Close the vent plug before pressurising the system; with the plug closed the case meets IP65 and NEMA 4, while the open position only provides IP54.

How often should the accuracy of the 30 inHg VAC to 30 psi dial be verified against a calibrated reference?

Ashcroft specifies ±1.0 % accuracy; most quality programmes re-check compound gauges annually or whenever the pointer shows a permanent shift after over-pressure.

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