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Stainless steel compound gauge with white dial and acrylic lens

Value Brand

Value Brand 4FMK4 Commercial Compound Gauge 30 to 0 to 30 psi 2 in Dial 1/4 in NPT

SKU CH-PR2N-CFY46

Measures vacuum and pressure from 30 to 0 to 30 psi with a 2 in dial and 1/4 in NPT connection

  • TypeElectronic
  • Compound gauge reads 30 to 0 to 30 psi for vacuum and pressure jobs
  • +/-3-2-3 percent accuracy delivers reliable readings across the range
  • 304 stainless steel case resists corrosion in harsh environments
  • Acrylic lens protects the white dial from impact and scratches
  • 1/4 inch NPT male bottom connection fits standard fittings

2 in Dial Commercial Compound Gauge

The Value Brand 4FMK4 is a commercial compound gauge with a 2 in dial and a 1/4 in NPT bottom connection. It measures pressure from 30 to 0 to 30 psi with an accuracy of +/-3-2-3 percent. The case is 304 stainless steel with an acrylic lens and a white dial. It is intended for technicians monitoring vacuum and pressure in a single instrument.

Upgrade from basic vacuum or pressure gauges

This unit replaces separate vacuum and pressure gauges by combining both ranges on one dial. The jump is worth it when a system cycles between negative and positive pressure and the operator needs a single reading point. It is not suited for applications requiring liquid-filled dampening or a field-fillable case.

Limits of the +/-3-2-3 accuracy class

The +/-3-2-3 percent accuracy means the middle third of the scale is tighter than the ends. Readings near 30 psi vacuum or 30 psi pressure carry the wider tolerance. The gauge has no IP or NEMA rating and no vibration resistance, so it should not be used where moisture ingress or mechanical shock are expected.

Highlights

  • Compound gauge reads 30 to 0 to 30 psi for vacuum and pressure jobs
  • +/-3-2-3 percent accuracy delivers reliable readings across the range
  • 304 stainless steel case resists corrosion in harsh environments
  • Acrylic lens protects the white dial from impact and scratches
  • 1/4 inch NPT male bottom connection fits standard fittings

Specifications

BrandZoro Select
TypeElectronic

Questions about this item

What size NPT thread does the 1/4 in process connection require?

The gauge has a male 1/4 in NPT process connection that threads directly into a matching female NPT port.

Which step is often missed when installing this bottom-mounted gauge?

Apply thread sealant to the male NPT threads before tightening to prevent leaks at the process connection.

When should the acrylic lens be replaced on this commercial compound gauge?

Replace the lens if it becomes cracked, deeply scratched or clouded, as damage can obscure the white dial and affect reading accuracy.

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