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Stainless steel vacuum gauge with acrylic lens and bottom NPT connection

Value Brand

Value Brand 4FML8 Commercial Vacuum Gauge +/-3-2-3% Sil

SKU CH-0KY0-SCR1R

Electronic commercial vacuum gauge with 304 stainless steel case, 316 stainless steel sensor and socket, 1/4 in NPT male bottom connection and +/-3-2-3% accuracy

  • TypeElectronic
  • +/-3-2-3% accuracy ensures reliable vacuum readings
  • 304 stainless case resists corrosion in harsh environments
  • 316 stainless sensor and socket withstand aggressive media
  • 1/4 in NPT male bottom connection fits standard fittings
  • Acrylic lens protects dial while maintaining clear visibility

What this gauge is and who uses it

This ZORO SELECT 4FML8 is an electronic commercial vacuum gauge built with a 304 stainless-steel case and 316 stainless-steel sensor and socket parts. It measures vacuum with a stated accuracy of +/-3-2-3 percent and carries a Proposition 65 warning for chemicals linked to cancer and reproductive harm. The unit is sold new and intended for technicians who need a bottom-mounted, male NPT instrument for general vacuum checks.

How it fits into a test setup

The gauge connects through a 1/4-inch male NPT thread at the bottom, so it threads directly into a matching female port on a chamber, manifold or pump line. Its acrylic lens protects the dial while the all-stainless wetted path resists corrosion from common process gases. Because the case is not panel-mountable, the instrument sits inline or on a short nipple rather than being flush-mounted in a control panel.

Thermals noise and power draw

As a purely mechanical electronic gauge it has no active cooling, fan or external power supply, so it adds no audible noise or electrical load to the system. The stainless-steel construction handles normal ambient temperature swings without drift beyond the published accuracy band. No IP or NEMA rating is claimed, so the unit should be shielded from direct liquid spray or heavy condensation in the work area.

Highlights

  • +/-3-2-3% accuracy ensures reliable vacuum readings
  • 304 stainless case resists corrosion in harsh environments
  • 316 stainless sensor and socket withstand aggressive media
  • 1/4 in NPT male bottom connection fits standard fittings
  • Acrylic lens protects dial while maintaining clear visibility

Specifications

BrandZORO SELECT
TypeElectronic

Questions about this item

What is the gauge accuracy across the full scale range?

Accuracy is rated at +/-3-2-3 percent, meaning three percent in the first and last quarters and two percent in the middle half of the dial.

Does the gauge carry any IP or NEMA environmental rating?

The gauge is not IP or NEMA rated, so it has no certified protection against dust or water ingress.

What process connection does the gauge require?

It uses a 1/4 inch male NPT bottom connection, so the system must provide a matching female NPT port.

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