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Dual Scale Industrial Pressure Gages, ± 2.5% Accuracy, 304 SS, 1/8" NPT
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Series-SG3

Dual Scale Industrial Pressure Gages, ± 2.5% Accuracy, 304 SS, 1/8" NPT

  • Stainless steel housing to resist ambient corrosion for longer service life in harsh environments
  • Good accuracy gage for value-sensitive applications requiring more precise measurement and where vibration is a concern
  • Back or bottom mounting and compact size provides for mounting with dimensional limitations
Series-SG3
From TWD 1,628
Shop Models
3 Variations available
See all series options below
Series-SG3Data Sheet

Data Sheet
Dual Scale Industrial Pressure Gages, ± 2.5% Accuracy, 304 SS, 1/8" NPT Series-SG3 Series-SG3
Product Overview
  • Accuracy ± 2.5 %
  • Accuracy Detail 2.5% FS
  • Applications Pneumatic Systems
  • Dial Dia 1.5 in
  • Materials 304 Stainless Steel, Polycarbonate
  • Materials, Wetted Stainless Steel
  • Media Compatibility Clean dry air / inert gas, Clean process / cooling water, Compatible Liquids, Inert / non-reactive gases, Oils / lubricants, Organic solvents, Water
  • Operating Temperature, Max 140 °F
  • Operating Temperature, Min -4 °F
  • Process Connection Type NPT Male
  • Proof Pressure 100% Full Scale
  • Series ID Series-SG3

Supported Applications

The Dwyer Series SG3 consists of 1.5" (40 mm) stainless steel industrial pressure gages designed for measuring compatible gases and liquids in harsh environments. These mechanical instruments feature a dual scale display showing psi and bar (x100 kPa). The series is engineered with corrosion-resistant materials to suit applications requiring chemical compatibility, including corrosive ambient conditions.

Operating Conditions & Performance

The Series SG3 delivers ±2.5% full-scale accuracy across a measurement envelope ranging from 30" Hg vacuum to 300 psi positive pressure. Specific available ranges include 30" Hg to 0, and 0 to 30, 60, 100, 160, 200, or 300 psi. The gages operate within an ambient temperature limit of -4 to 140°F (-20 to 60°C). Pressure limits are defined as the full-scale (FS) range for each model.

Configuration Options

The series offers configurable mounting and material options tailored to specific installation needs. Key capabilities include:

  • Housing & Wetted Materials: 304 SS housing with a polycarbonate lens; wetted parts consist of a 316 L SS tube and 316 SS connector.
  • Process Connections: 1/8" male NPT available in bottom or back mounting configurations. Model numbers ending in "21N" indicate a bottom connection, while changing the suffix to "41N" specifies a back connection.
  • Scales & Display: Dual psi and bar (x100 kPa) scales on the dial face.
  • Dimensions: 1.5" (40 mm) diameter with an overall height of 1-27/32 [47.00] for both bottom and back connections.

Optional accessories include the A-445B U-bracket mounting kit for 1.5" gages and a NIST traceable calibration certificate (order code NISTCAL-PG1).

Key Product Differences

The Series SG3 is distinguished from the similar Series SG1 by its wetted material composition; while both series share the same 304 SS housing, ±2.5% FS accuracy, and dual-scale display, the SG3 utilizes a 316 L SS tube and 316 SS connector for enhanced chemical compatibility compared to the brass connector and bronze tube found in Series SG1 models.

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