GD40-2-01, Differential Pressure Gauge
The pressure differential at the inlet and the outlet of compressed air equipment can be viewed at a glance on the pressure differential gauge. It is ideal for the maintenance control of filters. Compact and lightweight, it can be installed easily by merely providing a bypass circuit. GD40 is provided with a protective cover to prevent hazards. 

G(A)46, Pressure Gauge, w/Limit Indicator & Cover Ring Assembly (O.D. 42)
SMC offers a variety of pressure gauges including general purpose, oil-free/external parts copper-free with limit indicator, clean series and a pressure gauge with a pressure switch. Pressure ranges vary from 0 to 1.5MPa, depending on the seleced gauge. Panel mounting is possible.
General purpose gauge w/limit indicator
Back or vertical side thread
Indication precision: ±3% F.S. (full span)

G(A)36, Pressure Gauge for General Purpose (O.D. 37)
SMC offers a variety of pressure gauges including general purpose, oil-free/external parts copper-free with limit indicator, clean series and a pressure gauge with a pressure switch. Pressure ranges vary from 0 to 1.5MPa, depending on the selected gauge.
General purpose pressure gauge w/limit indicator
Back side or vertical side thread
Pressure range: 0 to 1.5MPa (0 to 225psi)
Indication precision: ±3% F.S. (full span)

Functional and constructive characteristics

Dail size：40φ ~ 150φ
Scale range：-1~0 to 0~1000 kg/cm²
Accuracy class per EN 837-1：±1.6% f.s.d

OG ： Liquid-Filled pressure gauge

Introduction

Designed for diesel engines, machine tools, hydraulic systems, air-conditioning equipment, where constant virbrations, pressure fluctuations and non-corrosive conditions are present.

Characterization

1. Manufacture process obey ISO-9001 standard.
2. Complete specifications.
3. Stable and durable.
4. 100% made in Taiwan.
5. Technological cooperation with Europe.
6. Reasonable price.
7. Customize accepted. 

Functional and constructive characteristics

Dail size：40φ ~ 100φ
Scale range：-1~0 to 0~1000 kg/cm²
Accuracy class per EN 837-1：±1.6% f.s.d