Explosion-Proof Pressure Gauge (ATEX / IECEx)

-- Steady & Reliable Manufacturer --

Product Overview

Our Explosion-Proof Pressure Gauges are fully certified mechanical instruments designed for safe local pressure indication in Zone 1 and Zone 2 hazardous areas where flammable gases, vapors, or combustible dust may be present. Unlike electronic pressure transmitters that require expensive certified electronics, these all-mechanical gauges achieve explosion protection through a certified flameproof (Ex d) or dust-ignition-proof enclosure — eliminating the risk of igniting the surrounding atmosphere from any internal arcing caused by the gauge's optional electrical contacts. With ATEX and IECEx dual certification covering the widest range of global project specifications, these gauges are the cost-effective, maintenance-free choice for the oil and gas, chemical, pharmaceutical, and grain handling industries.

Technical Specification Sheet

Parameter	Detail
Pressure Range	0–1 bar up to 0–1000 bar (vacuum & compound available)
Accuracy Class	±1.6% or ±2.5% of full scale (EN 837-1)
Nominal Size	DN 100 mm (4"), 150 mm (6")
Case Material	Copper-Free Aluminum (standard) or Stainless Steel 304/316
Wetted Parts Material	Stainless Steel 316L or Copper Alloy
Fill Medium	Glycerin or Silicone Oil (standard)
Explosion Protection	Ex d IIC T6 Gb (Flameproof) — ATEX II 2 G; IECEx certified
Dust Protection	Ex tb IIIC T85°C Db (optional, for Zone 21/22)
Ingress Protection	IP66/IP67
Contact Option	Inductive proximity switch contacts (Ex ia) available

Key Features

Certified flameproof (Ex d IIC T6) enclosure contains any internal ignition source, preventing flame propagation to the surrounding hazardous atmosphere — the gold standard for Zone 1 mechanical instruments.
Dual ATEX and IECEx certification ensures acceptance on international EPC projects across Europe, the Middle East, Asia-Pacific, and the Americas without re-certification costs.
Optional inductive proximity switch contacts (Ex ia) provide intrinsically safe alarm signals for high/low pressure setpoints without compromising the Ex d housing integrity.

Typical Use Cases

Onshore Oil & Gas Production: Wellhead, manifold, and separator pressure indication in Zone 1 classified areas surrounding production equipment.
Petrochemical Plants: Process pressure monitoring on pumps, reactors, and piping systems handling flammable hydrocarbons and solvents.
LNG & LPG Terminals: Tank and loading arm pressure indication in areas with persistent risk of gas accumulation.
Pharmaceutical Solvent Handling: Pressure monitoring in classified areas where flammable solvents are processed or stored.
Grain Silos & Flour Mills: Dust-ignition-proof (Zone 21) version for pneumatic conveying system pressure monitoring where combustible agricultural dust is present.

Competitive Benefits

Zero Electronics — Inherent Reliability: The all-mechanical sensing principle means there are no electronic components to fail, short-circuit, or require battery replacement in the hazardous zone, delivering an extremely long service life with zero electronic maintenance.
Dual ATEX/IECEx Certification: Accepted on projects in over 80 countries under a single certificate, eliminating costly re-testing for international installations.
Heavy-Duty Enclosure: The IP66/67-rated aluminum or stainless steel flameproof housing withstands both the explosive containment function and the corrosive outdoor environments typical of petrochemical facilities.
Simple Compliance Documentation: Each gauge ships with a complete declaration of conformity, Ex certificate copy, and marked nameplate — meeting all documentation requirements for SIL assessments and HAZOP closeout records.
Liquid-Fill Compatible: Glycerin or silicone oil fill is fully compatible within the certified enclosure, providing vibration damping for pump and compressor installations without voiding the certification.

Payment and Shipping Details

We accept T/T (30% deposit, balance before shipment) and irrevocable L/C at sight for ATEX/IECEx certified gauges. Standard shipping is FOB Shanghai/Ningbo or CIF destination port. Standard certified models (common pressure ranges, bottom connection) are available for dispatch within 10–15 working days. Custom pressure ranges, rare connections, or dual-certified Ex d/Ex tb versions require 25–35 working days. Each unit ships with a certificate of conformance, copy of the ATEX/IECEx type examination certificate, and a calibration test report.

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Explosion-Proof Pressure Gauge (ATEX / IECEx) Manufacturers

Wuxi Huihua Special Instrumentation Co., Ltd. was established in December 2001, the registered capital is 5 million yuan, the existing staff of more than 50 small and medium-sized joint-stock enterprises.
The company specialises in the production of various types of special instruments, alternative to the localisation of imported instruments.To seismic pressure gauge, seismic electric contact pressure gauge, stainless steel pressure gauge, diaphragm corrosion-resistant pressure gauge, marine pressure gauge and other series as the main products. On the basis of field instruments, we have developed various kinds of pressure transmitters, pressure controllers, digital pressure gauges and so on. There are more than 30 series and 3000 specifications. Products are widely used in petroleum, chemical, paper, metallurgy, mining, chemical fibre, electric power, food, environmental protection, rubber and plastic, hydraulics and many other industries, and more than 2,000 domestic customers to establish a friendly relationship with the national large and medium-sized enterprises to establish a good partnership, won the majority of users praise, and set up a corporate brand image.