Intrinsically Safe Explosion-Proof Weighing Transmitter for Hazardous Industrial Environments

General Measure Technology Co., Ltd. introduces advanced intrinsically safe explosion-proof weighing solutions designed for hazardous industrial environments. These innovative products provide high-precision measurement while ensuring maximum operational safety in industries such as chemical processing, pharmaceuticals, energy production and other high-risk applications.

Challenges in Hazardous Industrial Weighing Applications

In environments where flammable gases, dust or volatile materials are present, traditional weighing equipment may face several operational and safety challenges.

Common Issues with Conventional Weighing Devices

• Load cell angle differences that can cause data drift and batching inaccuracies.
• Signal instability due to complex electromagnetic interference.
• Lack of explosion-proof certification, creating potential safety risks.

For these reasons, weighing equipment used in hazardous industrial environments must deliver not only high precision but also certified safety and reliable performance.

To address these challenges, General Measure introduces two advanced products: the GMA-JB4-Ex Explosion-Proof Junction Box and the GMT-H2ex Explosion-Proof Weighing Transmitter.

GMA-JB4-Ex Explosion-Proof Junction Box

Reliable Load Cell Connection for Hazardous Environments

The GMA-JB4-Ex is an intrinsically safe explosion-proof junction box designed for industrial weighing systems operating in hazardous areas. It acts as a reliable hub for connecting multiple load cells to weighing indicators and control systems.

Key Features of the GMA-JB4-Ex Junction Box

1. Plug-and-Play Load Cell Integration

The system supports quick connection of analog or digital load cells, allowing up to four load cells to be connected simultaneously. This simplifies installation and improves communication with weighing indicators.

2. Accurate Corner Error Compensation

Built-in adjustable potentiometers allow precise correction of corner load deviations, ensuring reliable and consistent weighing results across the platform.

3. Flexible Connection Switching

Each load cell input port is equipped with high-quality DIP switches that allow independent troubleshooting, flexible signal selection and simplified maintenance without repeated rewiring.

4. Certified Intrinsically Safe Explosion-Proof Design

• Explosion-proof certification: Ex ia IIC T4 Ga
• Protection rating: IP65
• Suitable for Zone 0 hazardous gas environments
• Equipped with five stainless-steel flameproof cable glands (Ex db IIC Gb, IP66)

5. Stainless Steel Housing with EMI Protection

The rugged 304 stainless steel enclosure provides excellent corrosion resistance and electromagnetic shielding, ensuring stable operation in harsh industrial environments.

GMT-H2ex Explosion-Proof Weighing Transmitter

High-Performance Industrial Weighing Data Transmission

The GMT-H2ex is a high-performance explosion-proof weighing transmitter designed for accurate weight measurement and reliable data transmission in industrial weighing systems.

Main Features of the GMT-H2ex Transmitter

1. Clear Display and Easy Operation

• 6-digit high-brightness LED display with 2-inch characters for clear long-distance visibility
• Four durable metal keys allow convenient operation even when wearing industrial gloves

2. Dual Power Supply Support

The transmitter supports AC 110–220V or DC 24V power input, providing flexibility for various industrial installations.

3. Reinforced Explosion-Proof Housing

• High-strength cast aluminum enclosure
• Explosion-proof certification: Ex db [ia IIC Ga] IIB T6 Gb
• Built-in intrinsically safe barrier for simplified connection to intrinsically safe load cells
• Stable performance in harsh environments including heat, humidity and dust

Advantages of the Integrated Weighing System

Explosion-Proof Safety Protection

• The junction box is certified Ex ia IIC T4 Ga and suitable for Zone 0 environments.
• The weighing transmitter is certified Ex db [ia IIC Ga] IIB T6 Gb.
• Dual protection is achieved through both enclosure protection and intrinsically safe circuit design.
• This creates a complete explosion-proof chain from load cell to display terminal.

Industrial-Grade Hardware Protection

• Junction box with stainless steel housing and IP65 protection.
• Weighing transmitter with flameproof cast aluminum enclosure.
• Designed to resist internal explosion pressure and external impact.
• Advanced EMI-resistant design ensures stable operation even near large motors or inverters.

Advanced Calibration and Compatibility

• Precision corner-load compensation system with ±0.02% correction accuracy.
• Supports both digital and analog load cells.
• Dual redundant power supply (AC 110–220V or DC 24V) for reliable operation.

Reliable Weighing Solutions for Hazardous Industrial Applications

When precision measurement meets intrinsic safety technology, industrial weighing systems become safer and more reliable. The combination of the GMA-JB4-Ex Intrinsically Safe Junction Box and the GMT-H2ex Explosion-Proof Weighing Transmitter provides a complete solution for hazardous environments requiring certified explosion-proof protection and highly accurate weighing performance.

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