Gas Transmitter

A Gas Transmitter is a device that interfaces with gas sensors to transmit measurement data in the form of a 4-20mA DC current signal. It ensures seamless communication between sensors and control systems such as PLCs, actuators, and panel meters.

Gas transmitters from Husaini® Engineers play a crucial role in industrial process monitoring and control, ensuring accurate data transmission from sensors over distances with minimal signal loss. Designed for two-wire 4-20mA current loop systems, these devices convert sensor signals into reliable control signals, making them indispensable for various industrial applications.

A Gas Transmitter ensures:

• Accurate representation of sensor signals.
• Seamless integration with control systems.
• Long-term reliability in harsh environments.

By converting real-world sensor signals into actionable data, gas transmitters are the backbone of industrial automation and safety.

Two-Wire Signal Transmission:

• Utilizes 4-20mA DC control loops to transmit sensor signals over long distances with negligible loss.
• Requires only two wires for signal transmission and power supply, reducing installation costs.

24V DC Power Supply:

• Operates on a standard 24V DC power supply, with compatibility for other voltages such as 12V, 15V, and 36V DC.

Proportional Current Output:

• Represents 0% sensor input as 4mA and 100% input as 20mA, ensuring standardized signal interpretation across devices.
• Acts as a variable resistor, adjusting loop current based on sensor input.

Noise and Resistance Immunity:

• Unaffected by electrical noise and changes in lead wire resistance, even in challenging industrial environments.

Advantages of a 4-20mA Current Loop

• Cost Efficiency: Requires only two wires for power and signal, reducing installation and material costs.
• Reliability: Maintains signal integrity over long distances, unaffected by electrical noise or temperature-induced resistance changes.
• Standardized Interface: Ensures compatibility with a wide range of control systems like PLCs, DCS, and actuator systems.

• Chemical Plants: To regulate gas concentrations for safe and efficient processes.
• Oil & Gas: For monitoring hazardous gases and ensuring safety compliance.
• Power Plants: To maintain operational efficiency by monitoring critical gas levels.
• Pharmaceuticals: To control gas flows in precision-sensitive environments.
• Warehousing of Hazardous Materials: Prevents accidents caused by gas leaks or vapour emissions.

Installation & Maintenance Guidelines:

Proper Installation Steps:

• Ensure the apparatus is classified correctly for the operational area and temperature.
• Use appropriate cable types and gland terminations.
• Verify all electrical connections, earthing, and gaskets are secure and intact.

Inspection Checklist:

• Apparatus matches area classification and temperature.
• Electrical connections are tight and secure.
• Cable entries are sealed to maintain enclosure integrity.
• Periodically inspect for corrosion, rust, or damage to enclosures and connections.