EGE-Elektronik SZA400EX-24 Explosion-proof Flow Sensor Amplifier

Description

EGE-Elektronik SZA400EX-24 Explosion-proof Flow Sensor Amplifier

Product Dimensions：

The EGE-Elektronik SZA 400 EX-24 (Part No. P10708) is a high-performance flow sensor amplifier designed for use with thermal flow sensors in hazardous environments. It acts as the switching and evaluation unit for flow monitoring systems.

Product Detailed Description

The SZA 400 EX-24 is an intrinsically safe amplifier that interfaces between flow probes (typically the STS or ST series) located in explosive atmospheres and the control system. It provides the necessary power to the sensor and evaluates the signal to determine if a flow rate has exceeded or fallen below a user-defined threshold.

Technical Parameters

Product Advantages

• Explosion Protection: Engineered specifically to provide an intrinsically safe circuit for sensors operating in Zone 0 or Zone 20 environments.
• Adjustable Sensitivity: Features a built-in potentiometer that allows the user to precisely set the switching point based on the specific media and flow speed.
• Status Monitoring: Equipped with integrated LED indicators (typically red/amber/green) to provide instant visual feedback on the flow status and power supply.
• Reliable Isolation: Provides galvanic isolation between the hazardous area (sensor) and the safe area (control PLC/relay logic).

Important Considerations & Precautions

• Installation Location: The SZA 400 EX-24 amplifier itself must be installed in a safe area (non-explosive atmosphere) or inside an appropriately rated flameproof enclosure.
• Cable Separation: In compliance with ATEX/IECEx standards, the intrinsically safe wiring (to the sensor) must be kept physically separate from non-intrinsically safe power and relay wiring.
• Sensor Matching: This amplifier is designed to work with specific EGE-Elektronik thermal probes. Ensure the electrical parameters (L_i, C_i) of the sensor are compatible with the amplifier’s output (U_o, I_o).
• Power Stability: Use a stabilized 24 V DC power supply to avoid nuisance tripping or damage from voltage spikes.

Product Applications

The SZA 400 EX-24 is widely used in industries where monitoring fluid or gas flow is critical for safety and process control:

• Chemical Industry: Monitoring the flow of cooling water or chemical additives in explosive processing zones.
• Oil & Gas: Dry-run protection for pumps and flow monitoring in refinery piping systems.
• Venting Systems: Ensuring adequate airflow in exhaust hoods or ducting where flammable vapors may be present.
• Pharmaceuticals: Precision flow control in solvent-based production environments.

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