Oxygen analyzer Gasboard-9300

monitoringprocessfor hazardous environments

Overview
Gasboard-9300 is an online TDLAS process oxygen analyzer for continuous monitoring in reactors, centrifuges and other oxygen-sensitive equipment where maintaining defined O2 levels is critical for safety and product quality. It provides selective oxygen measurement with minimal cross-interference and stable long-term performance under complex gas compositions.

Safety and process compatibility
The instrument integrates a corrosion-resistant pre-treatment module compatible with acids, alkalis and organic solvents. The certified explosion-proof enclosure (Ex db IIC T6 Gb) allows safe installation in Zone 1 and Zone 2 hazardous areas, ensuring reliable operation in corrosive and solvent-vapor environments.

Control and integration
Built-in automatic interlock functions include alarm outputs and nitrogen purge control to support inerting systems and prompt protective actions when O2 exceeds set thresholds. Standard RS-485 with Modbus RTU enables PLC/DCS integration; RS-232 is available as an option. Power supply options: 24 VDC or 220 VAC.

Key Features

• TDLAS measurement principle for selective, fast-response O2 detection
• Measurement ranges: 0–5% and 0–25% O2
• Fast response (T90 <20 s) and high repeatability
• Automatic interlock, alarm output and nitrogen purge control
• Explosion-proof design (Ex db IIC T6 Gb) for hazardous areas
• Corrosion-resistant pre-treatment compatible with acids, alkalis and organic solvents
• Low maintenance requirements and long service life

Technical specifications

• Measurement principle: TDLAS (Tunable Diode Laser Absorption Spectroscopy)
• Measurement range: 0–5%, 0–25% O2
• Accuracy: ≤±2% F.S.
• Repeatability: ≤±1% F.S.
• Linearity error: ≤±2% F.S.
• Resolution: 0.1% or 0.01% (range-dependent)
• Response time T90: <20 s
• Explosion protection: Ex db IIC T6 Gb
• Operating temperature: -20 to 50 °C
• Operating humidity: 0–98% RH (non-condensing)
• Outputs: RS-485 (standard), RS-232 (optional), Modbus RTU
• Power supply: 24 VDC or 220 VAC
• Pre-treatment: Corrosion-resistant module compatible with acids, alkalis and organic solvents