Types of Gas Analyzers
1. Gas Analyzers - NDIR / UV DOAS
2. Laser Gas Analyzers - BAsed on TDLAS
3. VOC Analyzer - Based on PID
4. VOC / TOC / THC Analyzer - Based on FID
Gas Analyzers - For Stack Emission - NDIR / UV DOAS
The gas analyzers employ NDIR/UV DOAS technology to enable concurrent and uninterrupted measurement of the concentration of up to five gases. These analyzers exhibit outstanding long-term stability, a compact form factor, and straight-forward operation. The sensors, characterized by low impedance, demonstrate superiornoise resistance. Moreover, as they lack movable parts, they are immune to vibration and exhibit remarkable resilience to moisture interference.
Sample Handling & Conditioning System
- Hot & Wet Extraction: Sample is extracted from the stack using heated sample probe, trasnfered to the sanalyzer using heatrace line to avoid condensation. Further sample is cooled and moisture is removed before analyzing.
- Cold & Dry Extraction: Sample is extracted, cooled, moisture removed at the sampling point itself and transported to the analyzer using simple PTFE line.
Technical Specification
| Measuring Principle | NDIR/UV DOAS/NDUV/ZIRCONIA |
| Measureable Gases | SO₂, NOx, CO, CO₂, CH₄, O₂, & more |
| Measureable Range | 0~1000PPM (other range of request) |
| Linearity | ±1% F.S. |
| Zero Drift | ±1% ~ ±2% F.S./Week |
| Span Drift | ±1% ~ ±2% F.S./Week |
| Response Time | Within 60 sec (90% response from gas inlet) varies depending on the components to be measured and the measurement range |
| Display | LCD with Backlight/Color Touch Screen |
| Power | 230VAC, 50Hz |
Laser Gas Analyzers - Based on TDLAS ((Tunable Diode Laser Absorption Spectroscopy)
The EZ320-Series represents a 19" mountable, tunable laser gas analyzer designed for industrial online analysis and environmental monitoring applications. Utilizing Tunable Diode Laser Absorption Spectroscopy (TDLAS) technology, these analyzers employ a multiple reflection long optical path, enabling the precise analysis of various gases such as HCI, CI2, O2, NH3, H2S, CO2, CH4, H2O, and HF. The configuration of reflected light can be customized to meet specific operational requirements.
The system seamlessly integrates a transmitter, receiver, and gas cell within a compact 1U chassis, facilitating convenient mounting in a standard 19" rack. The sample gas undergoes filtration through a dedicated probe filter. Within the gas cell, the gas is subjected to laser emissions from the transmitter. Subsequently, the receiver processes the received spectrum to precisely calculate the gas concentration.
Technical Specification
| SPECIFICATION | |
|---|---|
| Measurable Gases | HCl, HF, NH₃, CH₄, Cl₂, O₂, H₂S, CO₂, H₂O |
| Linearity & Repeatability | ≤±1% F.S. |
| Zero & Span Drift | ≤±1% F.S./Half Year |
| Maintenance & Cal. Cycle | ≤2 Times/Year |
| Output | RS485 Modbus RTU, 4–20mA (Optional) |
| Relay Output | 4 (Max. Load: 10A, 250VAC & 30VDC) |
| Cleaning | Oil & Moisture Free Air |
| Output | RS485 & 4–20mA (Optional) |
VOC Analyzer (Photoionization Detection)
EZ320 PID, Continuous Emission Monitoring System uses Photoionization (PID) principle for gas detection. The ultraviolet light generated by the UV lamp is irradiated on the target gas. The target gas is ionized after absorbing sufficient ultrviolet light energy. The concentration of the target gas is detected by measuring the current generated due to gas ionization. The system consists of sampling unit, sensor unit and the display unit. The sample gas enters the PID gas detector through suction pump. The detector transmit the processed concentration signal to the display unit.
VOC/TOC/THC Analyzer - Based On FID (Flame lonization Detection)
EZ320 VOC/TOC/THC Gas Analyzer uses Gas Chromatography (GC) combined with Flame lonization Detection (FID) for accurate measurement in gaseous samples. In this system, gas-phase organic compounds are separated by the GC column, then ionized in the FID's hydrogen flame. The ionization current generated is directly proportional to the organic carbon content.
This method provides highly sensitive and specific detection in industrial emissions, ambient air, and process gases. The system includes a sample preparation unit, GC column, FID detector, and a display unit for real-time gas monitoring.