Target gases: N2O, CO2, NH3, CH4, H2O, and others

Measurement units: ppb and µg/m³

Lower detection limit: ≤20 ppb | T90 response: ≤10 s

The SY-2000EX is an explosion-proof trace gas analyzer based on photoacoustic spectroscopy. It provides trace-level gas measurement with no zero drift, high accuracy, and strong resistance to background noise. The analyzer is suitable for dusty, humid, and other demanding industrial environments.

Dimensions are shown in millimetres.

• Continuous innovation and improvement in trace-level gas measurement technology.
• New measurement methods are required to meet industry standards and energy-saving and emission-reduction goals.
• Lower equipment procurement and operating costs.
• Growing demand for compact, lightweight instruments for distributed deployment and safer production.

• Automated analysis of target gas concentrations.
• Large LCD with clear numerical display, rich information, and automatic screen protection.
• Chinese and English touchscreen menu operation.
• Selectable intermediate measurement ranges.
• 4-20 mA current-loop output.
• Eight-channel switching output through relays.

• No zero drift, high accuracy, and no background noise interference.
• Suitable for gas measurement in high-dust and high-humidity environments.
• Intelligent digital processing with high automation and simple operation.

Additional specifications: accuracy ±1%; ambient temperature 0-50°C; calibration is generally not required and depends on the application.

Each gas has a unique absorption wavelength, often described as its spectral fingerprint. This characteristic can be used to identify the gas. In photoacoustic spectroscopy, a laser modulated at a selected acoustic frequency irradiates the gas. Gas molecules absorb the laser energy and release heat, causing periodic expansion and contraction of the gas. The resulting pressure wave is detected as sound and converted into a concentration measurement.

Representative molecular absorption wavelengths

Comparison of mid-infrared and near-infrared absorption intensity for ammonia

• Ammonia concentration analysis in fertilizer synthesis processes.
• Natural gas pipeline concentration analysis.
• Hydrogen quality monitoring for new-energy applications.
• Greenhouse gas monitoring.
• High-temperature blast-furnace gas analysis in steel plants.
• Process gas concentration analysis in the petrochemical industry.