Gas Concentration Analyzer for Hydrogen Sulfide (H2S)
Gas Concentration Analyzer for Hydrogen Sulfide (H2S)
AMC Monitoring for Inorganic Gases
AMC Monitoring for Inorganic Gases

The Picarro SI2104 gas concentration analyzer delivers ultra-precise, parts-per-billion (ppb) measurements of hydrogen sulfide (H2S) in a reliable, easy-to-use, compact design. The SI2104 can be commissioned and operating within minutes, requires no field calibration or consumables, and can operate for months without user interaction.
- Real-time AMC monitoring in cleanrooms, FOUP and fab equipment
- Fast, continuous analysis in seconds
- Virtually no downtime or consumables cost
- Free of interference from common fab chemicals
- Extreme accuracy for event confirmation
- No field calibration required
Gas Detected | Hydrogen Sulfide (H2S) |
---|---|
Precision (1σ) | ≤1.5 ppb (10 sec), ≤0.5 ppb (100 sec) |
Lower Detectable Limit (3σ) | 1 ppb (100 sec) |
Method Detection Limit (per Semi C10-1109) | 3 ppb |
Linearity (per IEC 61207) | ±1% |
Accuracy at span | ±5% @ full scale |
Accuracy at zero | ±2 ppb |
Instrument-to-Instrument Consistency | ±5% @ full scale ±2 ppb @ zero |
Measurement Range | 0-10 ppm |
Measurement Interval* | <4 seconds |
Sample Flow Rate | ~0.4 slm |
Combined Response Times (T90/10 + T10/90) @ 20 ppb | <20 seconds (100 ppb challenge) |
Fall Times T90/10 @ 20 ppb | <10 seconds (100 ppb challenge) |
*-Measurement interval at span may increase as much as 2x above listed values.
Measurement Technique | Cavity Ring-Down Spectroscopy |
---|---|
Calibration Period Recommendation | Calibration not required - Initial validation at 6 months, then every 12 months thereafter |
Time Required to Perform Validation | Estimated at <15 minutes per manufacturer's instructions |
Measurement Cell Temperature Control | ±0.005°C |
Measurement Cell Pressure Control | ±0.0002 atm |
Operating Temperature | 15 to 35°C (operating); -10 to 50°C (storage) |
Ambient Humidity | <99% RH non-condensing |
Accessories | Pump (external, included), keyboard (included), mouse (included), LCD monitor (optional), Maintenance Kit (optional) |
Communication Interfaces | RS-232, Ethernet, USB, analog 0–10 V, Modbus, 4-20mA (optional) |
Sample Inlet Connection | 1/4" Stainless Steel Swagelok® Tube Fitting (recommended 1/4" OD PFA Tubing) |
Dimensions | Analyzer: 17" w × 8.38" h x 24.4" d (43.2 × 21.3 × 62 cm) |
Weight | 73 lbs. (33.18 kg) including external pump |
Power Requirements | 100–240 VAC, 47–63 Hz (auto-sensing), <400 W (total): 250 W (analyzer), 150 W (pump) at steady state |
Warranty | 12 months |
Certifications | CE conformance |
Country of Manufacture | USA |
Components/Parts | Actions | Frequency |
---|---|---|
Particulate filter | Replace | Every 6 months |
Measurement Validation | Proxy validation | Every 12 months |
Pump | Rebuild (diaphragm) | Preventive maintenance every 2 years |
Fan assemblies | Replace | Preventive maintenance every 2 years |
External Pump | Replace | Every 5 years |