H2S Analyzer – Model 331S
This simple design by Envent Engineering utilizes a lead acetate based detection system that provides a linear and interference-free output of the H2S or optional Total Sulfur concentration.
Features
- Fast response times using Rapid Response Algorithms (RRA)
- No interference from other components in the sample
- Low power consumption
- Extended tape life of 60-90 days
- Measures up to 5 times the calibrated range
- Interference-free Lead acetate sensor
- Quick delivery – as fast as 1 to 2 days for standard systems
- Full field service & training available
Applications
Common applications include:
- Sales Gas
- Plant Inlet
- Pipeline Monitoring & Blending
- H2S Scavenger Systems
- Wellhead Monitoring
- Acid Gas
- Fuel Gas Monitoring
- Bio Gas
Specifications
Power | 12-24 vdc @ less than 3 watts or 100-240 VAC, 50/60 HZ |
Electrical classification | Class 1, Div 2 Groups A, B, C & D certified to CSA standards. |
Ambient Temperature | 0-50 ˚C (32 to 122 F). Contact for other requirements. |
Output Ranges | Standard ranges: 0-5ppm to 0-100ppm, higher ranges without dilution available upon request. Custom ranges: < 5000ppb and up to percent level H2S. |
Response time | 20-sec alarm |
Accuracy | 1.5% of full scale, (3% for Total Sulfur or Dilution), 1.5% repeatability |
Inputs | Four digital inputs individually configurable. |
Outputs | • Dual isolated 4-20 mA (loop power required). • Modbus serial RS-232 & RS-485 (Ethernet available) • Four 5 amp SPDT alarm relays (high reading, high high reading, low tape, low pressure, low temperature, fault). • Four solid state solenoid drivers ( auto cal, total sulfur, stream switching, valve actuator) |
Displays | 128 x 64 Graphic Display Menu is scrolled by internal button |
Dimensions | 13″W x 15″H x 8″L (33.02 W x 38.1 H x 20.32 L cm) Standard system and 331S are mounted on a 24″W x 16″H x ¼” (60.96 W x 40.64 H x 0.635 L cm) thick anodized panel. |
Configuration Software | Windows® software for customer configuration, archive retrieval, and Modbus mapping. |
* | Product specifications subject to change without notice to improve reliability, function, design, or otherwise. |
Optional Equipment
SDS Dual Stream | The 330SDS Analyzer measures two streams at the same time. |
Total Sulfur | Total Sulfur furnace converts all sulfur compounds to H2S which allows the analyzer to measure Total Sulfur. |
CO2 | Dual-beam IR bench. CO2 concentration is displayed on the second line of display and can be configured as a 2-20 mA analog output. CO2 ranges from 0-20% to 0-100% |
Stream Switching | Allows switching of four (4) input streams or from H2S to Total Sulfur measurement. |
Dilution | Allows measurements up to 30% H2S using permeable membrane dilution. |
Liquid Sampling | Liquid sample system to measure H2S in Hydrocarbon liquids or water. |
Custom Systems | Envent can design custom integrated systems to meet application requirements. |
Downloads
- User Manual: 331S H2S
- 331S Data Sheet
- Total Sulfur Analyzer Manual
- Data Sheet: Dilution Probes
- Dilution System Manual
- Spare Parts Cross Reference
- H2S analyzer cleaning procedure
- Modbus communications guide
- App Note: H2S in Liquid Scavenger Treated Gas
- Tech Note: Total Sulfur Technical Note
- Applicable ASTM Standards