Envent Model 331S

H2S + Total Sulfur Analyzer

Certified for Class I, Div 2, Groups B, C & D.

The Model 331S H2S Analyzer utilizes field-proven, tape-based technology that provides a linear and interference-free output of H2S. An optional Total Sulfur measurement can be added to the analyzer. 

 

  • Features
    • Fast response times using Rapid Response Algorithm (RRA) ~ 20 seconds to alarm
    • No interference from other components in the sample
    • Low power consumption <3 Watts
    • Extended tape life of 60-90 days
    • Measures up to 5 times the calibrated range
    • Quick delivery on standard systems
    • Full field service and training available
  • Specifications
    Power 12-24 VDC @ less than 3 watts or 100-240 VAC, 50/60 HZ
    Electrical classification Certified for Class I, Div 2 Groups B, C, & D
    Ambient Temperature 0-50 °C (32 to 122 °F) std. Contact for other requirements.
    Output Ranges

    Standard Ranges: 0-5ppm up to 0-100ppm

    Custom Ranges Available: ppb levels and >150ppm to 30%
    Accuracy / Repeatability
    H2S:
    Accuracy Repeatability
    <0.5 ppm +/- 10% F.S.
    0.5 ppm - 1ppm +/- 5% F.S.
    1 ppm - 200ppm +/- 1.5% F.S.
    >200ppm +/- 2% F.S. [With Dilution]
    +0.5% for 2nd Sensor Measurement [SDS Models*]
    TS:
    Accuracy Repeatability
    <1 ppm +/- 10% F.S.
    1 ppm - 2ppm +/- 5% F.S.
    2 ppm - 400ppm +/- 2% F.S.
    >400ppm +/- 2.5% F.S. [With Dilution]
    +0.5% for 2nd Sensor Measurement [SDS Models*]
    *Note: SDS Models do not support ppb applications
    LDL 50ppb
    Inputs Four digital inputs individually configurable.
    Outputs Dual isolated 4-20 mA (loop powered)
    (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.
  • Downloads
  • Certification
  • Application Flexibility

    The Model 331S measures H2S and/or Total Sulfur in natural gas, petrochemical streams, condensate, liquids, or LPG. Common applications include:

    • Sales Gas
    • Plant Inlet
    • Pipeline Monitoring & Blending
    • H2S Scavenger Systems
    • Wellhead Monitoring
    • Acid Gas
    • Fuel Gas Monitoring
    • Bio Gas
  • Software

    I.C.E. (Integrated Configuration Environment) is a Windows® based program that accompanies all 330S Analyzers for full configurability.

    • Field friendly interface via front display panel
    • Easily configurable alarm processor and calculation processor
    • 3 Mb event triggered archive storage
    • Alarm/Event log
    • Customizable serial RS-232 & RS-485 mapping
    • Numerous modes of communication including 4-20mA outputs, alarm outputs, solenoid drivers, serial Modbus and Modbus TCP

     
    If you have the model 330S or 331S ICE software download below 

  • Additional Advantages
    • Customized sample conditioning system
    • Analytical Accessories: Sample Probes, Field Stations, Heated Sample Line and Enclosures
    • Analyzer Walk-in Shelters
  • Optional Equipment
    SDS Dual Stream The 331SDS Analyzer can measure 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 4-20 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 your application requirements.

Contact us to learn more about this product

Hydrogen Sulfide + Total Sulfur Analyzers

Model 330S

The Model 330S is a Class I Division 1 H2S Analyzer utilizing field proven tape based technology that provides a linear and interference-free output of H2S.

Learn More

Model 331S

The Model 331S is a Class I Division 2 H2S Analyzer utilizing field proven tape based technology that provides a linear and interference-free output of H2S.

Learn More

Model 330S-Ex

The Model 330S-Ex is an ATEX and IEC certified H2S Analyzer utilizing field proven tape based technology that provides a linear and interference-free output of H2S.

Learn More

Model 330SDS

The Model 330SDS is a Class I Division 1 H2S Analyzer providing a linear and interference-free output of H2S on two streams simultaneously.

Learn More

Model 331SDS

The Model 331SDS is a Class I Division 2 H2S Analyzer providing a linear and interference-free output of H2S on two streams simultaneously.

Learn More

Model 330SDS-Ex

The Model 330SDS-EX is an ATEX and IEC Certified H2S Analyzer providing a linear and interference-free output of H2S on two streams simultaneously.

Learn More

Sensing Tape

Envent tape is 4 times stronger than any competitive tape at no extra cost.

Learn More

Vision

Envent is committed to be a prominent global provider of analytical systems for process industries.

© 2023 Envent. All Rights Reserved. Privacy Policy Terms