TSA-100 Total Sulfur Gas Analyzer
  • TSA-100 Total Sulfur Gas Analyzer

Monitoring Total Sulfur in Gas with the TSA-100

The TSA-100 uses the pyrolysis method: all sulfur compounds in the process sample gas are oxidized and measured as the resultant SO2 concentration in the optical flow cell. The optical measurement is performed using a UV-Vis spectrophotometer.

Note: The TSA-100 is a complex instrument recommended only for gas applications where the process contains (1) more than 4 unique sulfur compounds and/or (2) unknown/exotic sulfur compounds. The OMA-300 Total Sulfur Direct is a highly effective solution for measuring up to 5 unique sulfur compounds' concentrations simultaneously, can be used for liquid process streams, and is much less expensive to implement than a pyrolysis-based instrument.


Rapid, continuous measurement  Using solid state optical technology  Learn More
Ideal for unknown/exotic sulfur compounds  All sulfur pyrolyzed to SO2 for straightforward UV measurement
Industry standard I/O  4-20mA analog outputs standard; various options available
Simple graphical interface  Proprietary ECLIPSE™ software provides intuitive utilities  Learn More


Request Pricing

Ask an Engineer
Call Us: (212) 837-7950

Find a Distributor

Sample Pyrolysis

The TSA-100G sample conditioning system is designed primarily for controlled combustion of the sample.

Upon entering the TSA-100G, the sample is split via tee into a bypass loop and a sample loop. In the sample loop, two mass flow controllers are used to accurately mix the sample with air, ensuring an optimal air/fuel ratio for combustion.

The sample/air mixture flows through a pyrolysis furnace, where all present sulfur compounds are converted to sulfur dioxide. The fully oxidized sample then enters the measurement flow cell where SO2 absorbance is monitored (via fiber optic cables). Finally, the sample exits the system as waste.

Total Sulfur Measurement Applications

The total sulfur measurement is required in many processes across various industries. Common petrochemical applications are detailed below.

Total Sulfur in Natural Gas

Sulfur compounds--particularly hydrogen sulfide--in natural gas carry with them a host of problems and considerations for both producer and consumer. Sulfur content is known to:

  • Cause pipeline corrosion, jeopardizing distribution networks and necessitating complex maintenance regimens
  • Officially reduce the quality of sales gas; natural gas quality assurance involves monitoring of sulfur content, e.g. at custody transfer points
  • Contribute directly to SO2 emissions from gas-burning plants; SO2 is a widely regulated pollutant and a necessary concern for avoiding fines and fulfilling social responsibility
  • Introduce unpleasant odors to gas-dependent industrial and domestic environments; mercaptans are added to natural gas to make leaks noticeable by smell, but uncontrolled sulfur content turns the odor from useful to intolerable

Avoiding these chronic sulfur-related issues requires reliable online monitoring of total sulfur load in gaseous hydrocarbon streams. The only way to verify the efficiency of sulfur removal processes and ensure satisfaction of customer and environmental needs is to proactively analyze stream composition.

The TSA-100 is a fully integrated monitoring solution driven by UV-Vis diode array detection. This solid state instrument is a much more practical than the consumable-laden designs that have historically dominated the market.

Need to measure H2S in natural gas?

TSA-100 Technical Specifications

Subject to modifications. Specified product characteristics and technical data do not serve as guarantee declarations.

General Specifications
Measurement Technology nova-II™ UV-VIS diode array spectrometer
Light Source Pulsed xenon lamp (~5 year lifespan); deuterium and tungsten sources available
Methodology Controlled oxidation of sample sulfur to SO2 via pyrolysis (R-S + R-H + O2 > SO2 + CO2 + H2O) and measurement of resultant SO2 concentration, correlated directly to total sulfur concentration
Sample/Analyzer Interface Flow cell (various materials and path lengths available)
Sampling System Custom design per application
Photometric Accuracy ±0.004 AU
Application Accuracy Dependent upon application. Inquire with Sales.
Calibration Calibrated at factory or site with certified calibration fluid
Ambient Temperature Standard: 0 to 35 °C (32 to 95 °F)
To avoid radiational heating, use of a sunshade is recommended for systems installed in direct sunlight.
Electrical Requirements Analyzer: 85 to 264 VAC 47 to 63 Hz
Power Consumption Analyzer: 45 Watts
Environment Indoor/Outdoor — no shelter required
Standard Outputs 1 galvanically isolated 4-20mA output per measurement
2 digital outputs for fault and SCS control
Optional Outputs Modbus TCP/IP; RS-232; RS-485; Fieldbus; Profibus; HART; more
Weight Analyzer: 32 lbs. (15 kg)
Size Analyzer: 24" H x 20" W x 8" D (610 x 508 x 203 mm)
Enclosure Standard: wall-mounted carbon steel NEMA 4 enclosure


Data Sheet – TSA-100 Total Sulfur Gas Analyzer
English – pdf