Sulfur Compound Instruments
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​Model T108U

with NumaView™ Software

Trace Level Total Sulfur Analyzer



  • Ranges: 0-5 ppb to 0-20,000 ppb, user selectable
  • Dual ranges and auto ranging
  • Large, vivid, and durable color graphics display with touch screen interface
  • Ethernet, RS-232, and (optional) USB com ports
  • Front panel USB connections for peripheral devices and firmware upgrades
  • 8 analog inputs (optional)
  • Adaptive signal filtering optimizes response time
  • Temperature & pressure compensation
  • Continuous Auto Zero Correction
  • Comprehensive internal data logging with programmable averaging periods
  • Ability to log virtually any operating parameter
  • Two-year warranty​

 Maintenance & Parts


​The following table provides a list of items that  need regular maintenance to ensure your product remains in good working condition.

ItemActionFrequencyCal CheckManual Section
1Particulate filterChange particle filterWeeklyNo10.3.1
Verify test functionsReview and evaluateWeeklyNo10.2; Appendix C 
Zero/span checkEvaluate offset and slopeWeekly-- 9.3, 9.6, 9.9
1Zero/span calibrationZero and span calibrationEvery 3 months-- 9.2, 9.4, 9.5, 9.7, 9.8
1External zero air scrubber (optional)Exchange chemicalEvery 3 monthsNo10.3.3
1Perform flow checkCheck FlowEvery 6 MonthsNo10.3.7
Internal IZS Permeation TubeReplaceAnnuallyYES10.3.2
Perform pneumatic leak checkVerify Leak TightAnnually or after repairs involving pneumaticsYes10.3.6
2Pump diaphragmReplaceAnnuallyYes​Refer to diaphragm kit instructions
 Calibrate UV Lamp OutputPerform lAMP CAL Prior to zero/span calibration or PMT hardware calibration-- 5.9.6 &
3PMT sensor hardware calibrationLow-level hardware calibrationOn PMT/ preamp changes  ifYes11.7.2.8
0.7 < slope or
slope >1.3
1Sample chamber optics Clean chamber, windows and filtersAs necessaryYes11.7.2.2 &
1Critical flow orifice & sintered filtersReplaceAs necessaryYes10.3.4
1 These i​​tems are required to maintain full warranty; all other items are strongly recommended.
2 A pump rebuild kit is available from Teledyne API’s Technical Support including all instructions and required parts (refer to Appendix B for part numbers).

3 Replace desiccant bags each time the inspection plate for the sensor assembly is removed. 


07268B_T108_Addendum.pdfT108 Manual Addendum657 KB
SAL000044B - T108.pdfT108 Specification974 KB
T SERIES_6PG.BROCHURE_2018_web.pdfT Series with NumaView Brochure9567 KB
T108U_Literature_RevA.pdfT108U Specification1056 KB


Ranges Min: 0-5 ppb full scale
Max: 0-20,000 ppb full scale (selectable, dual range supported)
Measurement Units ppb, ppm, μg/m3, mg/m3 (selectable)
Zero Noise 50 ppt (RMS)
Span Noise 0.5% of reading (RMS) above 5 ppb
Lower Detectable Limit 100 ppt
Zero Drift < 0.2 ppb/24 hours
Span Drift < 0.5% of full scale/24 hours
Lag Time 30 seconds
Rise/Fall Time < 140 seconds to 95%
Linearity 1% of full scale
Precision 0.5% of reading
Sample Flow Rate 650 cc/min ±10%
Power Requirements 100V-120V, 220V-240V, 50/60 Hz
Analog Output Ranges 10V, 5V, 1V, 0.1V (selectable)
Recorder Offset ±10%
Included I/O 1 x Ethernet: 10/100Base-T
2 x RS232 (300-115,200 baud)
2 x USB device ports
8 x opto-isolated digital outputs
6 x opto-isolated digital inputs
4 x analog outputs
Optional I/O 1 x USB com port
1 x RS485
8 x analog inputs (0-10V, 12-bit)
4 x digital alarm outputs
Multidrop RS232
3 x 4 - 20mA current outputs
Operating Temperature Range 5 - 40ºC (with US EPA Equivalency)
Dimensions (HxWxD) Analyzer 7” x 17” x 23.5” (178 x 432 x 597 mm)
Converter: 7” x 17” x 22” (178 x 432 x 559)

Specifications are subject to change without notice.
All specifications are based on constant conditions.​

Analyzer: 45 lbs (20.5 kg)
Converter: 24 lbs (10.8 kg) ​​​



The Model T108U Total Sulfur analyzer is designed to measure ultra-low levels of mixed sulfur impurities, collectively referred to as Total Sulfides, in air or carbon dioxide gas.  Since there is no scrubber in the system, the instrument reading is the sum of the oxidized sulfur compounds and SO2.

The Model T108U consists of a modified Model T100U SO2 analyzer with special software and a Model 501TS high temperature thermal oxidizer.  Sulfur compounds are heated as they pass through the converter and oxidized into SO2.  When analyzing CO2, which generally contains no oxygen, approximately 6% O2 is added to the sample before entering the converter.  This dilution is corrected in the calibration procedure.

All T Series instruments offer an advanced color display, capacitive touch screen, intuitive user interface, flexible I/O, and built-in data acquisition capability.  All instrument set up, control and access to stored data and diagnostic information is available through the front panel, or via RS232, Ethernet, or USB com ports, either locally or by remote connection.

The Model T108 comes with NumaView Software. NumaView Remote PC Software allows for a remote connection with virtual interface and data downloading capability to analyzers operating NumaView Software.