Sigma4000 Multipoint Stream Selector

Sigma4000 Multipoint Stream Selector 2000 Screen Displays

Proper monitoring of the purity of the process gases which feed semiconductor manufacturing equipment and processes requires monitoring at multiple sample points. However, placing individual gas purity analyzers at all these sample points can be very expensive.

Sigma4000 multipoint stream selectors from Trace Analytical can dramatically reduce the cost of ultra high purity (UHP) gas monitoring. By multiplexing several sampling points to a single ta3000 or ta5000 process gas analyzer, a gas manager can ensure that UHP quality product is supplied to process tools without dedicating an instrument to each gas stream. Controlled by the gas chromatograph, a Sigma4000 stream selector can poll several gas streams in sequence, or can be programmed to switch between the inlets and outlets of large scale purifiers to verify their performance.

Sigma4000 multipoint stream selectors improve the confidence in your gas supply by making it practical to monitor impurities such as H2, CO, CO2, CH4 and THC's in all of your most critical gas streams.


  • Four sample inlets, two cal. gas inlets
  • ¼-inch VCR gas ports
  • UHP shut-off valves
  • Rapid sequencing between gas steams
  • Orbitally-welded and vacuum brazed joints

  • Specifications +

    Gas Inlets
    Sigma4000 4 samples, ¼-inch face seal fitting, female, S.S.
    Zero gas, Span gas ¼-inch face seal fitting, female, S.S.
    Purge gas ¼-inch face seal fitting, female, S.S.
    Sample Requirements
    Supply Pressure 15 to 40 psig (1.03 to 2.76 bar)
    Continuous Flow 0.35 L/min. N2 @ 15 psig (1.03 bar)
    Gas Outlets
    Selected stream outlet 1/16-inch compression fitting
    Sample vent ¼-inch face seal fitting, female, S.S.
    Purge vent ¼-inch face seal fitting, female, S.S.
    Front Panel Stream ID number
    Pressure, selected stream

    115 VAC / 50 - 60 Hz,

    230 VAC / 50 - 60 Hz, or

    100 VAC / 50 - 60 Hz

    Operating current 3 amps, max.
    Materials of Construction
    Manifold Orbitally welded UHP branch valves; <1x10-9 cc-atm/sec He leak rate
    Sample Inlets Orbitally welded EP tubing
    Control/Communication Serial RS-232 communication link from ta3000/ta5000/ta7000
    Sequencer program to stream selector. Stream ID number and
    data reported to optional host computer by ta3000/ta5000/
    Dimensions Sigma4000 5.2” H x 16.8” W x 18” D (133 cm x 427 cm x 457 cm)
    Weight Sigma4000
    Net 38.0 lb (17.3 kg)
    Shipping 41.5 lb (18.9 kg)
  • Documents +