Posted in | Gas Analyzer

Measuring Ultra-High Purity Gases - Oxygen Analyzers

Based on the established and long-life Pico-Ion oxygen sensors, the PI2 range of trace oxygen analyzers delivers accurate and consistent measurements of oxygen down to low parts per trillion. Low cost of ownership as a result of the minimal maintenance of this high-performance oxygen analyzer makes the measurement of oxygen down to ppt level simple and economical for customers with tight budgets.

  • User-friendly and easy to work and maintain
  • Measuring trace O2 in ultra-pure Ar, He. H2, and N2
  • LDL to less than 100 ppt
  • Fast recovery from process upsets
  • Low cost of ownership
  • Integrated bypass sample system as standard
  • Optional auto-calibration system with true zero feature via the O2 scrubber

The Oxygen Analyzers for Ultra-High Purity Gases use Analytical Industries' electrochemical sensors.

Technical Specifications

PI2-MS 1000 PI2-MS 500 PI2-UHP 100 PI2-UHP 50
Measurement range 0-1, 0-10, 0-100, 0-1000 ppm 0-0.5, 0-1, 0-10, 0-100, 0-1000 ppm 0-100 ppb, 0-1, 0-10, 0-100 ppm 0-50, 0-100 ppb, 0-1, 0-10 ppm
Accuracy at constant conditions < 3% of reading or ±5 ppb (whichever is greater) ±3% of reading or ±0.5 ppb (whichever is greater)
Response time T90 <15 seconds
Sensitivity (LDL) < 5 ppb < 2.5 ppb < 250 ppt < 100 ppt
Linearity < 1% of scale
Sensor GPR-12-2000 MS-2 GPR-12-2000 MS-2E GPR-13-2000 UHP-2 GPR-13-2000 UHP-2E
Sensor life at 25 °C (77 °F) and 1 atm 12 months
(Up to 24 months for the MS versions)
Calibration interval 30 days
Inlet pressure 1.4-3.4 barg (20-50 psig) with atmospheric vent, max 10.3 barg (150 psig)
Flow rate 0.5 - 1.0 l/m (1-2 SCFH)
Gas connections 1/4" compression tube fittings
Option: 1/8" or NPT fittings
Inlets: 1/4" face seal fittings;
Vent and pneumatic valves: 1/4" compression tube fittings
Wetted parts Stainless Steel
Display Graphical LCD 12 x 7 cm (5 x 2.75”); resolution 0.1
Enclosure Bench top, painted sheet metal (35 x 25 x 34 cm (13.9” x 9.9” x 13.4”))
Options: panel or 19” rack mount, wall mount (30.5 x 30.5 x 20.3 cm (12” x 12” x 8”)) Bench top Options: panel or 19” rack mounting
Compensation Barometric pressure and temperature; heated sample system and sensor housing
Signal output 4-20 mA isolated, 0-1V and 0-5V
Range ID 1-5V DC or 4-20 mA, optional relay contacts
Communications Choice of USB, RS232
Alarms 2-off user-adjustable alarms form C relay contacts non-latching
Operating temperature 0 ° to 45 °C (32 °F to 113 °F)
Power 100-240 V AC

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