XGA301

Industrial Gas Analyzer


The XGA301 Industrial gas analyzer from Michell Instruments provides a convenient platform to measure oxygen, dew point and other gases such as CO2, CO and CH4. The analyzer can be supplied in one of two bench-mounted chassis and with up to three sensors fitted.

Standard features include two fully-programmable alarm circuits (voltage-free contacts), programmable analog outputs, RS232 communications and complete Windows-based data-logging software.

The industrial zirconia oxygen sensor provides fast and accurate oxygen analysis over the range of 1 ppm to 30%* O2 and delivers stable and repeatable readings, with a typical response time of less than 5 seconds for a 90% response to a step change in gas compositions. The zirconia sensor is heated, and temperature-controlled to enable oxygen ions to conduct. An internal pressure sensor compensates for small changes in the gas pressure to maintain accurate and stable readings. An optional, variable speed-pump draws a gas sample at a flow rate set by the user between 0 to 1.2 Nl/min.

The Easidew Sensor is available for dew points down to –100°C in combination with another sensor within the XGA301A2’s chassis.

*Analyzer is not suitable for enriched oxygen.

Product Features

  • Sensor choices from zirconia, galvanic electrochemical, infrared and ceramic impedance technologies
  • Variable speed pump (optional)
  • Zirconia sensor cleaning facility which can be operated at any time during use
  • Intuitive HMI with back-lit display
  • Two fully-programmable alarms
  • 2 x voltage outputs and 2 x 4–20 mA outputs
  • Digital RS232 output
  • Software package includes live graphing and Excel™ compatible data-logging
  • Password protection
XGA301A1

XGA301A2

Technical Specification

Monitor
Operating temperature +5 to +35°C
Warm-up time 3 to 4 minutes @ +20°C
Maximum inlet temperature +50°C
Sample flow rate 0 to 1.2 Nl/min, user-selectable with pump
Maximum inlet pressure 1 barg
DisplayXGA301A1/A2:16 x 2 character (9mm) back-lit LCDM
XGA301A3:20 x 4 character (9mm) back-lit LCD
Sample connectionsStandard 4mm ID / 6mm OD nipple — gas fittings on front panel
Optional: Rectus™ or Swagelok® 6mm fittings, rear panel fittings for XGA301A1 only
Dimensions XGA301A1: 250mm x 263mm x 150mm
Panel-mount XGA301:4U - 177 x 300mm (H x W)
XGA301A2/A3: 350mm x 263mm x 150mm
Weight XGA301A1: 3.5kg
XGA301A2/A3: 4 to 5.5kg
Electrical Specifications
Analog outputs 2x 4-20mA outputs, assignable to any of the fitted sensors
2x alarm relays
2 x 0–10 V (XGA301A1 only)
2 x 0–5 V (XGA301A2/A3 only)
Digital output RS232 ASCII
Power supply 90–260 V AC, 50/60 Hz
Moisture and Pressure Sensors
Sensor Type Water Dew Point* Pressure (2m lead), remote sensor
Accuracy ±2°Cdp of reading <±0.25% of full scale standard, enhanced accuracy of 0.1% and 0.05% available at extra cost
Ranges -65 to +20°Cdp
-100 to +20°Cdp
0-5 barg
0-10 barg

*for full specifications, see the Easidew Transmitter datasheet

Senosor Options and Specification

Sensor Type Zirconia Electrochemical Infrared
Measurand O2 O2 O2
(Low range)
CO CO
(H2 present)
CO2 CH4 CO
Accuracy ±1% of reading (logarithmic scale) or 0.5ppm whichever is greater. ±1% of full scale at 25°C 1013mbar ±2% of full scale at 25°C 1013mbar ±2% of full scale at 25°C 1013mbar
Inlet Pressure 1barg max 0.7 – 1.4bara 0.7 – 1.4bara
Response Time Approx 5 seconds for a 90% step change (gas flow rate of 1 Nl/ min-1) Approximately 30 seconds (T90) Approximately 30 seconds (T90)
Stablility ±2% of reading per month ±2% of range (over 12 months)
Life Expectancy >17,500 hours ~10yrs ~10yrs
0-100%
0-30%
Output can be user configured 0-10ppm, up to 0-30%
0-10%
0-5%
0-3%
0-1%
0-5000ppm
0-2000ppm
0-1000ppm
0-500ppm

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