The Model 1000RS
AMI has provided yet another break through for portable trace oxygen analysis. The patented cellblock technology and abundance of standard electronics features have resulted in a state-of-the-art package.

The Model 1000RS utilizes our innovative patented cellblock technology that eliminates the need for the traditional, individual sample system components that are typically pieced together using tubing, compression fittings, valves and flow meters.

Our approach begins with a compact solid metallic block, which undergoes a complex machining process, followed with corrosion-resistant nickel plating. The block contains a series of internal drilled gas passages, replacing external tubing and compression fittings.

The process includes sophisticated machined ports that accommodate a fine metering valve, 4-way selector valve, an oxygen sensor and flow meter, keeping all components integral to the block.

The unique 4-way selector valve offers many distinct advantages:

  • It opens or closes both the sample gas inlet and exhaust ports simultaneously with a simple 90° rotation.
  • In the "OFF" position the sensor is completely sealed from the outside air (20.9% oxygen) during long distance travels between measurement sites, increasing sensor life and responsiveness.
  • The "OFF" position also acts as a sample gas bypass, further protecting the sensor from exposure to high oxygen levels during the initial connection from the sample point to the analyzer.
  • After making a simple gas connection and using the purge feature simply rotate the selector valve 90° which opens both the "Sample Gas In" and "Exhaust" ports simultaneously, and watch how fast the Model 1000RS responds.
  • No more confusing quick disconnect logic.

AMI guarantees
higher quality and exceptional services
at a lower price.

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When the application requires, we can provide one of our patent-pending H2S resistant oxygen sensors (up to 500ppm H2S exposure for its warranted life) to meet your needs. This break through sensor technology eliminates the need for maintenance intensive H2S scrubbers.

The 1000RS has been designed for intrinsically safe use in flammable gases and is equipped with numerous standard electronic features listed below:

  • State-of-art microprocessor based electronics.
  • High-resolution single range LCD immediately reads from 0.01ppm to 25% without range changing delays or the need for manual adjustments.
  • Data logger: logs data for 15 days at 1min intervals, 30 days at 2min intervals, etc.
  • 0-1VDC analog output.
  • 10-user selectable analog output ranges: 0-10ppm, 0-50ppm, 0- 100ppm, 0-500ppm, 0-1000ppm, 0-.500%, 0-1%, 0-5%, 0- 10% and an air calibration range of 0-25%
  • Complete security feature: front panel settings will not respond to unwanted tampering if the security feature has been initiated via laptop computer.
  • Rechargeable NiCad batteries: operates for 180hours continuously.
  • Low Battery indicator.
  • Built in trouble shooting diagnostics.

The front panel sensor access makes sensor installation or replacement quick and easy. It also allows for a rapid, accurate calibration using ambient air (20.9%) if desired without the need for span gas. For those who wish to use certified span gas, simply connect the span gas to the sample gas port, briefly purge using the 4-way selector valve, rotate the selector valve 90° to the "Open" position; the reading will rapidly stabilize and you use the intuitive front panel interface to instantly adjust the reading.

No other portable trace O2 analyzer on the market compares in the areas of: accuracy, reliability, response time, ease of use, desirable features, compact size, and low cost.

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  • Area classification:
    Designed for Intrinsic safety: Class 1, Group 1, Groups C,D.
  • Display:
    High resolution single range 3 ½ digit LCD.
  • Data Logger: 15 days at 1min intervals, 30 days at 2min intervals.
  • Standard user selectable analog
    output ranges    :
    0-10ppm, 0-50ppm, 0-100ppm,
    0-500ppm, 0-1000ppm, 0-5000ppm, 0-1%, 0-5%, 0-10%, and a calibration range of 0-25%.
  • Isolated output signal: 0-1VDC.
  • Rechargeable NiCad batteries:
    180hrs continuous.
  • Inlet gas pressure: 0.5- 120psig.
  • Repeatability:
    ±1% of full scale at constant temperature (on 10ppm output range the repeatability is ±3% of scale).

  • Operating temperature range:
    32-115°F.
  • Diurnal temperature specification:
    32-115°F, < ±3 of scale.
  • 90% Upscale Response times:
    100ppm-25% less than 10 sec
    0-10ppm less than 25 sec
    0-5ppm less than 50 sec.
  • Power requirements:
    Battery charger 115/220VAC <3 Watts.
  • Dimensions: 4.5"W x 9.5"H x 4.5"D.
  • Weight: 5 lbs.
  • Sensor access:
    Easy, direct front panel access.
  • Sample connections:
    316 Stainless steel ¼" compression/quick disconnect.


  • Pelican carrying case with die cut foam inserts.
  • Flexible non-diffusive tubing.
  • Liquid rejection probe.
  • Demister.

  • Designed for Intrinsically Safe applications.
  • Single range 3 ½ digit LCD.
  • Simple, intuitive user interface.
  • Data logger.
  • Isolated output: 0-1VDC.
  • 10-User selectable analog output ranges.
  • Low battery indicator.
  • Rechargeable NiCad batteries.
  • Three user selectable levels of security settings.
  • Complete sample system: metering valve, flow meter, and 4-way gas valve.
  • Patent cellblock technology.
  • Direct, easy front-panel sensor access
  • Compact size.
  • 2-Year warranty (excluding sensor).
  • No calibration or support gases necessary.
  • Virtually unaffected by hydrocarbons and other oxidizable gases.
  • RFI protected.
  • Unaffected by change in flow rate
    (0.1-5.0 SCFH).