Quantek Instruments, Inc.
183 Magill Drive
Grafton, MA 01519
Model 902D O2 / CO2 Headspace Analyzer
EASY SAMPLING & ANALYSIS
The Model 902D analyzer sample probe is tipped with a particulate filter and luer fit syringe needle with side-port holes to prevent plugging. When the pump is activated, sample is drawn through the probe and tubing and then to the oxygen sensor.
The pump is electronically timed to draw in the precise amount of sample required for the analysis, and then turns itself off after the pre-set sampling time (5 to 10 seconds). The O2 and CO2 concentration is read on the display within 20-25 seconds.
ABOUT THE SENSORS
The solid-state infrared CO2 sensor has no moving parts, a compact optical cell, and microprocessor-based calibration factors using a 6th order polynomial equation and 32 bit processor to linearize the full range measurement up to 100%.
Both sensors are unaffected by high levels of background gases such as nitrogen.
The expected life of the CO2 sensor is theoretically unlimited, as it contains no moving parts.
The expected electrochemical O2 sensor life is typically 5 years, unlike other analyzers with an electrochemical sensor that last 1-2 years.
ABOUT THE PUMP
The rugged miniature diaphragm pump has electronically controlled timing function to operate only when sampling. It provides high flow rate and long operating life.
The pump is electronically timed to draw in the amount of sample required for the analysis, and then turns itself off after the pre-set sampling time (5 to 10 seconds).
OPTIONAL RECHARGEABLE BATTERY
If equipped with the optional battery, the 902D can within transported to your facility to conduct testing with no AC outlet available. Totally sealed, long-life battery (optional) accepts full or partial charging cycle. Charger module plugs into standard 115V outlet for charging or continuous operation, though it can accept 100-240V for worldwide use.
MICROPROCESSOR/ELECTRONICS
Micro-processor based electronics provide sensor signal processing, battery charging, pump timing and on/off control for high accuracy and reliability with minimal component use and reduced size and cost.
Specifications
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Carbon Dioxide Sensor Type
Solid-state Infrared
Accuracy - Carbon Dioxide
Accuracy (for 0-100% range) ± 1% of reading, or ± 0.2% CO2 (whichever is greater), Accuracy (for 0-20% range) ± 1% of reading or ± 0.1% CO2 (whichever is greater)
CO2 Minimum Detection Limit
0.1% (0-100% range) or 0.01% (0-20% range)
CO2 Calibration Controls
Potentiometer SPAN adjustment for CO2.
CO2 Calibration Frequency
Every 12 months; calibration gas recommended.
Expected Lifetime (oxygen)
4-5 years
Oxygen Range
0.0 to 100%
Oxygen Sensitivity
0.1% O2
O2 Resolution
0.1% O2 (optional .01%)
Analog Output
Not Available
Accuracy
: +/- 1% of reading; +/- 0.1% absolute below 10.0%
Drift
less than 0.4% per year
Oxygen Sensor Type
Proprietary Electrochemical
Response Time
25 seconds to T95
O2 Sensor Lifetime
4-5 Years
O2 Sensor Body
ABS Resin
Sample Connection
Sample Probe
Sample Method
Pump
Sample Pump
Miniature diaphragm type with ~5cc/sec flow
Pump Timing
2-12 second adjustable pump time, potentiometer on back of analyzer
Minimum Sample Required
15cc
Sampling Assembly
Probe with female luer connection for filter and needle, low volume PTFE tubing
Oxygen Calibration Controls
SPAN adjustment, zero adjustment
Instrument Calibration
Calibrates with room air; coarse SPAN adjustment on back; fine span adjustment on side; ZERO adjustment on side (calibration gas recommended for CO2)
Exhaust port
Vents to air
Power Supply
100-240V (50-60Hz) Charger included, with US or international interchangeable plug adapter (upon request)
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