OxyCheq Expedition CO Analyzer w/ Alarm


Expedition Carbon Monoxide Analyzer with Alarm. Compact and fits in your hand.

This item ships for free

Available on backorder

SKU: OA-01-05 Category: Brand:


  • Range: 0-100 ppm
  • Accuracy: +/- 2 ppm
  • Alarm: Alarm sounds @ 10 ppm (+/- 1ppm)
  • Sensor: Galvanic (Replaceable)
  • Cost to Replace Sensor: ($140 MSRP)
  • Response Time: 95% @ 10 seconds (May very in extreme temperatures)
  • Sensor Expedited Life: 3.5 years (Most last 3.5 +)
  • Calibration: Only when new sensor installed
  • Power: 3 ea AAA cells (Alkaline only – User replaceable)
  • Battery Life: Varies under continuous use or for immediate sampling
  • Operating Temp: 32 degrees F to 120 Degrees F (0C to 50C)
  • Storage: 5 Degrees F to 135 Degrees F (-15C to 57C)

The Expediton CO analyzer reads in parts per million. This truly is a very small amount of CO.

The alarm will sound when the level of CO reached 10 PPM (+/- 1ppm).

Most sensors last 3.5 years to 4… we have seen up to 5 years on the sensors. In comparison, you would have to replace two oxygen sensors in an oxygen analyzer during this same time. So the cost of the CO sensor is less over the same time.

The electrolyte in the sensor tends to dry up after 3.5 years. Most sensors are not used up by the actual sampling of CO. The sensors only give off milivolts according to the amount of CO it reads. So the less CO, the longer the life of the sensor.

The OxyCheq Expediton CO analyzer ships in its own case with room for supplied nozzle and room for optional accessories such as a flow restrictor. Please note that all galvanic sensor are suseptable to humidity, temperature and pressure. We recommend a flow restrictor for increased accuracy.

The OxyCheq Expedition CO Analyzer is made in the USA, serviced and calibrated in the USA.

One year warranty on analyzer and sensor.
Does not include regulator or calibration gas.

Carbon Monoxide
What Is It?

Carbon monoxide (CO) is an odorless, colorless gas that interferes with the delivery of oxygen in the blood to the rest of the body. It is produced by the incomplete combustion of fuels.

What Are the Major Sources of CO?
Carbon monoxide is produced as a result of incomplete burning of carbon-containing fuels including coal, wood, charcoal, natural gas, and fuel oil. It can be emitted by combustion sources such as un-vented kerosene and gas space heaters, furnaces, wood stoves, gas stoves, fireplaces and water heaters, automobile exhaust from attached garages, parking areas, and tobacco smoke. Problems can arise as a result of improper installation, maintenance, or inadequate ventilation and filtration on or around compressors used for filling SCUBA tanks.
What Are the Health Effects?
Carbon monoxide interferes with the distribution of oxygen in the blood to the rest of the body. Depending on the amount inhaled, this gas can impede coordination, worsen cardiovascular conditions, and produce fatigue, headache, weakness, confusion, disorientation, nausea, and dizziness. Even low levels can cause death.

CO Analyzer Comparison
 OxyCheq Expedition CO  Analox EII CO
 Price  $400 MSRP (USD)  $355 MSRP (USD)
 Replacement Sensor  $140.00 MSRP (USD)  $240 to $250 (MSRP / Exchange rate)
 Alarm  Sounds @ 10 PPM +/-1 PPM  No Alarm
 Measurement Range  0-100 PPM  1-50 PPM
 Sensor Life  3.5 + Years  2 years
 Sensor Accuracy  +/- (1% FS + 1% value)  +/- (1% FS + 5% value)
 Sensor Drift  Less than 0.5 ppm Annually  6.0 ppm Annually
 Calibration*  When New Sensor Installed or 3.5 years.  Every time used – Prior to every dive with Bump Test
 Hydrophobic Membrane  Yes  No (None Noted)
 Bump Test Required for Calibration  No  Yes ($80 USD) Valid for only 20 Bump test (uses)
 Temperature Compensated  Yes  No (Not noted or found)
 Power  3 ea AAA  1 ea 9V
 Battery Replacement  2-3 years (Occasional Use)
1 year (Inline Compressor Use)
 1 year
 Display  3 Digits  2 Digits
 Warranty (Sensor)  1 year (prorated)  1 year (prorated)
 Hand Held  Yes  Yes
 Compressor Inline Use  Yes  No
 Continuous Use  Yes  No
 Flow Restrictor (s)  Yes (Optional / Recommended)  No (No Options)
 Purchase price  Analyzer $400 (MSRP) w/ Case
Optional Restrictor: $40.00
Total: $440.00
 Analyzer: $355.00 (MSRP) (No Case)
Bump Tester: $80.00 (20 dives)
Total: $435.00
 1 Year Expense  None  Bump Tester: $80 (20 dives)
Battery: $1.50 – $3
 2 Year Expense  Batteries $2 – $4  Sensor: $240.00
Bump Tester: $80.00 (20 dives)
Battery: $1.50 – $3
 3 Year Expense  None  Bump Tester: $80 (20 dives)
Battery: $1.50 – $3
 4 Year Expense  Sensor $140.00 (3.5 – 4 years)
Calibration: ~ $55
Batteries $2 – $4
 Sensor: $240.00
Bump Tester: $80.00 (20 dives)
Battery: $1.50 – $3
 Total Cost Over 4 years  $600.00 (w/o Flow Restrictor)
Does not include batteries ($4 – $8)
Does not include batteries ($6 – $12)






Expedition Manual (.pdf)

Sensor MSDS (.pdf)


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