• Your Personal Gas Analyzer.
  • World's first dual gas Oxygen and Carbon Monoxide analyzer and data logger.
  • Programmable via Smartphone.
  • Compatible with existing My Nitroxbuddy app.
  • Please see our cootwo support forum for more info.
  • cootwo online class.
Place cootwo in front of the tank you want to analyze (or use the BCD LP adapter for better accuracy) and see Oxygen and Carbon Monoxide content on the display or on your smartphone.
Save all your analyses for future reference. See the graphic signature of your analysis. Customize logs with images and descriptions.
Enjoy your dive with peace of mind as now you know that the gas you are breathing is safe.
Parameter cootwo cootwo DELUXE
Measurement Range (O2) 0.3 - 99.9% 0.3 - 99.9%
Measurement Range (CO) 0 - 30 ppm 0 - 30 ppm
Resolution (02) 0.1% 0.1%
Resolution (CO) (2) 0.1 ppm 0.1 ppm
Linearity (O2) (3) 1% 1%
Linearity (CO) 1% 1%
Accuracy (O2) (4) Programmable Programmable
Accuracy (CO) (5) 5% 5%
Operating Temperature 41F to 113F (5C to 45C) 41F to 113F (5C to 45C)
Operating Pressure 800 - 1100 Mbar 800 - 1100 Mbar
Analyzer Warm Up Time (4) Programmable Programmable
Sensor Response Time (O2) (6) 30 sec. 30 sec.
Sensor Response Time (CO) (6) 30 sec. 30 sec.
Calibration Gas (O2) (7) Any Any
Calibration Gas (CO) (8) 0 and 10, 15 or 20 ppm 0 and 10, 15 or 20 ppm
Sensor O2 (9) Included Included
Sensor CO Included Included
Sensor Lifetime (O2) (9) Depends on O2 sensor Depends on O2 sensor
Sensor Lifetime (CO) 24 months 24 months
Battery Autonomy (10) 3 months 3 months
Measurement System Imperial / Metric Imperial / Metric
Activation push button push button
Smartphone Interface Bluetooth 4 Low Energy Bluetooth 4 Low Energy
Identification (11) Unique MAC Address Unique MAC Address
Size 4.3x2.2x1.6" (109x55x40 mm) 4.3x2.2x1.6" (109x55x40 mm)
Weight 3.2 oz (91 g) 3.2 oz (91 g)
MSRP $299.99 $349.99
When setting CO display in high resolution mode
When using 2 point calibration with Air and pure Oxygen at constant temperature
User programmable with the My Nitroxbuddy app
When using a calibration gas with 2% accuracy
T90 value: time it takes the sensor to reach 90% of the value
To calibrate the Oxygen sensor use any gas with O2 content in the 0.5% to 100% range. For better accuracy we recommend to calibrate cootwo using the 2 point calibration method and using two gasses with O2 content close to gas that needs to be analyzed.
Calibration of the Carbon Monoxide sensor should be done at least once a year and requires the use of a smartphone and 2 gasses. Please refer to online tutorial for more details.
cootwo can operate with any of the following sensors: Analytical Industries Inc. PSR-11-39-MD, Maxtec MAX-305 and MAX-305F, Teledyne R-22S or DiveNav Nitroxbuddy O2 sensor. The estimated lifetime in air of the DiveNav Nitroxbuddy O2 sensor is 12 months.
cootwo uses a rechargeable Li-Ion battery that can be easily recharged by the user via a standard USB port.
Accessible via smartphone