Model MD300

Oxygen Analyzer​​​​
*For use above water only*



​Teledyne's expanding line of analyzers for mixed gas diving includes the MD300 handheld oxygen analyzer.

These models offer exceptional performance and reliability that users will come to appreciate. Using state-of-the-art design concepts and manufacturing techniques, the microprocessor-based MD300 Oxygen Monitor with alarms offer unique features that set these instruments apart from the competition.

With a microprocessor on board, functions such as calibration are a snap. Just turn the unit on, press the CAL key and the computer does the rest. Pressing the lock key protects the calibration setting.

The MD300 with alarms easily allows the user to save settings. This model also features Teledyne's own RS-17S oxygen sensor with enhanced temperature tracking and superior long-term stability and accuracy.


  • ​Microprocessor controlled

  • Large, easy to read, 3 1/2 digit LCD display with backlighting

  • Auto calibration and Auto diagnostics

  • Two fully adjustable alarms

  • Up / Down alarm set point controls

  • Alarm test, alarm silence and alarm off function

  • Battery test function and strength indicator

  • 0-1 VDC or RS-232 digital output port

  • Sensor fail / disconnect alarm

  • Long life (36 month) R-17S oxygen sensor

  • Rugged, high impact, ABS plastic housing

  • Sample adapter kit

  • V mount adapter plate

  • Watertight carrying case

  • Lock key protection settings

  • Audio and visual indicators alerting the user to trouble

  • 2 year warranty on sensor and instrument


​Measurin​g Range

​0-100% oxygen


​± 2% of FS at constant temperature

Response Time

​90% of step change in less than 10 seconds


​Operating:    32° to 104°F (0° to 40°C)
Storage:        -40° to 122°F (-40° to 50°C)


​3 AA alkaline batteries

​Battery / Sensor Life

Battery life:    2,000 hours in non-alarm state
Sensor life:    36 months in air

​Sensor Type


​Sensor Cable

​Extends to 10 feet (3 m)

​Signal Output

​0-1 VDC or RS-232 (2400 Baud rate)


​24 months:    Covers defects in material and workmanship


​CE Mark


5.5"H x 3.5"W x 3"D (2.17 x 1.38 x 1.18 cm)
1 lb (454 g)



​​File S​ize​​​

Model MD300 Bro​chure