One2One O2 Oxygen Monitor and Remote Alarm


Low cost and simple two part system consisting of a monitor and a remote LCD display alarm unit, battery powered with two year long life sensor and easily replaceable sensor and battery packs. Continuous monitoring is achieved with a battery powered system and eliminating the need for wiring to mains. Ease of installation provides immediate maximum protection as both units are equipped with visual and audible alarms.

The system is supplied as standard with a 10m interconnecting lead. Leads up to 100m can be supplied upon request.


The One2One system is ideal for single room set-ups providing reliable operation with minimal installation by simply screwing to the wall. The concentration of the oxygen in the surrounding air is continuously monitored and both units provide two alarm states: Alarm and Critical Alarm. In the event of falling concentration levels of oxygen, the system provides visual and audible alarms to ensure the safety of respective personnel. 

Key Features
  • No charging necessary. Two year sensor and battery pack ensuring constant monitoring and cannot be switched off.
  • Two independent alarm levels: Alarm and Critical Alarm.
  • Loud audible alarm at 85dbA.
  • Large, clear LCD display of remote alarm unit provides a digital readout of oxygen concentration at all times.
  • Easy installation to a flat surface at an appropriate sensing point by screwing to the wall and immediate plug-and-play operation with easy fitting connectors.
  • Confidence flash on oxygen monitor to ensure maximum user visibility.
  • User replaceable sensor and battery packs.
  • Simple self-calibration mode for optimum performance

Monitor/ Alarm Unit  
Dimensions 80 (h) × 120 (w) × 55 (d) mm
Weight (excl cable) 550g
Alarm indications Audible 85dA at 30cm
Calibration test Two calibration mode: ‘Cal High’ and ‘Cal Low’
Indications and Alarms Low oxygen (19.5%)*
Critically Low Oxygen (18%)*
Alarm (Red flashing LED + audible bleep)
Critical Alarm (Red flashing LED + audible bleep)
Battery warning (Amber flashing LED + constant tone)
Calibration lights (Two green constant LEDs)
Confidence flash (Green flashing LED)
Remote Alarm Unit  
Dimensions 80 (h) ×120 (w) ×55 (d) mm
Weight (excl cable) 500g
Alarm indications LCD display
Audible 85dbA at 30cm
Read-out LCD display at 0.01
Indications and Alarms Alarm (Red flashing LED + audible bleep)
Analogue panel meter (17 – 22 % oxygen)
Interconnecting cable 10 m (standard); custom length available upon request

*Alarm levels are factory pre-set and may be varied according to industry best practice levels. 

Model A- 19.5% & 18% monitoring

Model B - 22% & 24% monitoring

Model C - 18% & 22% monitoring