Sense CO: Enhanced carbon monoxide sensor testing

How to activate Sense CO testing

To ensure accurate results when using low levels of CO test gas, please follow these steps:

1. Press the test button three times in quick succession.
   • This activates Sense CO mode.
   • If no further action is taken, the request to enter this mode will time out after two minutes.
2. Once activated, the alarm will enter a continuous CO-acquisition cycle for approximately 2–3 minutes.
   • The amber ‘ventilate’ LED will flash once per second.
   • During this period, the alarm is highly responsive to CO at levels of around 30ppm.
3. If carbon monoxide is detected during Sense CO mode, the alarm will sound the following sequence:
   • Four loud beeps > Five-second pause > Four loud beeps

Why use Sense CO testing?

In environments where there is an increased risk of CO ingress – such as caravans or motorhomes, or locations close to vehicles, generators, or barbecues – Sense CO offers a more sensitive and controlled method of confirming that the sensor can detect low concentrations of carbon monoxide.

Trade professionals particularly value Sense CO for annual checking, commissioning, and servicing of alarms, but homeowners may also use it if they have concerns about possible CO exposure.

Safety information

• Only use approved CO test gas and follow the instructions in your product manual.
• Do not use any alternative testing methods or attempt to modify or tamper with the alarm, as this may cause electric shock or malfunction.
• Sensor testing should only be carried out by a responsible adult.
• It is recommended that Sense CO sensor testing is performed once per year.

Need CO test gas?

Approved CO test gas can be purchased to carry out Sense CO testing safely and effectively. This should only be purchased from reliable traders.