Boiler and plant rooms
Gas and oil appliances in rooms nobody visits between services. A rising level reaches the facilities team the same hour.
Carbon monoxide monitoring tag
The ZARC carbon monoxide tag reports the CO concentration in a space, in parts per million and in real time, and sends an alert to named people when it rises. It is fitted where fuel is burned or engines run: plant rooms, car parks, loading bays and workshops. It is complementary monitoring. It works alongside certified carbon monoxide alarms and gas detection, and never in place of them.
01
What it reports
The tag reads carbon monoxide continuously and reports in parts per million at the interval set for the site, down to every minute. Each report can carry the current level and the maximum, minimum and average for the interval.
Carbon monoxide has no smell and no colour, so a reading is the only sight of it. A local alarm sounds in the room; the tag tells the people responsible, wherever they are, and keeps the record of what happened and for how long.
A slow rise is as useful as a sudden one. A level that creeps up over weeks points to an appliance, flue or extract that needs attention before it becomes an incident.
Alerts can be set on a level, on a rate of rise, or on time spent above a limit, with limits chosen against the workplace exposure limits published by the Health and Safety Executive.
The tag is complementary monitoring; it does not replace certified gas detection. It is not a carbon monoxide alarm for sleeping or living accommodation, not a personal gas monitor, and not for use in zoned hazardous areas.
02
Applications
Carbon monoxide appears wherever combustion and enclosed space meet. The uses below are the common ones, and in each the tag adds remote sight and a record to the safety equipment already in place.
Car parks
Enclosed and basement car parks, where extract fans are meant to keep exhaust down. The trend shows whether they do at peak times.
Loading bays and warehouses
Vehicle exhaust drawn into a building through open doors, and engine-driven trucks working inside it.
Commercial kitchens
Gas and solid-fuel appliances under extract that may have stopped pulling.
Generators and heaters on enclosed sites
Temporary plant running inside a structure under construction, where air changes as the building closes up.
Workshops and vehicle bays
Engines run indoors for testing and repair.
Empty buildings with heating left on
An appliance running unattended for weeks, with nobody there to hear a local alarm.
Many plant rooms, one view
Every plant room on an estate on a single dashboard, with the same limits and the same alert routes.
After an incident
A dated record of the level before, during and after, for the investigation and the insurer.
03
Where it can go
Position follows the appliance or the vehicles. Typical positions:
Plant rooms
On a wall near the appliance, at the height its maker advises for CO sensing.
Car parks
On columns or walls away from the extract points, where exhaust lingers.
Loading bays
Inside the doors, where exhaust is drawn in.
Kitchens
Away from the cooking line, in the air staff breathe.
Temporary works
Near generators and heaters, moved as the site changes.
Adjoining rooms
In the occupied space next to a plant room or bay.
04
In the dashboard
Every tag shows its live level and a trend from the last hour to the last year. The dashboard works out the maximum, minimum and average over any period and the time spent above each limit, so a car park's peak hour and a plant room's slow drift are both plain. Records export for maintenance files, investigations and insurers.
Limits are set per tag: level, rate of rise and duration. When one is crossed the alert is raised in real time and goes by email or SMS, and through an app where required, to the people you name, with escalation to further contacts.
- Live ppm for every tag, grouped by site
- Trend graphs from one hour to one year
- Maximum, minimum and average over any period
- Time above each limit
- Slow rises over weeks made visible
- Peak hours by time of day and day of week
- Plant rooms and sites compared side by side
- Every alert logged with the reading that raised it
- Records exported for investigations and insurers
- A tag that misses its reporting interval is flagged
05
Industries
Carbon monoxide tags are fitted wherever fuel is burned or engines run under a roof, including:
Facilities management
Plant rooms across a portfolio.
Buildings and estates
Car parks, boiler rooms and kitchens.
Logistics and supply chain
Loading bays and warehouses with vehicles.
Industrial and manufacturing
Workshops, test bays and process plant.
Construction and temporary works
Generators and heaters in enclosed works.
Local government and public sector
Depots, schools and public buildings.
06
Technical specification
| Parameter | Specification |
|---|---|
| Measurement | Carbon monoxide concentration in air, read continuously and reported in real time |
| Gas | Carbon monoxide (CO) |
| Units | ppm |
| Sensing | Electrochemical cell |
| Values reported | Current level, maximum, minimum and average for each reporting interval |
| Range and accuracy | Specified to the requirement |
| Calibration | Sensors supplied calibrated by the sensor manufacturer |
| Sensor life | Stated for the sensor fitted; replacement planned at order |
| Reporting interval | Configurable, down to every minute |
| Limit alerts | Level above a limit you set |
| Trend alerts | Level rising at a rate you set, over minutes or over weeks |
| Duration alerts | Time above a limit, so a brief peak does not alarm |
| Alert delivery | Dashboard, email or SMS; app where required |
| Recipients | Named people and groups, with escalation to further contacts |
| Missed reports | A tag that misses its reporting interval is flagged in the dashboard |
| Gateway power loss | Raises its own platform alert |
| Dashboard | Live level, trends, max/min/average, time above limits, sites compared; configured to your requirement |
| Records | Every reading and alert time-stamped and exportable |
| Data | Full reading history; UK-hosted or on servers on your own site |
| Power | Internal battery, up to five years as standard; longer with additional cells |
| Radio | 433 MHz, one-way (transmit only) |
| Radio range | Site-dependent; confirmed by site survey |
| Environment | Indoor or outdoor, enclosure specified to the location |
| Enclosure | Vented to the air it samples; standard or built to the site |
| Mounting | Wall or column, positioned to the appliance or vehicle route |
| Works alongside | Certified carbon monoxide alarms and fixed gas detection |
| Not for | Sleeping or living accommodation, personal gas monitoring or zoned hazardous areas |
| Charges | No per-alert, per-user or licence charges |
| Manufacture | Made to order in the UK |
| Certification | CE marked |
07
From requirement to live alerts
Requirement
Tell us where fuel is burned or engines run, and what safety equipment is already fitted. The tag is placed to add to it.
Configuration
Tags are built to order with the range, reporting interval and limits agreed for each space.
Fitting
One fixing per tag and no cable. Nothing is connected to the appliance or the existing alarm.
Commissioning
Normal levels are recorded, limits are set against them and the published exposure limits, and alert routes are tested.
Ready to get started? Every deployment begins with a site survey.
Book a site survey08
How it reports
The tag transmits each reading on 433 MHz to a ZARC gateway, which forwards it to the dashboard, where limits are checked and alerts sent. There is no receiver on the tag. It is independent of the appliance, the extract controls and any local alarm, so it still reports when one of those has failed.
Related tags
Carbon dioxide (CO₂)
Ventilation in the same space.
Air quality
Particulates and nitrogen dioxide from exhaust.
Alarm relay
Takes an existing gas alarm panel output off site.
Temperature
Plant room and flue temperatures.
Questions we answer most.
What does the carbon monoxide tag do?
It reports the CO level in a space in ppm and alerts named people when it rises, with a full record of the level over time.
Does it replace a carbon monoxide alarm?
No. It is complementary monitoring that works alongside certified CO alarms and gas detection, never in place of them.
Why fit one if there is already an alarm?
A local alarm sounds in the room. The tag tells people who are elsewhere, and records what happened before and after.
Can it show a slow rise?
Yes. A level creeping up over weeks shows on the trend and can raise an alert before it reaches a limit.
Is it suitable for bedrooms or homes?
No. It is not a carbon monoxide alarm for sleeping or living accommodation.
Can it be used in a car park?
Yes. It reports exhaust levels and shows whether extract is keeping them down at peak times.
What limits should be set?
Limits are chosen for the site against the workplace exposure limits published by the Health and Safety Executive.
What sensor does it use?
An electrochemical cell, supplied calibrated by the sensor manufacturer, with its life stated at order.
Does it need power or a network?
No. It runs on an internal battery and reports by radio to a ZARC gateway.
How long does the battery last?
Up to five years as standard, and longer where additional cells are fitted.
Is it for zoned hazardous areas?
No. The tag is not for use in zoned hazardous areas.
Looking for something else?
We work with any sensor for any application.
Most sensing needs are met by a tag we already build, configured for your equipment. If yours needs a sensor or interface we don't list, we have the engineering to build it. Tell us what you need to measure, and we will tell you how we would do it.
Discuss your requirementDiscuss a monitoring
or alerting solution
Tell us what is happening on site, what you need to see, and the event you need to hear about. We will come back with the system that answers it.
Direct contact
Location
Venator House, Unit 9, 15-17 St Stephen's Road, Bournemouth
Dorset, BH2 6LA · VAT GB 409644484
Products contact
Contact the engineering team
Direct to the team that designs and builds the range. Tell us the equipment and the event that matters.