Seguridad CO2 · LogiCO2
LogiCO2 Mk90 stand-alone CO2 sensor for leak detection with built-in alarm
The LogiCO2 Mk90 standalone CO2 sensor base set is an autonomous detector with integrated audible and visual alarm to monitor CO2 concentration in confined spaces and warn when unhealthy or hazardous levels are reached.
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This unit addresses a very specific need: monitoring CO2 leaks in a risk area without relying on a central unit included in the set. That is why it works well as a standalone solution in spaces where CO2 is used or piped and a clear local alert is required.
Its practical value lies in bringing together in a single kit the Mk90 sensor, the strobe sounder/beacon, the power supply, wiring and basic signage. This makes for a clean initial deployment and reduces complexity compared with configurations assembled piece by piece.
In addition, the sensor includes integrated audible and visual indication, display, automatic self-calibration and manual altitude adjustment. If the installation is expanded in the future, the manufacturer states that this standalone sensor can be connected to the Mk9 central unit and to the Mk9 CO2 sensor set.
Key data
Artículo fabricante
2090
SKU Install Beer
LG002
System type
Standalone sensor with local alarm
Power supply for the set
12-24 V CC
Communication
Modbus protocol over RS485
Preset levels
5000 ppm, 1.5% and 3.0% CO2
Important: this set operates as a standalone local detection system, but does not include a central unit. If the installation has multiple access points or several risk areas, additional signage or complementary components may be required.
Main features
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Standalone operation The Mk90 is designed as an independent system to monitor a specific area, with no central unit included.
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Built-in audible and visual alarm The sensor monitors CO2 and generates a local warning when configured alert or alarm levels are reached.
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Remote sounder/beacon included The kit includes a strobe sounder/beacon with amber glass and a 1-metre cable.
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NDIR detection The sensor uses non-dispersive infrared analysis and a thermistor to measure CO2 and temperature.
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Automatic self‑calibration The unit performs self‑calibration at regular intervals, reducing the need for manual calibration in a normal environment.
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Manual altitude adjustment The Mk90 allows manual altitude adjustment to adapt the measurement to the installation.
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Display and local readout The display alternates between CO2 concentration, TWA and temperature.
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Connectable to Mk9 systems The manufacturer states that it is compatible for connection with the Mk9 central unit and the Mk9 sensor set.
Technical specifications
Confirmed technical specifications of the LogiCO2 Mk90 standalone base sensor set
| Parameter |
Dato confirmado |
| Brand |
LogiCO2 |
| Model |
CO2 Mk90 Stand-Alone Base SET / Stand-alone CO2 Mk90 Sensor Base Set |
| SKU |
LG002 |
| MPN / manufacturer part number |
2090 |
| Equipment type |
Standalone CO2 detector with built-in audible and visual alarm |
| Configuración del conjunto |
Mk90 sensor + strobe sounder/beacon + power supply + cabling + signage + protective cover |
| Power supply for the set |
12-24 V CC |
| Alimentación del sensor |
24 V CC |
| Consumo del sensor |
56 mA without alarm; 117 mA in alarm state |
| Sounder/beacon power consumption |
60 mA peak with 24 V DC supply |
| Communication |
Modbus protocol over RS485 |
| Conexiones de cableado |
RJ45 |
| Salidas |
2 x 24 V DC transistor outputs, minimum 1 mA |
| Pantalla |
LCD |
| Operating principle |
Non-dispersive infrared (NDIR) and thermistor |
| Rango de medición de CO2 |
0–3% vol. |
| Gama ampliada de CO2 |
3-6,7 % vol. |
| Sampling mode |
Difusión |
| TWA |
8‑hour time‑weighted average with 2‑minute sampling period |
| Preset levels |
5000 ppm awareness indication; 5000 ppm TWA/8 h alarm; 1.5% low alarm 1/2 STEL; 3.0% high alarm STEL |
| Precisión CO2 |
±200 ppm ±10% of reading |
| Temperature accuracy |
±1 °C |
| Resolución |
CO2: 0,01 % vol. · Temperatura: 1 °C |
| Sensor operating temperature |
0 a +45 °C |
| Sensor operating humidity |
0 to 95% RH non-condensing |
| Tiempo de calentamiento |
1 minute at 22 °C |
| Vida útil del sensor |
> 15 years |
| Sensor dimensions |
90 x 161 x 38 mm |
| Protección del sensor |
IP54 |
| Horn/strobe rated voltage |
18-24 V CC |
| Intensidad acústica |
Mk90: 80 dBa (1 m) max · Horn/strobe: 110 dB at 1 m |
| Flash intensity |
115 CD |
| Flash frequency |
65/min |
| Sounder/beacon ambient temperature |
-5 to +50 °C |
| Sounder/beacon dimensions |
134 x 115 x 61 mm |
| Siren/beacon protection |
IP65 |
| Additional setting |
Manual altitude adjustment |
| Uso |
Solo para interiores |
| Weight |
Dato no facilitado |
| Scope of supply |
Mk90 CO2 sensor with one 10 m blue cable and one 5 m red cable, strobe horn with amber LED glass and blue indicator with 1 m cable and sign, RJ45 1-1 splitter, 1 A transformer, plug lock, bag with gaskets, ties, screws and plugs, Mk90 sensor sign, horn/strobe sign, Mk90 installation manual, Mk90 quick guide and protective cover. |
| Approvals and compliance |
CE, DIN6653-2 2015-06, UL certified, EN55022:2006/A1:2007, EN55024/A2:2003, EN61000-3-2:2006, EN61000-3-3/A2:2006, AS/NZS CISPR 22:2006, IEC/EN IT55022/55024, LNE Certification Rule NF 128. |
Compatibility and use cases
This set is intended for indoor spaces where CO2 is used or distributed and accumulation may occur due to leaks. It is suitable for hospitality, wineries, breweries, plant rooms, cold rooms, bottle areas, dispensing points and other confined spaces.
As a stand‑alone system, it is especially useful when direct local protection is needed in a single area. The manufacturer also states that the Mk90 Stand‑Alone sensor can be connected to the Mk9 central unit and the Mk9 CO2 sensor set, allowing it to be integrated into a larger installation.
If the room has several entrances, the manual itself states that more than one strobe siren/beacon may be required to ensure alarm visibility from all access points.
Installation and considerations before buying
- Install the sensor at a maximum height of 30 cm from the floor and at a maximum distance of 5 m from the CO2 distribution point.
- Each sensor covers a maximum area of 78 m²; if the room is larger or has several risk points, consider an expanded solution.
- The siren/beacon must be installed above the sensor, approximately 2–2.4 m from the floor and clearly visible from any entrance.
- The manual states that a second sounder/beacon outside the monitored area may also be advisable, preferably above the access door or doors.
- Use original RJ45 wiring and connectors and protect connectors and splitters from moisture and dust with the supplied accessories.
- The separate power supply must be connected with the appropriate plug adapter for the country and installed with the included plug lock.
- The product is for indoor use, and the signage should be mounted permanently and clearly visible next to or above the units.
- If the installation only has mechanical ventilation, the manual states that it must have a sensor.
Recommended maintenance and use
The Mk90 performs self-calibration at regular intervals, which under normal conditions eliminates the need for manual calibration. Even so, as it is safety equipment, it is advisable to periodically verify operation, signage visibility, cable condition and alarm response.
In real-world use, you should avoid impacts, boxes or moving elements that could damage the sensor installed at low height. The front of the detector must also be kept clear so as not to affect detection and local reading.
Frequently asked questions
Does this set work without a central unit?
Yes. It is a stand‑alone local detection system with integrated alarm and built‑in sounder/beacon.
Does it include sounder/beacon and power supply?
Yes. Set 2090 includes a strobe sounder/beacon, power supply, wiring, connectors, manual and signage.
Where should the Mk90 sensor be installed?
It must be installed at a maximum height of 30 cm from the floor and at a maximum distance of 5 m from the CO2 distribution point. Each sensor covers up to 78 m².
¿Dónde se monta la sirena/baliza?
Debe colocarse sobre el sensor, aproximadamente a 2-2,4 m del suelo y visible desde cualquier entrada a la zona vigilada.
Can it be connected to a larger LogiCO2 system?
Yes. The manufacturer states that the Mk90 Stand-Alone can be connected to the Mk9 central unit and to the Mk9 CO2 sensor set.
¿Necesita calibración manual periódica?
Under normal conditions no, because the unit performs automatic self-calibration. Even so, periodic functional checks are advisable.
