GX-CO Gas Sensor

The external carbon monoxide sensor for technical monitoring – Accessory for the GX-A1+ and GX-HS gas warning devices

The Schabus GX-CO is an external gas sensor for the detection of carbon monoxide (CO) and smoke in the ambient air. It is used as an accessory for the GX-A1+ and GX-HS gas warning devices and is connected via an RJ plug connection on the cable.

In combination with the gas warning control units, the sensor enables continuous monitoring of technical installations with potential CO sources, for example in boiler rooms, technical rooms or underground car parks. It is compact, has low power consumption and can be easily integrated into Schabus gas warning systems.

The GX-CO must not be used in potentially explosive atmospheres.

Danger detected – danger averted

The GX-CO reports carbon monoxide and smoke at an early stage to the connected gas warning device.

Why CO monitoring is crucial

Carbon monoxide is imperceptible. Early detection helps to recognise hazards in good time.

• Carbon monoxide is colourless, odourless and tasteless
• It is produced by incomplete combustion
• It is harmful to health even at low concentrations
• Carbon monoxide is also produced during the development of smoke from fires

Typical sources of danger

• Gas and oil heating systems
• Open fireplaces
• Wood-burning stoves
• Combustion engines
• Emergency power generators
• Combined heat and power plants

How the sensor works

The GX-CO monitors the ambient air and supplies the measurement signal to the connected gas warning device.

• The sensor is powered and connected via the GX-A1+ or GX-HS gas warning device
• It continuously monitors the ambient air for carbon monoxide and smoke
• The gas warning device evaluates the signal and warns in the event of elevated concentrations
• The sensor reacts differentially depending on the medium to various gases and vapours
• It shows particularly high sensitivity to alcohols and organic solvents
• Increased sensitivity also exists to ethanol vapour and alcohol vapours
• The sensitivity diagram in the operating instructions shows the sensitivity profile to ethanol vapour as well as to various gases and vapours
• This cross-sensitivity must be taken into account when installing in corresponding environments

What is included in the box

The sensor is supplied with sensor cable and mounting material.

• Gas sensor GX-CO
• Mounting material (screw & wall plug)
• Operating instructions

Only usable in conjunction with GX-A1+ or GX-HS.

How the GX-CO is constructed

The GX-CO is a compact external sensor with a permanently connected supply cable.

Mounting and connection

Installation must be carried out by a qualified specialist. Read the operating instructions thoroughly before mounting and commissioning and follow the safety instructions.

Positioning the sensor

1. Install the sensor only in dry indoor rooms and position it correctly according to the type of gas to ensure proper functioning of the warning device.
2. Mount the external sensor as close as possible to the combustion appliance to be monitored or to the flue, fireplace or chimney, but approx. 15–30 cm below the ceiling, as the escaping gases are heated and initially rise upwards.
3. The prescribed mounting height must be strictly observed.
4. The sensor cable must be permanently installed as surface-mounted wiring.

Connecting the sensor

1. Connect the sensor to the GX-A1+ or GX-HS gas warning device via the RJ plug connection. Connection is described in the operating instructions of the gas warning device.

Extending the sensor cable

The sensor cables are 2.5 m long as standard. A 3-core cable must be used for extension. The following minimum cross-sections apply:

• 3 × 0.75 mm²: maximum length 10 m
• 3 × 1.5 mm²: maximum length 20 m

For extension, the manufacturer recommends the control cable LIYY (Art. No. 300780).

Do not mount

The sensor must not be mounted in the following locations:

• Places that could prevent alarm activation in the event of a gas leak (e.g. behind curtains or in cupboards)
• Directly next to a cooker or above a sink
• Next to a door, windows, ventilation, fan, air conditioning, etc.
• In areas where dust or dirt can put the sensor out of operation
• In potentially explosive atmospheres

Function test, false alarms and behaviour in the event of an alarm

Function test and care

• For safety reasons, the manufacturer recommends carrying out the function test monthly
• Clean the sensor regularly by blowing off the dust
• Observe the test date indicated on the sensor and return the sensor to Elektrotechnik Schabus for factory testing and replacement
• Avoid moisture (splash or rain water), dust and direct sunlight on the device
• Clean only with a dry linen cloth; if heavily soiled, slightly dampened; no solvent-based cleaning agents

False alarms

The sensitive sensor of the system also responds to other gaseous media. The following can lead to a false alarm:

• The use of aerosols (propellant gas in sprays for hair, disinfection, etc.)
• Heavy tobacco smoke (e.g. a smoking card party)
• Cooking fumes

Behaviour in the event of an alarm

• Do not unplug the warning device
• Do not switch on any further electrical appliances
• Do not light any open flames or extinguish open fires
• Ensure fresh air: remain calm, open all doors and windows and thoroughly ventilate the room or house
• If the alarm continues or occurs again, evacuate the building and leave all windows and doors open. Ensure that all persons in the house are warned
• Investigate the room or house for possible sources of fire
• Carbon monoxide is produced during the development of smoke from fires. Important: All persons must leave the house
• Eliminate the cause of the gas leak. In case of uncertainty, contact the energy supply specialist
• In the event of a persistent or repeated alarm, contact the energy supply specialist or the fire brigade
• Provide medical help for anyone showing symptoms of carbon monoxide poisoning and point out that inhalation of carbon monoxide is suspected
• Only put the combustion appliance back into operation after it has been checked by a competent person and released for use again

Manufacturer’s notes

• Read the operating instructions thoroughly before mounting and commissioning and keep them; they form part of the product
• The sensor is a technical monitoring sensor and does not replace a stand-alone, standard-tested CO alarm for direct personal protection
• The sensor is not suitable for potentially explosive atmospheres
• The sensor is intended only for dry indoor rooms
• Do not open the device; it contains no parts that can be maintained by the user
• Packaging material is not a toy and must be kept away from children
• The device is not approved for any use other than that described
• Intended for residential areas (houses, flats, rooms), commercial and business premises (shops, hypermarkets), small businesses (workshops, service centres) with connection to the public low-voltage network
• The manufacturer is not liable for damage or losses of any kind, e.g. individual or consequential damage, resulting from the fact that no alarm signal is given by the gas detector despite elevated gas concentration
• The declaration of conformity is available for download on the manufacturer’s website

Warranty, guarantee, return and disposal

The device is covered by the statutory warranty of at least 2 years in the EU. The manufacturer Elektrotechnik Schabus additionally offers a 5-year guarantee that can be registered online. There is a right of withdrawal of 14 days. Repair and spare parts are available directly from the manufacturer, even beyond the statutory warranty.

The manufacturer repairs or replaces the device free of charge in the event of a warranty claim if the following is fulfilled: The device is sent in with a description of the fault, proof of purchase and address and delivery address (name, telephone number, street, house number, postcode, city, country), adequately packed (the manufacturer accepts no liability for damage or loss during shipping) and used in accordance with the operating instructions. No liability is accepted for damage caused by accident, misuse, modification or negligence.

In the event of a defect, please contact the manufacturer and provide your complete address and the reason for return. Within Germany you will receive a free return label by e-mail. Carriage forward packages will not be accepted; unjustified returns that do not constitute a complaint will be charged subsequently.

The device does not belong in household waste. The crossed-out wheeled bin symbol reminds you to use the take-back systems for waste electrical and electronic equipment (WEEE No. 91394868). The product may contain substances that are hazardous to health and the environment. Information on collection, reuse and recycling systems can be obtained from your local waste advisory service or from the manufacturer.

Why the GX-CO is suitable

Areas of application

• Boiler rooms with gas or oil burners
• Rooms with open fireplaces or wood-burning stoves
• Underground car parks
• Workshops with running combustion engines
• Installations with emergency power generators
• Installations with combined heat and power plants
• Technical rooms
• Residential buildings with potential CO sources

The Schabus GX-CO monitors technical installations with potential CO sources and reports carbon monoxide and smoke to the connected gas warning device.

Gas warning devices with which the GX-CO is operated

• GX-A1+ – Gas warning control unit from Schabus
• GX-HS – Signalling device from Schabus

Frequently asked questions