Gas Alarm GX-D1
€116.81
The CO₂ detector for a healthy indoor climate: plug in and be reminded in time to let in fresh air
The Schabus CO₂ Detector GX-D1 is a plug-and-play warning device for monitoring indoor air in rooms with many people, for example classrooms, offices, meeting rooms and waiting rooms. It continuously measures with an internal NDIR infrared sensor and reminds you to ventilate already at a concentration that is well below a hazardous level. To do this, it emits a clear piezo alarm tone and the red LED indicates the alarm.
Exhaled air causes the concentration of carbon dioxide (CO₂) in the room to rise. From around 1,400 ppm the air quality is considered significantly impaired; above 2,000 ppm concentration and performance can noticeably decline, and with persistently high values the risk of infection increases as the immune system is also weakened. The GX-D1 is therefore deliberately set to be very sensitive: the pre-alarm occurs at approx. 2,000 ppm, the alarm at 2,500 ppm. This corresponds to roughly half the MAK value (TRGS 900), but is still not a life-threatening level.
The GX-D1 is simply plugged into a 230 V socket; batteries or mounting are not required. It is ready for operation within a few minutes. The device has no options or variants.
Important note: The GX-D1 primarily serves as a reminder to ventilate. It may only be installed in dry indoor rooms, not in potentially explosive atmospheres and not in industrial or commercial environments. It does not replace the proper installation, use and maintenance of appliances with CO₂ cylinders including the associated ventilation and exhaust systems.
Plug in, ventilate, think clearly
The GX-D1 reliably reminds you to ventilate, without continuous beeping and without any operating effort.
Plug-and-Play
Socket device for 230 V, installed in seconds, no mounting and no battery.
NDIR infrared sensor
The internal sensor measures CO₂ continuously, is long-lasting and maintenance-free.
Two alarm levels
Pre-alarm at approx. 2,000 ppm, alarm at 2,500 ppm CO₂ (roughly half the MAK value).
Acoustic and visual
Clear piezo tone and red alarm LED that flashes during the main alarm.
No false triggers
The alarm only triggers when more than 2,500 ppm are detected for longer than 30 seconds.
Mute function
With the test button the alarm tone can be switched off while you ventilate.
Self-test
If the device detects a sensor fault, it reports it with the flashing yellow error LED.
Automatic silence
After ventilation the alarm stops by itself and the device returns to normal operation.
What’s in the box
- Warning device GX-D1 (socket device with internal sensor)
- Operating instructions
How the GX-D1 is constructed
The GX-D1 is a compact one-piece device: sensor, evaluation and signal transmitter are integrated in the housing; there is no cable and no external sensor.
Housing with Schuko plug
The device is plugged directly into a 230 V socket and is powered from the mains.
Internal NDIR sensor with ventilation slots
The infrared sensor is located in the housing. Air reaches the sensor through the ventilation slots, so these must not be covered and must remain free of dust and dirt.
Three status LEDs
Green (Operate) indicates operation, yellow/orange (Error) a sensor fault and red (Alarm) the pre-alarm or alarm.
Test button
Checks LEDs and alarm tone and mutes the tone in the event of an alarm.
Piezo signal transmitter
Emits a short double tone every 10 seconds during the pre-alarm and the clear alarm tone during the alarm.
Position correctly and put into operation
Read the operating instructions thoroughly before installation and first commissioning. The device may only be installed in dry indoor rooms.
The right position
Lower to middle room height
To monitor general indoor air quality, choose a socket at lower to middle room height, no more than 2 m above the floor.
Distance from edges and corners
At least approx. 30 cm distance from edges and corners of the room. Exhaled CO₂ is initially warmer than the room air and rises before it mixes.
Position less critical
CO₂ from exhaled air distributes well in the room; positioning is not as critical as with CO or natural gas. Mounted somewhat lower the detector reacts more sensitively, higher somewhat more tolerantly.
These locations are not suitable
- Places that could prevent the alarm from triggering, e.g. behind curtains or in cupboards
- Directly above a cooker or combustion appliance or above a sink
- Next to doors, windows, ventilation, fan or air conditioning
- Areas where dust, moisture or dirt can put the sensor out of operation
Commissioning step by step
- Ensure a well-ventilated room before commissioning.
- Plug the GX-D1 into a 230 V socket. The three LEDs light up briefly one after the other and a short alarm sounds.
- Wait for the sensor warm-up time of a few minutes (approx. 3). The green LED flashes. Move away from the device during this time and do not breathe on it.
- When the green LED lights continuously, the GX-D1 is ready for operation.
The service life and reliability of the sensor increase significantly when the GX-D1 is operated in a regularly well-ventilated room. Around 30 minutes of fresh air per day is a desirable optimum. The service life is several years depending on the environment.
How the GX-D1 reacts and how to check it
Normal operation
The green LED lights; the CO₂ concentration is below the pre-alarm threshold.
Pre-alarm above 2,000 ppm
The red alarm LED lights and a short double alarm tone sounds every 10 seconds.
Alarm above 2,500 ppm
Only when the elevated concentration is detected for longer than 30 seconds does the alarm sound and the red LED flash.
Behaviour in the event of an alarm
- Open windows and doors and thoroughly ventilate the room or the house. Inform other people in the room.
- Cross-ventilation is better and more effective than shock ventilation. Provide a few minutes of through-draught to ensure a good indoor climate for working and learning.
- If necessary, mute the alarm tone with the test button. The alarm becomes active again at the next threshold change.
Test with the test button
Press the test button for a few seconds. You hear the alarm tone and all three LEDs light up briefly. Only the LEDs and the acoustic alarm are tested; this test says nothing about the condition of the sensor.
Function test with exhaled air, recommended monthly
A person exhales approx. 4 to 5 % CO₂. Take a deep breath and slowly blow it onto the sensor. The sensor needs up to one minute reaction time; if necessary, repeat until the alarm. The manufacturer recommends the test monthly for your own safety. Dust can be removed from the sensor by blowing; please keep moisture away from the sensor.
Sensor error and false alarm
Yellow/orange error LED flashes
The device has detected a sensor malfunction during the self-test. Unplug the device and contact the manufacturer. They will also help after statutory periods have expired.
False alarm possible
The sensitive sensor may also respond to other gaseous media. Aerosols (propellant in hair or disinfectant sprays), strong tobacco smoke and cooking fumes can cause false alarms. Many people in small rooms also raise CO₂ values quickly.
Cleaning and maintenance
Avoid the influence of moisture (splash or rain water), dust and direct sunlight on the device. Clean it only with a dry linen cloth, which may be slightly dampened in case of heavy soiling. Do not use solvent-based cleaning agents.
Manufacturer’s notes
- Read the operating instructions carefully before installation and commissioning and keep them
- Do not open the device; it contains no parts that can be serviced by the user
- Packaging material is not a toy and must be kept away from children
- Suitable for normal household use; not approved for other uses
- Intended for residential buildings, sales areas and rooms of small businesses such as workshops and service centres, each connected to the public low-voltage network
- Do not use in potentially explosive atmospheres or in industrial/commercial environments
- The declaration of conformity is available for download on the manufacturer’s website
Warranty, guarantee, return and disposal
The GX-D1 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. Repair and spare parts are available directly from the manufacturer, even beyond the statutory warranty. Personal specialist advice is available without a call centre directly from the manufacturer. In the event of a warranty claim, the device is sent in with a description of the fault, proof of purchase as well as address and delivery address. The device must have been used in accordance with the operating instructions.
Return: In the event of a defect, first contact the manufacturer and state the complete address as well as the reason for return. Within Germany, a free returns label is sent by e-mail. Unpaid parcels will not be accepted, and unjustified returns that do not constitute a complaint will be charged subsequently.
The GX-D1 does not belong in household waste. The crossed-out wheeled bin symbol on the product reminds you to use the take-back systems for waste electrical and electronic equipment (WEEE No. DE91394868). Further information is available from your local waste advice centre or from the manufacturer.
Areas of application
- Classrooms, training and seminar rooms
- Day-care centres
- Offices and open-plan offices
- Meeting and conference rooms
- Waiting rooms and medical practices
- Recreation rooms
- Co-working spaces
- Workshops in small businesses
- Living rooms and household
The Schabus CO₂ Detector GX-D1: Because good air knows no compromises.
Frequently asked questions
What is the GX-D1 intended for?
It reminds you to ventilate in rooms with many people, long before the CO₂ concentration becomes dangerous. It is not a device for technical CO₂ systems and not for industrial or commercial environments.
When does the GX-D1 respond?
The pre-alarm occurs at more than 2,000 ppm CO₂: the red LED lights and a double tone sounds every 10 seconds. The alarm occurs when more than 2,500 ppm are detected for longer than 30 seconds; the red LED then flashes.
Is 2,500 ppm already dangerous?
No. The value corresponds to roughly half the MAK value (TRGS 900) and is not yet life-threatening. It primarily reminds you to thoroughly ventilate the room, because with persistently high values concentration and performance decline and the risk of infection increases.
Where is the best place to plug in the GX-D1?
In a socket at lower to middle room height (no more than 2 m above the floor) and at least approx. 30 cm away from edges and corners. Not behind curtains or in cupboards, not above a cooker or sink and not next to doors, windows, ventilation, fan or air conditioning.
How long does it take until it is ready for operation?
After plugging in, the LEDs light up briefly one after the other and a short alarm sounds. This is followed by a warm-up time of a few minutes (approx. 3), during which the green LED flashes. When it lights continuously, the device is ready for operation. Ensure a well-ventilated room and do not breathe on the device.
How do I switch off the alarm tone?
With the test button. You can then ventilate. If the alarm does not stop by itself because the concentration is still high, continue ventilating, preferably with through-draught. The alarm becomes active again at the next threshold change.
How do I test the function?
With the test button you check LEDs and alarm tone. You test the sensor with your breath: take a deep breath and slowly blow onto the sensor, if necessary wait up to one minute reaction time and repeat. The manufacturer recommends the test monthly.
The yellow LED is flashing. What should I do?
The self-test has detected a sensor fault. Unplug the device and contact the manufacturer.
Why is there an alarm even though no one is in the room?
The sensitive sensor can also react to other gaseous media, for example aerosols from sprays, strong tobacco smoke or cooking fumes.
How long does the sensor last?
That depends on the environment. Service life and reliability increase significantly when the GX-D1 is operated in a regularly well-ventilated room. Around 30 minutes of fresh air per day is a desirable optimum.
How long is the guarantee valid?
The statutory warranty of at least 2 years in the EU applies. In addition, Schabus offers a 5-year guarantee that can be registered online.
Questions about the CO₂ Detector GX-D1?
Our support team in Germany advises you free of charge on selection, installation and configuration.
CO₂ Alarm GX-D1 – For Fresh Air in Schools, Offices, and Workspaces
The GX-D1 is a compact CO₂ monitor for indoor areas such as classrooms, offices, or workspaces. It reliably detects elevated CO₂ concentrations using NDIR infrared sensor technology and provides an early warning when ventilation is needed. Ideal for improving indoor air quality and supporting focused, healthy work.
Technical Data
- Operating voltage: 230 V AC, 50–60 Hz (±10%)
- Power consumption: approx. 3 W
- Protection rating: IP 20
- Dimensions (H×W×D): 118 × 60 × 44 mm (without plug)
- Service life: 6–10 years (depending on environment)
Sensor & Measurement
- Sensor type: NDIR infrared
- Sensitivity / trigger concentration: approx. 2000–2500 ppm CO₂
Alarm
- Alarm threshold: 2500 ppm CO₂
- Sound pressure level: from 80 dB(A) @ 10 cm, max. 90 dB
Environmental Conditions
- Operating temperature range: +10 °C to +35 °C
- Manufacturer specified range: 0 °C to +40 °C
- Storage temperature: -20 °C to +70 °C
- Humidity: 5–90% rH (non-condensing)
Manufacturer information:
Electrical engineering Schabus GmbH & Co. KG
Baierbacher Straße 150
83071 Stephanskirchen
Germany
Telephone: +49 80 36 / 674 979 – 0
Email: info@elektrotechnik-schabus.de
Responsible person:
Didactum® Security GmbH
Im Mühlenfeld 4
48163 Münster
Deutschland
Fon:
(+49) 250 19 71 63 54 / (+49) 171 33 11 577
Email: info@didactum-security.de
