Gas Alarm GX-B2pro
€100.00
The plug-in gas alarm with external sensor: place the sensor where gas is present, with a loud alarm for natural gas, town gas and LPG
The Schabus GAS ALARM GX-B2pro is a gas detector designed as a plug-in device for town gas, natural gas and liquefied petroleum gas (LPG) with a separate sensor head. It already warns at a gas concentration far below the life-threatening level and is therefore set to high sensitivity. The unit is simply plugged into a 230 V socket; the external sensor is mounted flexibly via the cable at the optimal position.
In the event of danger, the GX-B2pro issues an acoustic warning with a loud alarm tone and an optical warning with a red flashing LED. It monitors gas heating systems, gas cookers, heating and utility rooms and is suitable for normal household use. The external sensor enables precise placement even when the socket is not at the ideal height. After a warm-up time of approximately three minutes it is ready for operation.
Important note: The GX-B2pro is only approved for the described use. It must not be used in potentially explosive atmospheres and only in dry indoor areas. Always observe the prescribed position of the sensor and obtain information from your utility company about the gas type and its properties.
Good to know: Natural gas (methane) is lighter than air and rises upwards. Liquefied petroleum gas (propane and butane) is heavier than air, sinks to the floor, spreads there in a similar way to water and collects in depressions. The sensor must therefore be placed high up for natural gas and low down for LPG. Natural gas and bottled gas can also always be recognised by their distinctive odour.
Plug in, position the sensor, stay safe
External sensor
The sensor is located at the point of danger, regardless of where the socket is situated.
Simply plug in
230 V plug-in device with simple, quick installation. Mounting material is included.
Three gas types
Detects town gas and natural gas (methane) as well as LPG such as propane and butane (camping gas).
Acoustic and optical alarm
Loud alarm tone and red flashing warning LED in the event of a gas leak.
Ready after approx. 3 minutes
The sensor warms up briefly, during which the green LED flashes.
Three status LEDs
Green for operation (Operate), yellow for fault (Error), red for alarm (Alarm).
Test button
Checks the LEDs and the acoustic alarm. In the event of an alarm it mutes the sound.
Pre-alarm and main alarm
First the red LED flashes as a pre-alarm; at a higher gas concentration the main alarm follows with the acoustic sounder.
Fault and cable-break indication
In the event of a fault the yellow LED flashes and the sounder sounds every 30 seconds.
Simple functional check
Commercially available lighter gas is sufficient for regular testing.
What is included in the box
The GX-B2pro is ready for immediate use. The device has no options and no additional variants.
- Gas alarm warning device GX-B2pro with external sensor and sensor cable
- Mounting material for the sensor
- Operating instructions
How the GX-B2pro is constructed
Main unit and sensor together form a system: the plug-in unit is inserted into the socket, the sensor is connected via the cable. The device contains no parts that you need to maintain and must not be opened.
Plug-in unit with housing
The main unit is plugged directly into a socket with its plug section, which also supplies it with power. It contains the electronics, the LEDs, the test button and the sounder. Avoid moisture, dust and direct sunlight.
External sensor
The sensor head is separate from the main unit and monitors the air where you mount it. It responds at a gas concentration far below the life-threatening level. You can fix it with the supplied mounting material.
Ventilation slots on the sensor
Room air reaches the sensor element through the slots in the sensor housing. Keep them clear and regularly blow away any dust.
Sensor cable with connector
The cable connects the sensor and the main unit. It is 2.5 m long and cannot be extended. In the event of a fault, check the cable and the connector on the sensor.
Ventilation slots on the main unit
The large slots in the housing of the plug-in unit ensure air exchange and allow the alarm tone to be heard outside.
Green LED (Operate)
It flashes during the warm-up phase. Afterwards it lights continuously and indicates operation and monitoring.
Yellow LED (Error)
It flashes in the event of a fault, for example a cable break.
Red LED (Alarm)
It flashes during pre-alarm and main alarm as long as gas is detected.
Test button
In monitoring mode you use it to check the LEDs and the acoustic sounder. In the event of an alarm it mutes the sound; the red LED continues to flash until no more gas is detected.
Correct placement and commissioning
The GX-B2pro may only be installed in dry indoor areas and must be positioned correctly depending on the type of gas to ensure proper function.
Where the sensor belongs
- Town gas and natural gas (methane): Mount the sensor 15 to 30 cm below the ceiling, no more than 4 m from the gas appliance. It must be located above the highest door or window opening in the room
- LPG (propane and butane): Mount the sensor 15 to 30 cm above the floor, no more than 4 m from the gas appliance
- Socket: The plug-in unit can be plugged into any suitable socket within the cable length; it does not need to be at the ideal height
Where the device must not be operated
- In locations that could prevent the alarm from being triggered 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, a ventilation opening, a fan or an air-conditioning unit
- In areas where dust or dirt could put the sensor out of operation
- In potentially explosive atmospheres
Commissioning
- Mount the sensor in the correct position and plug the main unit into a socket. The LED first lights up once in each colour and a short alarm tone is heard.
- The sensor now requires a warm-up time of approximately 3 to 5 minutes, during which the green LED flashes.
- Afterwards the green LED (Operate) lights continuously and the gas alarm is ready for operation.
- If an alarm is triggered immediately after the warm-up time (the LED flashes red), briefly disconnect the device from the mains and restart the warm-up time. This can occur after long storage or moisture during transport and may need to be repeated up to three times.
What the LEDs mean and how to test
Green flashing
Warm-up phase; the sensor is reaching its operating capability.
Green steady
Operation and monitoring. The gas alarm is ready.
Yellow flashing
Fault or cable break. The sounder also sounds every 30 seconds. Unplug the device and plug it back in and check the sensor cable and the connector on the sensor. If the fault persists, contact Elektrotechnik Schabus.
Red flashing
Pre-alarm or main alarm. During the main alarm the acoustic sounder also sounds.
Function test
In monitoring mode you test the LEDs and the acoustic sounder with the test button. A simple functional check of the sensor is also possible with gas from a commercially available lighter: from a distance of 10 to 15 cm, briefly release a short burst of gas towards the lower ventilation slots of the sensor without igniting the lighter. After approximately 30 seconds the gas alarm is triggered and the red LED flashes. Afterwards briefly disconnect the device from the mains and restart the warm-up time. The manufacturer recommends performing this test monthly.
What to do in the event of an alarm or gas odour?
Proceed in the following order:
- Do not unplug the gas alarm from the socket.
- Do not switch on any further electrical appliances.
- Do not light any naked flames and extinguish any open fires.
- Open windows and doors and thoroughly ventilate the room.
- Shut off the main gas supply and ensure that the cause of the gas leak is eliminated.
- In the event of a persistent or repeated alarm, contact your gas supplier or a qualified gas installation technician.
You can mute the alarm tone with the test button. This does not eliminate the danger; the red LED continues to flash until no more gas is detected.
When the sensitive sensor triggers without a gas leak
The sensor also responds to many other gaseous substances. Aerosols (propellant in sprays for hair, disinfection and similar), strong tobacco smoke such as from a smoking card game, cooking fumes and stored paint cans can lead to a false alarm.
What the gas alarm does not replace
- The GX-B2pro does not detect carbon monoxide (CO). You need a CO detector for that
- It is only approved for the described use, not for potentially explosive atmospheres
- It is intended for residential areas, sales areas and rooms of small businesses that are connected to the public low-voltage network
- The manufacturer is not liable for damage resulting from the fact that no alarm signal is given despite an elevated gas concentration
Cleaning, care and factory inspection
Cleaning and care
- Avoid moisture such as splash or rain water, dust and direct sunlight
- Clean the device only with a dry linen cloth, which may be slightly dampened in the case of heavy soiling
- Do not use solvent-based cleaning agents
- Regularly blow dust away from the sensor
- Do not open the device; it contains no parts that you need to maintain
Factory inspection of the sensor
For a comprehensive factory inspection of the sensor, observe the date (month/year) on the sensor. Then send it to Elektrotechnik Schabus GmbH & Co. KG, Baierbacher Str. 150, D-83071 Stephanskirchen, Germany.
Manufacturer’s notes
- Read the operating instructions carefully before installation and commissioning and keep them; they form part of the product
- Packaging material is not a toy and does not belong in children’s hands
- Do not open the device
- Use only in dry indoor areas, not in potentially explosive atmospheres
- Approved only for the described use
- Observe the prescribed position and obtain information about the gas type from the utility company
- The declaration of conformity is available for download on the manufacturer’s website
Warranty, guarantee and disposal
The GX-B2pro 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. Repairs and spare parts are available directly from the manufacturer, even beyond the statutory warranty. The prerequisite is that the device has been used in accordance with the operating instructions.
The GX-B2pro does not belong in household waste. The crossed-out wheeled bin symbol on the product reminds you to use the take-back systems so that the materials can be reused in an environmentally friendly manner at the end of their service life (WEEE Reg. No. DE91394868). Further information is available from your local waste advice centre or the manufacturer.
Why the GX-B2pro is suitable
Sensor in the right place
High up for natural gas, low down for LPG, independent of the socket height.
For all common fuel gases
Natural gas, town gas and LPG (propane and butane).
Early and clear warning
Acoustic alarm and red flashing LED, long before it becomes life-threatening.
Always in view
Three LEDs for operation, fault and alarm as well as a test button.
Well rated
5.0 out of 5 stars from 4 customer reviews. One customer praises that the warning tone is loud enough to be heard even from the basement on the first floor.
From the manufacturer
Made in Germany, personal expert advice without call centres, family business from Upper Bavaria since 1992, ISO 9001:2015 certified.
Service included
5-year guarantee registrable, repairs and spare parts directly from the manufacturer.
Areas of application
- Apartments with gas boilers
- Kitchens with gas cookers
- Heating and utility rooms
- Boiler rooms and technical rooms
- Basements and storage rooms with gas cylinders
- Gas cylinder cabinets
- Workshops
- Motorhomes and camping vehicles
- Holiday homes
- Sales areas such as shops and hypermarkets
The Schabus GAS ALARM GX-B2pro: plug in, position the sensor, stay safe.
Frequently asked questions
Which gases does the GX-B2pro detect?
It detects town gas, natural gas (methane) and LPG (propane and butane). It does not detect carbon monoxide (CO).
What is the purpose of the external sensor?
It is mounted via the cable directly where gas is produced or collects, regardless of the height of the socket. The main unit is plugged into the socket.
Where do I mount the sensor?
For natural gas and town gas 15 to 30 cm below the ceiling and above the highest door or window opening; for LPG 15 to 30 cm above the floor. In both cases no more than 4 m from the gas appliance.
Can I extend the sensor cable?
No. The sensor cable is 2.5 m long and cannot be extended.
How long does it take until the gas alarm is ready for operation?
After plugging in, the sensor warms up for approximately 3 to 5 minutes, during which the green LED flashes. Afterwards it lights continuously and the gas alarm is ready for operation.
Immediately after the warm-up time the red LED flashes. Is the device defective?
Not necessarily. After long storage or moisture during transport an alarm may be triggered immediately after the warm-up time. Briefly disconnect the device from the mains and restart the warm-up time. This may need to be repeated up to three times.
Can I switch off the alarm tone?
Yes, with the test button you mute the alarm tone. The red LED continues to flash until no more gas is detected. Ventilate, shut off the gas supply and follow the instructions for behaviour in the event of an alarm.
How do I test the GX-B2pro?
With the test button you check the LEDs and the acoustic sounder. For a functional check of the sensor, from a distance of 10 to 15 cm briefly release a short burst of gas from a lighter (without igniting it) towards the lower ventilation slots of the sensor. The manufacturer recommends this test monthly.
What does it mean if the yellow LED flashes?
The device has detected a fault or a cable break; the sounder also sounds every 30 seconds. Unplug the gas alarm and plug it back in and check the sensor cable and the connector on the sensor. If the fault persists, contact Elektrotechnik Schabus.
Can false alarms occur?
Yes, the sensitive sensor also reacts to other gaseous substances, e.g. propellant in sprays, strong tobacco smoke, cooking fumes and stored paint cans.
How do I clean the gas alarm?
Regularly blow dust away from the sensor and wipe the device only with a dry linen cloth; in the case of heavy soiling it may be slightly dampened. Do not use solvent-based cleaning agents.
Does the gas alarm also detect carbon monoxide?
No. The GX-B2pro has no sensitivity to carbon monoxide. Use a CO detector for that.
Are there options or additional variants?
No. The GX-B2pro has no options. With sensor, sensor cable, mounting material and operating instructions it is complete.
How long is the guarantee valid?
The statutory warranty of at least 2 years applies in the EU. In addition, the manufacturer Schabus offers a 5-year guarantee that can be registered online.
Questions about the GAS ALARM GX-B2pro?
Our support team in Germany will advise you free of charge on selection, installation and configuration.
GAS ALARM GX-B2pro
The GX-B2pro is a catalytic gas sensor designed for the detection of combustible gases. It reliably detects methane, butane, propane, ethanol, and hydrogen, but is not sensitive to carbon monoxide (CO).
Technical Data
- Operating voltage: 230 V AC ±10 %, 50–60 Hz
- Power consumption: up to approx. 3 VA, depending on operating state
- Protection class: IP 20
- Buzzer sound pressure: > 80 dB(A) @ 1 m (main alarm)
- LED indicators:
- green flashing: preheating phase approx. 3 minutes
- green steady: operation / monitoring
- yellow flashing: fault, cable break, etc.
- red flashing: pre-alarm / main alarm
- Pre-alarm: 3 % LEL (Lower Explosive Limit)
- Main alarm: 10–20 % LEL
- Sensor type: catalytic
- Operating range (sensor): -10 °C to +50 °C
- Storage temperature (sensor): -20 °C to +70 °C
- Ambient humidity: 5–90 % RH, non-condensing
- Sensor test interval: approx. 5 years
- Dimensions (device) (H×W×D): 118 × 60 × 44 mm
- Dimensions (sensor) (H×W×D): 52 × 27 × 29 mm
- Cable length: 2.5 m, not extendable
- Cable diameter: 3.5 mm
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
