Do you have an account?
Log in, so that checkout is faster.
Availability for pickups could not be loaded
Item number: 300253
Delivery time: 2-3 working days
View full details
Scope of delivery
CO₂ Alarm GX-D250 – Precise indoor air monitoring with external sensor and relay output
The GX-D250 CO₂ warning device is a professional solution for permanent installation in indoor spaces with regular human presence – such as classrooms, offices, or meeting rooms – and was developed to encourage timely ventilation and thus maintain a healthy air quality at a sustainable level. With a low pre-warning threshold starting at 800 ppm CO₂, the device provides early warning of rising CO₂ concentrations. An easy-to-read plain-text display shows the measured values precisely in ppm, accompanied by understandable instructions such as "Please ventilate." At the same time, a subtle warning tone supports the recommendation to supply fresh air. At a CO₂ level of 2500 ppm, a potential-free changeover relay is activated, for example, to trigger automatic forced ventilation.
The system is based on an external NDIR infrared sensor with a particularly long service life, which is continuously monitored by two microcontrollers. This ensures precise measurements with high repeatability. The sensor is pre-assembled and connected to the warning device via a 2.5 m long cable, allowing it to be optimally positioned in the room independently of the device unit – ideally at average nose height of the people present. The mounting height directly influences the sensor sensitivity: the higher the measurement, the more tolerant the system reacts, while the lower the sensor is correspondingly more sensitive.
In addition to continuous CO₂ measurement, the GX-D250 logs numerous operating parameters on the display and saves them for traceability. A second relay also protects against technical malfunctions—such as a cable break—by forwarding the alarm to a building management system. Digital transmission of the measurement data via pulse-width modulation ensures precise interpretation of CO₂ concentrations within the warning device itself.
The factory-set main alarm threshold of 2500 ppm is based on half the maximum permissible workplace concentration (MAK) for CO₂, but can be customized by Elektrotechnik Schabus upon request. However, this model is not suitable for applications with significantly higher CO₂ concentrations from technical processes or when handling dry ice. In these cases, the GX-D500P , with significantly higher alarm thresholds at 15,000 ppm and 30,000 ppm, is recommended.
https://youtu.be/rtyMkpKwL7s?si=tbQou1114O-J3lsg
WEEE NO.: DE91394868
| Operating voltage | 100-240 volts AC/50-60 Hz |
|---|---|
| Functional area | 0°C/+40°C |
| Protection class | IP54 |
| Dimensions(WxWxD) | |
| Power consumption | 10VA max. |
| Relay contact | 2 potential-free changeover contacts, changeover contact NC/NO |
| Life | {"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Sensor ca. 8-10 Jahren (90% der Sensoren)"}]},{"type":"paragraph","children":[{"type":"text","value":"*Angaben zur Lebensdauer beruhen auf Herstellererfahrung und stellen keine Garantie\\n dar sondern dienen dem Vergleich. Infrarotsensoren sollten regelmäßig getestet und wöchentlich ca. 30 Minuten in Frischluft rekalibiert werden. Bei idealen Umgebungsbedingungen können Sensoren auch längere Lebensdauer erreichen."}]}]} |
| Line | 2.5m | 2×0.14mm2 | white |
| Humidity | 10% – 90% rH, non-condensing |
| Trigger concentration | > 1000 ppm CO2 pre-alarm, > 2500 ppm CO2 main alarm, 800 ppm CO2 |
| Sound pressure level | 90 dB (10 cm distance) |
| Sensor | external, NDIR infrared, optical, absorption |
| Sensor operating voltage | braun 9-30VDC, grün GND, weiß Sensor PWM |
Scope of delivery
CO₂ Alarm GX-D250 – Precise indoor air monitoring with external sensor and relay output
The GX-D250 CO₂ warning device is a professional solution for permanent installation in indoor spaces with regular human presence – such as classrooms, offices, or meeting rooms – and was developed to encourage timely ventilation and thus maintain a healthy air quality at a sustainable level. With a low pre-warning threshold starting at 800 ppm CO₂, the device provides early warning of rising CO₂ concentrations. An easy-to-read plain-text display shows the measured values precisely in ppm, accompanied by understandable instructions such as "Please ventilate." At the same time, a subtle warning tone supports the recommendation to supply fresh air. At a CO₂ level of 2500 ppm, a potential-free changeover relay is activated, for example, to trigger automatic forced ventilation.
The system is based on an external NDIR infrared sensor with a particularly long service life, which is continuously monitored by two microcontrollers. This ensures precise measurements with high repeatability. The sensor is pre-assembled and connected to the warning device via a 2.5 m long cable, allowing it to be optimally positioned in the room independently of the device unit – ideally at average nose height of the people present. The mounting height directly influences the sensor sensitivity: the higher the measurement, the more tolerant the system reacts, while the lower the sensor is correspondingly more sensitive.
In addition to continuous CO₂ measurement, the GX-D250 logs numerous operating parameters on the display and saves them for traceability. A second relay also protects against technical malfunctions—such as a cable break—by forwarding the alarm to a building management system. Digital transmission of the measurement data via pulse-width modulation ensures precise interpretation of CO₂ concentrations within the warning device itself.
The factory-set main alarm threshold of 2500 ppm is based on half the maximum permissible workplace concentration (MAK) for CO₂, but can be customized by Elektrotechnik Schabus upon request. However, this model is not suitable for applications with significantly higher CO₂ concentrations from technical processes or when handling dry ice. In these cases, the GX-D500P , with significantly higher alarm thresholds at 15,000 ppm and 30,000 ppm, is recommended.
https://youtu.be/rtyMkpKwL7s?si=tbQou1114O-J3lsg
WEEE NO.: DE91394868
| Operating voltage | 100-240 volts AC/50-60 Hz |
|---|---|
| Functional area | 0°C/+40°C |
| Protection class | IP54 |
| Dimensions(WxWxD) | |
| Power consumption | 10VA max. |
| Relay contact | 2 potential-free changeover contacts, changeover contact NC/NO |
| Life | {"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Sensor ca. 8-10 Jahren (90% der Sensoren)"}]},{"type":"paragraph","children":[{"type":"text","value":"*Angaben zur Lebensdauer beruhen auf Herstellererfahrung und stellen keine Garantie\\n dar sondern dienen dem Vergleich. Infrarotsensoren sollten regelmäßig getestet und wöchentlich ca. 30 Minuten in Frischluft rekalibiert werden. Bei idealen Umgebungsbedingungen können Sensoren auch längere Lebensdauer erreichen."}]}]} |
| Line | 2.5m | 2×0.14mm2 | white |
| Humidity | 10% – 90% rH, non-condensing |
| Trigger concentration | > 1000 ppm CO2 pre-alarm, > 2500 ppm CO2 main alarm, 800 ppm CO2 |
| Sound pressure level | 90 dB (10 cm distance) |
| Sensor | external, NDIR infrared, optical, absorption |
| Sensor operating voltage | braun 9-30VDC, grün GND, weiß Sensor PWM |
