Explosion-proof sensor carbon dioxide (CO2)

Explosion-proof sensor with built-in datalogger to measure carbon dioxide (CO2) in ambient air as well as temperature, humidity and atmospheric pressure.

The Ex sensor CO2 lets you measure the quantity of carbon dioxide (CO2) in ambient air as well as the relative humidity, temperature and atmospheric pressure via an USB connection. It can record the measurements on its internal flash for later retrieval when connected again by USB.

This device is ideal to precisely monitor the air quality in residential, commercial and industrial spaces, as well as potentially dusty air ducts used in HVAC (Heating Ventilation and Air Conditioning) systems. The sensor used in this device uses non-dispersive infra-red absorption (NDIR), and requires no maintenance. It provides accurate measurements already within the first minute after power on.

The expected CO2 concentration in fresh air varies between 360 and 400 ppm depending on the location. Industry consensus standard rates maximal admissible CO2 between 1'000 and 2'500 ppm in ventilated buildings. Around 10'000 ppm, some people feel dizziness. This sensor is capable to measure up to 40'000 ppm (vol) or 4%, with a well-defined accuracy in the range 0...10'000 ppm (25°C).

Its typical accuracy is of:

• 0.5°C for temperature,

• 3% RH for the humidity rate, 

• 0.01mbar for the atmospheric pressure variations.

This device can be connected directly to an Ethernet network, to a WiFi network and to a GSM network using special adapters.

Note: To use the Ex sensor CO2 in a hazardous area, the Ex sensor CO2 must be protected to at least IP 65, so it must be placed inside the enclosure.

Ex sensor CO2 don’t require any special drivers or software. Compatible with Windows, Mac OS, Android and Linux and easy to drive from a maximum of programming languages.

The Ex sensor CO2 is connected through an industrial USB 2.0 connector to an intrinsically safe barrier Ex USB 2.0.

The Ex sensor CO2 have a “hot-plug” function which allows them to be connected and disconnected without stopping, shutting down or rebooting the system.

Specifications:

USB connector: micro-B

Thickness: 9mm

Width: 58mm

Length: 50mm

Weight: 13.5g

Sensor: SCD30 (Sensirion), ICP-10100 (TDK)

Refresh rate: 0.5Hz

Measuring range: 0-40000ppm (vol)

Accuracy: 30 ppm + 3%

Accuracy (H): 3% RH

Accuracy (P rel): 0.01mbar

Accuracy (T): 0.5°C

Sensitivity: 10 ppm

Protection class, according to IEC 61140: class III

Supported Operating Systems: Windows, Linux, Mac OS, Android

Сompliance: IP 65, RoHS

Electrical Data:

Uo=5 V

Io=50 mА

Ui=5 V

Ii=50 mА

Ci=10 µF

Ex marking:

Ex ib I Mb

Ex ib IIC T6...T4 Gb X

Ex tb IIIC T85°C...135°C Db

Produced in accordance with 

IEC 60079-0, IEC 60079-11, IEC 60079-31

Normal operating temperature: 5°C to 40°C

Extended operating temperature*: 0°C to 50°C

*Note: The extended temperature range is defined based on components specifications and has been tested during a limited duration (1h). When using the device in harsh environments for a long period of time, we strongly advise to run extensive tests before going to production.