Gas detector DEX-A73/N hydrogen (selective) 10/30% LEL, A4-C design, p-p sensor, brass housing

Hydrogen gas detector DEX-A73/N – reliable protection against hydrogen

The DEX-A73/N gas detector is an advanced device designed for continuous monitoring of hydrogen concentration in enclosed spaces. Thanks to its selective sensor, the detector provides precise measurements and a quick response to hazards, which is crucial in applications requiring a high level of safety. The device is used in battery rooms, laboratories, industrial halls and other facilities where there is a risk of hydrogen leakage.

The detector is designed to work with various control modules, such as MDP-1.A/T, MDP-1 PLUS, MDD-1 or MD-1, which provides flexibility and ease of integration with existing gas detection systems. It has a standard 4-20mA output signal, allowing connection to a wide range of alarm centers. The explosion-proof design allows for safe use in areas threatened by gas explosions (IIA, IIB, IIC), and the ATEX certificate confirms compliance with European safety standards.

Key features and applications:

• Selective hydrogen measurement: The detector is designed specifically to detect hydrogen (H₂), minimizing the risk of false alarms caused by other gases.
• Measurement range 10/30% LEL: Allows monitoring of hydrogen concentration in a wide range, adapted to various industrial applications.
• A4-C design with brass housing: Ensures high durability and resistance to corrosion and mechanical damage. The brass housing is particularly recommended in harsh environmental conditions.
• Alarm threshold exceedance signaling: The detector signals exceeding two set alarm thresholds (A1, A2), allowing for a quick response in case of danger.
• 4-20mA interface: Enables easy integration with control and monitoring systems.
• Application in EX zones: Possibility of operation in areas threatened by gas explosions (IIA, IIB, IIC) thanks to the explosion-proof design and ATEX certificate.
• Dedicated to battery rooms: Particularly useful in rooms with batteries, where hydrogen may be released during charging.

Construction and mounting:

The DEX-A73/N detector is characterized by a solid construction and ease of mounting. Compact dimensions (105 x 103 x 54 mm) allow installation in places with limited space. The device is adapted for wall or ceiling mounting. Proper placement of the detector is important – according to the manufacturer's recommendations, avoid places exposed to direct exposure to atmospheric factors or obstacles hindering air flow. In the case of battery rooms, it is recommended to mount the detector in the upper part of the room due to the lightness of hydrogen and its tendency to accumulate under the ceiling.

Compliance with standards and operating conditions:

The detector meets the requirements of Directive 2014/34/EU (ATEX) and standards PN-EN 60079-0:2013-03+A11:2014-03 and PN-EN 60079-1:2014-12. The device can operate at a temperature from -30°C to +50°C and has a protection class of IP65/IP6X, which ensures resistance to dust and moisture. Regular calibration (recommended period of 12 months) is essential to ensure the accuracy of measurements and reliable operation of the detector.