Gas detector DEX-31/N-Nstd organic vapors, custom calibration, F4-B design, p-p sensor, brass housing DEX-31/N-NSTD

Gas detector for monitoring organic compound concentrations

The DEX-31/N gas detector is an advanced device designed for continuous monitoring of hazardous concentrations of organic compounds in the air. Its explosion-proof construction, ATEX certification, and compatibility with various control modules make it an ideal solution for both industry and public utility facilities. The device signals exceeding two alarm thresholds, ensuring a quick response in case of danger.

Construction and application

Detectors of the DEX/F series, including the DEX-31/N model, are used in enclosed spaces where there is a risk of explosive or toxic gases. They are particularly useful in the chemical, petrochemical, and mining industries, as well as in ventilation and air conditioning systems. Thanks to its modular design and interchangeable sensor modules, the detector is easy to operate and maintain. The possibility of custom calibration allows the device to be adapted to the specific needs of the user. The housing made of brass provides high resistance to corrosion and mechanical damage.

Key features and benefits

• Safety: Meets the requirements of the ATEX Directive, guaranteeing safe use in explosion-hazardous zones (IIA, IIB, IIC; T1-T6).
• Replaceable sensors: Allow for quick replacement of a damaged sensor or adaptation to another type of gas – reducing operating costs.
• Measurement accuracy: Built-in thermal and linear compensation algorithms ensure accurate measurement results regardless of environmental conditions.
• Modularity: Compatibility with various control modules (MD-1.A/T, MD-1, MD-2, MD-4, MDP-1.A/T, MDP-1 PLUS, MDP-4, MDP-8, MDP-16 and MDD-1, MDD-1/T, MDD-1x/T) facilitates integration with existing gas detection systems.
• Calibration: The possibility of custom calibration ensures optimal measurement accuracy for specific applications.
• High quality: Detectors are calibrated in their own GAZEX Calibrating Laboratory accredited according to PN-EN ISO/IEC 17025 (PCA No. AP150).
• Durability: Brass construction provides resistance to corrosion and mechanical damage.

Technical specifications

The device has two bistable (threshold) outputs and is powered by the control system. Its compact dimensions (105 x 103 x 54 mm) allow for easy mounting in various locations. The semiconductor sensor reacts to organic compounds in the range of 5–40% LEL (Lower Explosive Limit). Alarm threshold values are set during production and can be adjusted to individual customer needs during custom calibration.