DEGA NS II LCD – Gas Detector

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Product Description

DEGA NS II LCD detector is a part of the gas detection system. Detector is located in monitored premises in which critical situations due to accumulation of flammable or toxic substances can occur. Detector converts the measured concentration of substances into a unified signal 4 – 20mA and RS485. The detector has an LCD display to show measured concentrations of detected substances in real time, and it is equipped with 4 relays. The detector can be connected to control panels DEGA UPA III, DEGA UKA III and DEGA UDA III.

A gas transmitter for industrial environments (ATEX) and for the “EX” environment (Zone 2)

Basic Gas Detection Methods:

CL – catalytic sensor (Pelistor)
Works on the principle of catalytic combustion – the gas concentration is measured in accordance with the amount of heat released during a controlled combustion reaction. The reaction is prompted by a suitable temperature and the presence of a catalyst. These sensors can be used for the detection of a wide range of combustible gases. The sensors are characterised by their fast response, long life and high degree of stability. For their proper functioning they require at least 10% of the oxygen in the air. The transmitter sensor is sensitive to compounds of silicon, the introduction of which can result in poisoning of the sensor.

EL – electrochemical sensor
This operates on the principle of measurement of the change in the electrical parameters of electrodes placed in electrolyte, due to the redox reaction of detected gas on their surface. These sensors have a favourable selectivity and the capacity to detect very low concentrations of gases. In the DEGA systems they are utilised primarily for the detection of toxic gases.

IL – infrared sensor
The highest-quality detecting method, which works on the principle of infrared spectroscopy. These sensors excel in the high level of their selectivity and their resistance in environments containing corrosive substances. The sensors have a very long life (10+ years).

SL – semiconductor sensor
The least expensive method of sensing works on the principle of the measurement of the change in the electrical conductivity of semiconductors that occurs in the event of a change in the concentration of the gas detected. Its advantages are its long operating life when it is used in a clean environment and also the wide range of models available for different types of gases and vapours. Its disadvantages are its low degree of selectivity (a lesser ability to distinguish between the different types of gases in the mixture) and in environments containing corrosive substances (alkaline and acidic compounds, silicones, sulphur compounds, etc.) an accelerated degradation of the sensor takes place.

PID – photoionization sensor
Typical photoionization detectors measure volatile organic compounds and other gases in concentrations from sub parts per billion to 10 000 parts per million (ppm). The photoionization detector is an efficient and inexpensive detector for many gas and vapor analytes. PIDs produce instantaneous readings, operate continuously, and are commonly used as detectors for gas chromatography or as hand-held portable instruments. Hand-held, battery-operated versions are widely used in military, industrial, and confined working facilities for health and safety. Their primary use is for monitoring possible worker exposure to volatile organic compounds (VOCs) such as solvents, fuels, degreasers, plastics & their precursors, heat transfer fluids, lubricants, etc. during manufacturing processes and waste handling.

With over 40 years as an industrial equipment supplier JWII has a profound depth of knowledge in the space of analytical instrumentation and related solutions. We help and advise clients to navigate a broad spectrum of products their uses in industry to meet process control and sustainability goals . Our advanced array of tools, synergized with our team of specialists, enables us to deliver solutions of significant impact. With a legacy marked by consistent achievements, we hold in high regard our steadfast dedication to catering to an international clientele spanning diverse industries and geographies.

Our Premier Suite of Services Encompasses:

  • Installation: Precision-driven integration tailored to specific requirements.
  • Routine Maintenance: Ensuring systems’ longevity and optimal performance through regular oversight.
  • Repairs and Upgrades: Proactive identification and rectification of system inefficiencies, bolstered by the latest technological advancements.
  • Modifications to Current Installations: Adapting existing systems to align with evolving client needs.
  • Emergency Response Repairs: Prompt and efficient solutions for unforeseen system challenges.
  • Commissioning: Comprehensive system design, installation, testing, and maintenance to meet exacting operational standards.
  • On-site Assistance: Dedicated field teams providing hands-on support, ensuring seamless operations irrespective of challenges.
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