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Gas Detection and Alarm Systems

Gas Detection and Alarm Systems

Product catalog summary

Overview
The document provides a comprehensive guide on gas detection and alarm systems for industrial use, focusing on the V3 series and its variants. These systems are designed for various installations, including panel instrumentation, floor type, and wall mount type, incorporating indicator and alarm units.

System Configuration
The V3 series gas detection and alarm systems are compact and flexible, allowing for the combination of indicator units, alarm units, and various gas detector heads. They can be configured for single or multi-point monitoring, suitable for detecting combustible gases, toxic gases, and oxygen levels.

Detection Principles
The systems utilize various detection principles, including hot wire semiconductor, catalytic combustion, electrochemical cell, thermal conductivity, and galvanic cell. These principles are applied based on the target gas, such as combustible gases (LPG, CH4), NH3, H2, Helium, Argon, CO2, and oxygen.

Alarm Types and Stages
The systems feature two-stage alarms, with the first stage indicating a warning and the second stage indicating a critical level. The alarms are visually represented through a 3-color LED bar graph and are accompanied by audible signals.

Specifications
The document details the specifications for the V3, V2, and V series, including power consumption, operating temperature, dimensions, and weight. The systems are designed to operate within a temperature range of -10 to 40 degrees Celsius and a humidity range of 10 to 90% RH.

Features
Key features include maintenance mode, which allows for maintenance work without triggering alarms, and the ability to replace units in existing systems. The systems also offer options for alarm delay, low flow rate alarm, and peak hold functions.

Applications
The systems are suitable for various industrial applications, including monitoring for gas leaks, preventing gas explosions, poisoning, and oxygen deficiency. They are designed to be earthquake-resistant and can operate during power failures with backup power supply options.

Conclusion
The V3 series gas detection and alarm systems provide a reliable and flexible solution for industrial gas monitoring, with advanced features and customizable configurations to meet specific safety requirements.

NV Series Overview
The document also covers the NV Series Gas Detection & Alarm System, designed for hydrogen fueling stations and other environments requiring gas monitoring. It includes information on various models, detection principles, alarm settings, and power requirements.

Specifications
The NV Series includes models like NV-400, NV-410, and NV-600HS, each with specific detection capabilities and alarm settings. The systems are designed to detect gases at low concentrations, focusing on hydrogen selectivity using a hot wire semiconductor sensor covered by a silica-film for molecular sieving.

Alarm and Indication
The systems feature multi-stage alarms with visual and auditory indicators. Alarms are triggered at specific gas concentration levels, with red lamps and buzzers indicating different stages. The systems allow for alarm set value adjustments and have a response time of 30 seconds or less under test conditions.

Power and Backup
The systems operate on a range of power sources, including 85-264V AC and 24V DC. Backup power is provided by sealed lead acid batteries, ensuring operation during power failures. The systems include overdischarge prevention and battery life check functions.

Installation and Maintenance
The document outlines installation procedures for both diffusion and extractive type gas detector heads. It emphasizes the importance of proper installation for effective gas detection and provides guidelines for maintenance, including zero and span adjustments.

Applications
The NV Series is suitable for various environments, including hydrogen fueling stations, semiconductor plants, and clean rooms. The systems are designed to be explosion-proof and water/dust resistant, making them ideal for hazardous areas.

Additional Features
The systems include features like a clear flowing lamp for gas alarms, automatic backup operation during power failures, and easy-to-replace sensor units. They are compact and lightweight, facilitating easy installation and integration into existing monitoring setups.

Specifications and Features
The document outlines the specifications and features of various gas detectors. Key features include a digital display, simple installation, rugged design, and environmental friendliness. The detectors use different sensor types such as non-dispersive infrared, electrochemical cells, and galvanic cells. They are approved under various standards including ATEX and CE Marking, with some models achieving SIL2 certification.

Detection Principles and Target Gases
The detectors employ various detection principles like thermal conductivity, catalytic combustion, and hot wire semiconductor sensors. They are designed to detect combustible gases, toxic gases, and oxygen concentration. The detection range varies by model, with some capable of detecting up to 100% LEL for combustible gases and specific ppm ranges for toxic gases.

Alarm and Operation
Alarm accuracy for combustible gases is within ±25% of the set value, and for toxic gases, it is within ±30%. The alarm delay is within 30 seconds for combustible gases and 60 seconds for toxic gases. The operation is facilitated by magnetic switches, and the detectors have a degree of protection rated at IP65.

Power and Dimensions
The detectors operate on a 24V DC power supply with a maximum power consumption of 7.5W. Dimensions and weight vary by model, with some models weighing approximately 5.2kg.

Environmental Conditions
The operating temperature range is -10 to 50ºC, with humidity levels between 10 to 90% RH. The detectors are designed to withstand no radical changes in temperature or humidity and prevent condensation.

Sensor Types and Applications
The document details various sensor types used in the detectors, including hot wire semiconductor, catalytic combustion, and electrochemical cells. Each sensor type has specific features such as high sensitivity, long service life, and selective sensitivity to certain gases.

Installation and Options
Different mounting options are available for the detectors, including wall and floor mounts. The document also lists various sampling unit parts and accessories like flow checkers and auto-drain filters.

Conclusion
The document provides comprehensive technical details on gas detectors, highlighting their specifications, features, and applications. It emphasizes the importance of selecting the appropriate sensor type and model based on the target gas and environmental conditions.

Catalog excerpts

Gas Detection & Alarm Systems for Industrial Use PRODUCT GUIDE

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System Configuration Gas detection & alarm system V3 series are compact systems which can flexibly combine with indicator units, alarm units, and various gas detector heads. Indicator Unit / Alarm Unit V3 seriesIndicator Unit Alarm Unit V2 seriesIndicator Unit Alarm Unit V3 type VAS Indicator Unit VP-P-^_ Alarm Unit VAL The photo shows single case specification The photo shows single case specification Floor Type The compact floor type system which panel is equipped with single cases incorporating indicator units and alarm unit. ^ Single Case for Panel Instrumentation Each single case...

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Multi-Point Type Applicable Detector Head Model

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Multi-Point Type Indicator Unit/ Alarm Unit Outline An indicator unit supplies power to the gas detector head and processes the signals from the detector. It displays the gas concentration in 3-color LED bar-graph, it will activate the alarm automatically at alarm set value and transmit the signals to the alarm unit and external output devices (contact output, analog output). Part Names The alarm unit receives the signals (non-contact output) from V3 series indicator unit, displays the alarm (buzzer and lamp), and outputs control contacts to external devices. V3 series POWER Lamp TROUBLE Lamp...

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Multi-Point Type V/ V2 Series Specifications Model Detection Range Gas Concentration Display Alarm Set Value Alarm Accuracy Response Time Alarm Indication External Output Analog Output Alarm Delay Circuit Operating Temperature Power Source Power Consumption Dimensions Depends on the detector specifications LCD bar graph Adjustable within the detection range Combustible gas: Within +/-25% of alarm set value Toxic gas: Within +/-30% of alarm set value Oxygen: Within +/-1.0vol% of alarm set value Combustible gas: Within 30s at 160% gas concentration of alarm set value Toxic gas: Within 60s at 160%...

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Terminal arrangements Alarm unit dimensionsPanel cutout dimensions 1 For one-by-one instrumentation For multi-point close instrumentation Indicator unit dimensions Terminal arrangements 1 (Front side of a panel) Floor Type V-830Outline Use example V-830 gas detector is a compact floor type system of which panel is equipped with single cases incorporating indicator units and an alarm unit, and is best suited for multi-point monitoring.

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Multi-Point Type Outline ■ V-810 gas detector is a compact system of wall (panel) mount type which combines indicator units, an alarm unit, and various gas detector heads of the V series. ■ Detects combustible gases, toxic/specialty gases, and oxygen (oxygen deficiency) and gives an alarm signal when the gas concentration goes over a set value (or under a set value for oxygen deficiency), so as to prevent gas accidents such as gas explosion, poisoning, and oxygen deficiency. ■ VB-810 incorporates a backup power supply unit. FEATURES I Compact design. ■ Standard cases for 3/6/9/12/15/18/21 points...

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Multi-Point Type Gas Detection & Alarm System NV Series System Configuration FEATURES Monitors gas leakage even during a power failure or other lifeline failures.(on models with a built-in backup power supply) Continuously monitors for 30 minutes after a power failure, then intermittently monitors for 2 days. The interval between observations depends on the number of detection points. (NV500) Continuously monitors for 30 minutes after a power failure. (NV-400/410/600HS) Operated normally in a seismic qualification test equal to intensity of 7 on the Japanese earthquake scale. Earthquake-resistant...

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Multi-Point Type Combustible gas Catalytic combustion sensor Hot wire semiconductor sensor ■ Options (sold separately) External buzzer ■ Options (sold separately) External buzzer ■ Options (sold separately)

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Model Item Town gas, Industrial gases Detection & Alarm System NV-400/NV-410 Specifications Model Item Detection Principle *1 Also usable for other gases.

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Multi-Point Type Deffusion type gas detector head KD-14 Extractive type gas detector head PD-14 Deffusion type gas detector head KD-14 Extractive type gas detector head PD-14

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Multi-Point Type Gas Detection & Alarm System NV-600HS Gas Detection System for Hydrogen Fueling Station Indication Alarm Multi-point type gas detection system to monitor the leakage at hydrogen fueling stations FEATURES Displays gas concentration during gas alarm on bar graph. Maintains normal operating condition under seismic test. Keeps monitoring for over 30 minutes at electric power failure * Indication Alarm * For backup battery specifications. Specifications of Indication Alarm Model 2 points per unit As per specifications LCD bar graph with backup light As per specifications +/-25% of...

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Multi-Point Type Combustible gas Thin and compact designed detector Catalytic combustion sensor Hot wire semiconductor sensor Hydrogen explosion-proof detector Easy to replace unit type gas sensor Water and dust proof structure (Degree of Protection: IP65) Approvals: Ex d IIC T5 Early detection of hydrogen leakage near the ceiling is possible with thin design. Easy to replace unit type gas sensor Approvals: Ex d IIB + H2T4 Water and dust proof structure (Degree of Protection: IP65) ! CHECK Installation example of gas detector at connecting of coupling. It requires to detect under 1000ppm (0.1%)....

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Type Explanation Nv-ioon FEATURES I Full maintenance functions with very easy zero and span adjustment. I Proven reliability with years of experience - COSMOS gas sensors have a small zero drift, a small sensitivity decrease, and a long life. I Zero suppression function cancels slight fluctuations of the reading due to environmental change. I Compact Indicator/Alarm unit - W113xH204xD71.5mm, approx. 1.5kg. I Battery provides backup power in case of a power failure, allowing continuous monitoring over 60 minutes after the failure. (option) Indicator/Alarm Unit Specifications Model Terminal Arrangements...

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One-Point Type Indicator/Alarm Unit Gas Detector Head Model Sampling Method Explosion-Proof Structure Cable Detection Principle For combustible gas (High sensitivity) Catalytic Combustion Sensor Sampling Method Explosion-Proof Structure Cable Catalytic Combustion Sensor Detection Principle Hot Wire Semiconductor Sensor Hot Wire Semiconductor Sensor Sampling Method Explosion-Proof Structure Cable Detection Principle CVVS-2C Electrochemical Cell Sensor Electrochemical Cell Sensor Extractive/ Eductor * With a Zener barrier Model Sampling Method Explosion-Proof Structure Cable Detection Principle...

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