Gas Detection &
Alarm System Design
Specialist gas detection and alarm system design for commercial, industrial, residential and hospitality buildings — combustible, toxic and oxygen-deficiency gas detector placement, panel design and IEC 60079 / NBC India compliant documentation.
What We Offer
Gas detection systems are critical life-safety installations in any building where gas leaks can endanger occupants or create explosive atmospheres. ASDV Consultant provides professional gas detection and alarm system design services covering combustible gases (LPG, natural gas, CNG, hydrogen), toxic gases (CO, CO2, H2S, NH3, Cl2) and oxygen-deficiency monitoring.
Our designs cover all building types where gas detection is mandatory or recommended: commercial kitchens, car parks (CO monitoring), boiler rooms, generator rooms, LPG storage areas, laboratories, hospitals, data centres (refrigerant leak detection), industrial plants and confined spaces. Each application requires specific gas types, sensor technologies (catalytic bead, electrochemical, infrared, photoionisation) and response actions.
Every gas detection design is accompanied by a Cause and Effect (C&E) matrix defining the system's response at each alarm level — including audible/visual warnings, HVAC shutdown, solenoid valve closure, access control lockout and evacuation signalling — coordinated with fire alarm and building management systems.
Why Choose ASDV?
- Certified ELV design consultants with 10+ years experience
- AutoCAD & Revit BIM deliverables for seamless coordination
- Full compliance with Indian & international standards
- Transparent pricing with detailed BOQ and specifications
- Pan-India service with international project capability
Design Deliverables
Detector Placement Drawings
Floor plans showing gas detector positions, alarm panel locations, cable routes and zone schedules for each gas type and location.
Cause & Effect Matrix
Alarm level response matrix defining actions (HVAC shutdown, valve closure, evacuation) at each threshold (10% LEL warning, 20% LEL alarm, toxic TWA/STEL).
System Architecture Diagram
Panel topology, detector loop/zone configuration, relay output wiring and interface to BMS, fire alarm and HVAC systems.
Bill of Quantities (BOQ)
Itemised material and installation quantities for competitive tendering.
Technical Specifications
Detector type, sensing technology, range, accuracy, response time, IP rating and cable specifications.
Compliance Documentation
Design compliance matrix against IEC 60079, EN 50104, NBC India and applicable ATEX zone classification requirements.
What's Included
Our Design Process
Hazard Identification
Identify gas types, potential leak sources, occupancy patterns and applicable standards based on building type and jurisdiction.
Area Classification
Define ATEX/hazardous area zones, required detector types and equipment protection levels (EPL).
Detector Placement Design
Position detectors based on gas density (heavier/lighter than air), ventilation patterns, leak source proximity and code coverage requirements.
System & Panel Design
Specify control panel, relay outputs, alarm levels, solenoid valve interfaces and BMS/fire alarm integration.
C&E Matrix & BOQ
Prepare cause & effect matrix, itemised BOQ and vendor-neutral technical specifications.
Tender & Commissioning
Support tendering, review submittals, witness bump testing and calibration during commissioning.
Standards & Codes We Design To
Frequently Asked Questions
We design gas detection systems for: combustible gases (LPG, natural gas, methane, hydrogen, CNG), toxic gases (carbon monoxide, hydrogen sulphide, ammonia, chlorine, NO2), oxygen deficiency, refrigerant gases (R134a, R410a, HFCs for data centres and cold stores), and car park CO/NO2 monitoring systems. Each gas type requires a specific sensor technology and placement strategy.
In car parks, CO and NO2 detectors are positioned at breathing height (approximately 1.5m above floor level) to measure the concentration of exhaust gases from vehicles. Detector spacing is typically 10–15 metres in each direction, with additional detectors near entry/exit ramps where CO concentrations are highest. The detection system interfaces with the car park ventilation fans to activate jet fans and extract fans when thresholds are exceeded.
The Lower Explosive Limit (LEL) is the minimum concentration of a flammable gas in air at which an ignition source can cause an explosion. Gas detectors for combustible gases are calibrated as a percentage of LEL. Typically, a warning alarm is set at 10–20% LEL and a high alarm triggering evacuation and gas supply shutdown at 25–40% LEL — well below the explosive threshold.
The gas detection control panel provides relay outputs that connect to the HVAC system's Building Management System (BMS) or directly to AHU/fan starter panels. On gas alarm, the BMS activates emergency extract ventilation, closes gas supply solenoid valves, and may trigger an evacuation alert via the PAVA system. The Cause & Effect matrix documents every response action for each gas type and alarm level.
Need a Gas Detection System Design?
Contact ASDV Consultant for a life-safety compliant gas detection design with C&E matrix, drawings and BOQ.