Agni Veiga Series Intelligent Addressable Photothermal Detector (Multi-Criteria)
The Agni Veiga IND-OH is an intelligent addressable photothermal (multi) detector that combines an optical chamber and thermal element fixed-temperature and rate-of-rise heat detection with a microprocessor-driven algorithm to deliver fast, accurate fire detection. By evaluating photoelectric smoke and heat data together, it responds faster to real fire situations while significantly reducing unwanted false alarms — making it the right addressable multi sensor for mission-critical commercial and institutional environments. EN54-5, EN54-7 and IS 2189 compliant.
One Addressable Multi Sensor. Two Detection Methods
The Agni Veiga Series Addressable Photothermal (Multi) Detector is a multi-criteria point detection device that combines an optical chamber and a thermal element with an onboard microprocessor running sophisticated algorithms to provide quick and accurate detection of fires. As an intelligent analogue photothermal detector, it doesn't react to one signal in isolation — the microprocessor weighs smoke and heat data together, so the combination of photoelectric and thermal characteristics delivers a faster response to real fire situations while at the same time reducing the risk of unwanted, environmentally generated alarms.
This addressable multi criteria photothermal detector represents advanced fire detection technology for mission-critical commercial and institutional environments. Engineered for precision and reliability, it provides comprehensive fire event monitoring across diverse application scenarios — from clean office spaces to electrically dense equipment rooms. Built with a Dust Restrictor Chamber (DRC), the detector resists contamination from airborne dust and particulates over years of service, and its low-profile housing with 360° status LEDs stays unobtrusive while remaining instantly readable during any walk-through or fault check.
Like all Agni addressable detectors, the Veiga IND-OH communicates over Agni's fully digital intelligent protocol — 2 km working on 1.2 SWG wire gauge — and supports auto-addressing on compatible fire alarm control panels. Reduced commissioning time for large addressable loops.
Compliance & Certifications
CE
European Conformity
EN54-4 | EN45-2
European Norms
UL 217:2024
Functionality Compliance
IS 2189: 2022 / 2026
NABL Laboratories Test Certificate
ERTL North (Govt. India)
functional test certificate
Code of Practive
INDIA- BIS | NBC
Approved Department
Government of India
Department of CPWD / PWD
Complied with CPWD DSR
Our fire safety engineers respond within 2 hours with competitive pricing for your project
Call: 9811522993 / 9811554440
Choose The Ideal Addressable Detector for your Smoke and Heat Detection Application
The Veiga Series is available in customizable device configurations, all built on the same intelligent addressable microprocessor platform. Every loop supports a wide range of devices, enabling the design of standard or flexible hybrid fire alarm systems. Supported devices include optical smoke detectors, RoR/Fixed-Temperature heat detectors, multi-criteria detectors, beam detectors, loop-powered sounders, strobes, detector beacon bases, manual call points, monitor modules, and zone monitor modules.
Select the model that best matches your site’s device capacity, application requirements, and future expansion needs.
Fixed Temperature Heat Detector
VEIGA-IND-HT
|
ROR cum Fix Sensing Technology |
|
|
Threshold |
Rate-of-Rise: 7°C–10°C/min |
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LED Indicator |
360° visibility LED |
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Temperature |
57°C (135°F) |
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Standby Current |
70 µA @ 24 VDC |
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Alarm Current |
6 mA @ 24 VDC |
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Compatible Bases |
Fault isolator, Sounder beacon, Standard base |
Multi Criteria Detector
VEIGA-INO-OH
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Dual-Sensing Technology |
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Selectable Sensing |
4 threshold levels |
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LED Indicator |
360° visibility LED |
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Dust Protection |
Dust Restrictor Chamber |
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Standby Current |
70 µA @ 24 VDC |
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Alarm Current |
6 mA @ 24 VDC |
|
Compatible Bases |
Fault isolator, Sounder beacon, Standard base |
Optical Photoelectric Smoke Detector
VEIGA-IND-OP
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Photoelectric Optical IR Technology |
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Selectable Sensing |
4 threshold levels |
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LED Indicator |
360° visibility LED |
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Dust Protection |
Dust Restrictor Chamber |
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Standby Current |
70 µA @ 24 VDC |
|
Alarm Current |
6 mA @ 24 VDC |
|
Compatible Bases |
Fault isolator, Sounder beacon, Standard base |
Full Technichal Specificaiton - Agni Multi Detector
All specifications for the analogue Intelligent addressable Photothermal Detector (Multi-Criteria) covering general performance, power supply, inputs/ outputs, and mechanical/ compliance other parameters
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Parameter |
Specification |
|---|---|
|
Product Type |
Intelligent Analog Photothermal Detector (Multi-Criteria) |
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Part Number |
VEIGA-IND-OH |
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Detection Method |
Photoelectric Smoke + Thermal Detection |
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Smoke Sensitivity |
1.96 ± 0.76 / FT@ Obscuration |
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Particle Velocity |
0-4000 FPM |
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Thermal Threshold |
Triggers at 135°F (57°C) |
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Communication Protocol |
Intelligent Digital Communication Protocol |
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Thermal Detection |
Fixed temperature and / or rate-of-rise |
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Operating Temperature (Non icing) |
-10°C to +49°C |
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Selectable Alarm Thresholds |
4 configurable alarm threshold levels |
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4 application-specific modes |
A: Sensitive, Mode B: Moderate, Mode C: Standard, Mode D: High Immunity |
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Adjustable Sensitivity |
Fine-tunable to match application environment and reduce nuisance alarms |
|
Parameter |
Specification |
|---|---|
|
Remote Indication |
Output Signal |
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Alarm Led |
Red: flashes every 2-4s |
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Alarm Led |
Llluminates continuously in alarm |
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Working Principle |
Fusion of both sensor thermistor variable temperature rate of rise optical photoelectric infrared smoke particles sampling |
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Wiring |
Two-wire,polarity sensitive, |
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Contact Configuration |
Loop In Positive (+) / Loop In Nagative (-) / Loop Out Positive (+) / Loop Out Negative (-) |
|
Parameter |
Specification |
|---|---|
|
Diameter |
Ø 110 mm |
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Height |
48 mm |
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Weight (Including Base) |
130 g |
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IP Rating |
IP40 (IP42 with base waterproof protection) |
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Max Tolerated Humidity |
95% RH (Non-condensing) |
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Dust Protection |
Dust Restrictor Chamber (DRC) |
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LED Indication |
360° Visibility LEDs |
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Standards Compliance |
EN54-5 (Heat Detectors), EN54-7 (Smoke Detectors) |
|
Installation Standard |
India IS 2189 (2026) / NBC /NFPA 72 / ISO 7240 / EN54 |
|
Certification |
CE Compliant (EN 54) — ERTL / NABL Tested |
|
Veiga Seires |
Part Number |
|---|---|
|
1 to 4 Loop Addressable Fire Alarm Control Panel |
VEIGA-FAP-1001 / VEIGA-FAP-1002 / VEIGA-FAP-1004 |
|
Network Active Repeater Panel |
VEIGA-FAP-2001 |
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Backnet/ModBus Card |
FAP-ModBus |
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RS-485 Network communication card |
VEIGA-FAP-3002 |
|
Handheld Programmer |
VEIGA-IND-ALPU1000 |
|
Addressable Photothermal(Multi) Detector |
VEIGA -IND-OH |
|
Addressable Optical Smoke Detector |
VEIGA -IND-OP |
|
Addressable ROR cum Fixed Temperature |
VEIGA -IND-HT |
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Stander Detector Base |
IND-MB |
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Intelligent Addressable Loop Sounder Base |
IND-S2MB / IND-SV2MB |
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Isolator Base |
IND-ISO-B (Comming Soon) |
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Intelligent Addressable Loop Sounder cum Bcecon |
IND-WSM+LPM |
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Intelligent Addressable Manual Call Point |
IND-ALCP100 |
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Addressable Input/Monitor Module |
IND-VMI100 |
|
Addressable Control Module |
IND-VMIC-120 |
|
Addressable Zone Monitor Module |
IND-VMCZ100 |
|
Addressable Isolator Module |
IND-LVMX100 |
How it Works
How does the Agni Veiga Intelligent Analog Photothermal Detector Work?
The Agni Veiga Series Intelligent Analog Photothermal Detector operates using a multi-criteria fire detection approach, combining photoelectric smoke sensing with thermal monitoring to identify fire conditions accurately and at an early stage.
Application & Solution
- Office buildings
- Commercial Facilities
- Electrical and equipment rooms
- Industrial and institutional environments
Right Instalation application For Smoke and Heat Addressable Fire Alarm Detector
Commercial Office Buildings
NBC 2025 compliant addressable fire alarm panel for IT parks, corporate towers, and corporate towers, and co-working spaces above 15m.
Hospitals & Healtcare
Device-level alarm precision ensures fast, targeted evacuation without false alarms disrupting patient care areas.
Industrial & Manufacturing
Rugged IP30 enclosure and loop fault diagnostics make the Veiga Series ideal for warehouses, factories, and process plants.
Government & CPWD Projects
CPWD DRL approved — eligible for Central and State Government buildings under CPWD Part VI DSR specifications.
Product in One Line
I need a reliable multi-criteria detector that senses smoke and heat accurately, reduces false alarms, and triggers timely evacuation and response during real fire events.
Built as a True Addressable Multi Criteria Photothermal Detector
True intelligent addressable multi-sensor optical photoelectric and rate-of-rise thermal heat detection, engineered to international standards for the most demanding applications
Intelligent Digital Protocol
Fully digital communication with auto-addressing on compatible Agni-protocol control panels.
360° LED Visibility
Status and alarm condition readable from any approach angle for fast field diagnosis.
Dust Restrictor Chamber
Advanced immunity to airborne contaminants for long-term sensing stability.
4 Selectable Alarm Thresholds
Tune sensitivity to the risk profile of each protected zone.
Handheld Programming Tool
Compatible with Agni's programmable handheld device for quick field configuration.
Improves Fire Detection Accuracy
Built-in Advanced multi-sensor drift compensation firmware
Frequently Asked Questions
An Analog Photothermal Detector is a multi-criteria fire detection device that combines photoelectric smoke sensing with thermal detection to identify fire conditions early while reducing false alarms.
The detector continuously monitors airborne smoke and temperature changes. Intelligent algorithms analyze data from both sensing elements to confirm genuine fire conditions before triggering an alarm.
The detector identifies:
- Smoke using photoelectric sensing
- Heat using fixing temperature and rate-of-rise detection
By combining these two detection methods, it responds accurately to both slow-smoldering and fast-developing fires.
When a real fire condition is confirmed:
- The detector enters alarm mode
- High-visibility LEDs provide 360-degree visual indication
- A digital alarm signal is sent to the fire alarm control panel
- The exact detector location is identified instantly
This allows faster response and safe evacuation.
Intelligent Multi-Criteria Photothermal Fire Detector
Agni Veiga Intelligent Analog Photothermal Detector with smoke and heat sensing. EN54 Compliant, low false alarms, addressable fire detection.

