Agni Veiga Series Intelligent Addressable Photothermal Detector (Multi-Criteria)

Q: What Does the Agni Analog Photothermal Detector Detect?

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.

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.

Part Number:
VEIGA-IND-OH

Product Overview

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.

Fire Deteciton standards

Compliance & Certifications

CE
European Conformity

EN54-4 | EN45-2
European Norms

UL 217:2024
Functionality Compliance

IS 2189: 2022
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

Request a Quote

Our fire safety engineers respond within 2 hours with competitive pricing for your project

Call: 9811522993 / 9811554440

Variants

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
LED Indicator	360° visibility LED
Temperature	57°C (135°F)
Standby Current	70 µA @ 24 VDC
Alarm Current	6 mA @ 24 VDC
Compatible Bases	Fault isolator, Sounder beacon, Standard base

Multi Criteria Detector

VEIGA-INO-OH

Dual-Sensing Technology
Selectable Sensing	4 threshold levels
LED Indicator	360° visibility LED
Dust Protection	Dust Restrictor Chamber
Standby Current	70 µA @ 24 VDC
Alarm Current	6 mA @ 24 VDC
Compatible Bases	Fault isolator, Sounder beacon, Standard base

Optical Photoelectric Smoke Detector

VEIGA-IND-OP

Photoelectric Optical IR Technology
Selectable Sensing	4 threshold levels
LED Indicator	360° visibility LED
Dust Protection	Dust Restrictor Chamber
Standby Current	70 µA @ 24 VDC
Alarm Current	6 mA @ 24 VDC
Compatible Bases	Fault isolator, Sounder beacon, Standard base

Technical Specifications

Full Technichal Specificaiton - Agni Veiga Series FACP

All specifications for the analogue addressable fire alarm system, covering general performance, power supply, inputs/ outputs, and mechanical/ compliance other parameters.

Parameter	Specification
Product Type	Intelligent Analog Photothermal Detector (Multi-Criteria)
Part Number	VEIGA-IND-OH
Detection Method	Photoelectric Smoke + Thermal Detection
Communication Protocol	Intelligent Digital Communication Protocol
Thermal Detection	Fixed temperature and / or rate-of-rise
Temperature Range (Set)	−30°C to +70°C
Selectable Alarm Thresholds	4 configurable alarm threshold levels
4 application-specific modes	A: Sensitive, Mode B: Moderate, Mode C: Standard, Mode D: High Immunity
Adjustable Sensitivity	Fine-tunable to match application environment and reduce nuisance alarms

Parameter	Specification
Loop Voltage	15 Vdc – 40 Vdc
Average Standby Current	70 µA @ 24 Vdc
Alarm Current	6 mA @ 24 Vdc
Remote Output Max Current	20 mA

Parameter	Specification
Sounder Circuits	2 × 400 mA @ 21–28 VDC (28 V polarity reversal, monitored)
EOL Resistor (Sounders)	6K8 Ohm 5% 0.25 W \| Monitoring current limit 28 mA, fused at 500 mA
Sounder Load	devices @ 35 mA each
Common Fire Relay	Clean C/O – Max 3 A @ 30 VDC (Unfused)
Common Fault Relay	Maintained C/O – Max 3 A @ 30 VDC (Unfused)
Inputs: CC / PULSE	Switched −ve inputs, connect to 0 V to trigger. Max input 30 VDC. Non-latching. Protected via 10K Ohm impedance, 3v6 Zener diode
Earth Fault Monitoring	Yes
PBUS Output	RS-485 / Optional Port – RSU Comms, fused at 20 mA
Zone Normal Threshold	Minimum 192 analogue value (0 – 255 range)
Temp Sense Input	Thermistor TTC5103 – 10,000 Ohms @ 25°C (battery temperature compensation)
Loop (Addressable Circuit)	Max current 500 mA \| Max 240 devices per loop
Detection Zones	1 to 18 Detection Zones

Parameter	Specification
Diameter	Ø 110 mm
Height	48 mm
Weight (Including Base)	130 g
IP Rating	IP40 (IP42 with base waterproof protection)
Max Tolerated Humidity	95% RH (Non-condensing)
Dust Protection	Dust Restrictor Chamber (DRC)
LED Indication	360° Visibility LEDs
Standards Compliance	EN54-5 (Heat Detectors), EN54-7 (Smoke Detectors)
Installation Standard	IS 2189
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
Backnet/ModBus Card	FAP-ModBus
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
Stander Detector Base	IND-MB
Intelligent Addressable Loop Sounder Base	IND-S2MB / IND-SV2MB
Isolator Base	IND-ISO-B (Comming Soon)
Intelligent Addressable Loop Sounder cum Bcecon	IND-WSM+LPM
Intelligent Addressable Manual Call Point	IND-ALCP100
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

Application & Solution

Office buildings
Commercial Facilities
Electrical and equipment rooms
Industrial and institutional environments

Where it's Installed

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.

User Manual

Technical Specification

PARAMETER	Specification
Product Type	Intelligent Addressable Analog Photothermal Detector (Multi-Criteria)
Part Number	VEIGA-IND-OH
Detection Method	Photoelectric Smoke + Thermal Detection
Communication Protocol	Intelligent Digital Communication Protocol
Loop Voltage	15 Vdc – 40 Vdc
Average Standby Current	70 µA @ 24 Vdc
Alarm Current	6 mA @ 24 Vdc
Remote Output Max Current	20 mA
Temperature Range (Set)	−30°C to +70°C
Thermal Detection	Fixed temperature and / or rate-of-rise
Alarm Thresholds	4 Selectable Alarm Thresholds
LED Indication	360° Visibility LEDs
Dust Protection	Dust Restrictor Chamber (DRC)
Max Tolerated Humidity	95% RH (Non-condensing)
Max Loop Addresses	240 / 256
Weight (Including Base)	130 g
IP Rating	IP40 (IP42 with base waterproof protection)
Diameter	Ø 110 mm
Height	48 mm
Standards Compliance	EN54
Certification	CE Compliant (EN 54)

FAQ

What is an Analog Photothermal Detector?

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.

How does the Agni Analog Photothermal Detector work?

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.

What Does the Agni Analog Photothermal Detector Detect?

The detector identifies: