Agni Response Indicator Concealed 503 | Dual LED Fire Alarm Indicator
Agni Instruments Engineers India Private Limited manufactures a dual-LED 503 response indicator compatible with both conventional and addressable fire alarm detectors. Built with a durable sheet-metal body for wall mounting, it connects directly to the detector base and provides a clear, bright red visual indication when the detector goes into alarm, ensuring fast and reliable identification of the alarm source.
Part Number: AGNI-503 | Category: Response IndicatorÂ
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Description
Agni -503 Response Indicator Concealed or Flush mount is a dual-LED remote visual device designed to duplicate a fire detector’s alarm LED at an accessible and clearly visible location when the detector itself is installed in concealed or obstructed areas. It is especially beneficial for installations in high-depth or false ceilings, air-conditioning ducts, outside rooms, laboratories, stores, cabins, and other restricted or visually blocked locations. By providing a remote visual alarm indication, the device helps reduce response time during fire events and supports efficient maintenance, inspection, and emergency intervention.
Agni -503 Response Indicator Concealed or Flush compliance with EN 54-5-7, NFPA-72, IS 2189, NBC, standard and is tested by NABL and ERTL laboratories. It also conforms to Government of India CPWD DSR specifications, making it suitable for regulated, certified, and government fire safety projects.
The response indicator is assembled inside a robust sheet-metal enclosure that protects the internal electronic circuitry from environmental and mechanical damage. The enclosure is manufactured from CRCA sheet metal using a precision sheet metal forming process, ensuring correct bends, accurate dimensions, and uniform build quality. This construction provides long-term durability and reliable performance in demanding installation environments.Â
The device supports surface or flush mounting based on site requirements and delivers clear status indication for faster smoke detection alarm identification .Manufactured by Agni instruments engineers India private limited., this dual-LED response indicator is designed compatible with conventional and addressable fire alarm detectors. It connects directly to the detector base and provides a clear visual indication during alarm conditions. The dual LEDs enhance visibility, allowing operators and emergency personnel to quickly understand alarm status. The product is widely used in commercial buildings, industrial facilities, data centers, hospitals, hotels, warehouses, and other critical safety environments.
How it Works
How does the Response Indicator Concealed 503 Work?
The Response Indicator Concealed 503 acts as a remote visual extension of a fire detector’s alarm LED, ensuring that alarm activation is clearly visible even when the detector itself is hidden or obstructed.
Commonly Used
- False Ceiling in Office Buildings
- Air-Conditioning Duct DetectionÂ
- Server Rooms & Data CentersÂ
- Hospitals & Laboratories
- Warehouses & Industrial Facilities
Step-by-Step Response Indicator Working Principle?
01
Direct Connection to Detector Base
The response indicator is electrically connected to the fire detector base using a standard 1.5 sq. mm cable.
02
Normal Operating Condition
Under normal conditions, the indicator remains inactive while continuously monitoring the detector’s alarm output circuit.
03
Detector Alarm Activation
When the connected fire detector senses fire and enters an alarm condition, it immediately sends a signal to the response indicator.
04
Dual LED Visual Indication
The Response Indicator Concealed 503 instantly illuminates high-bright red dual LEDs with a wide viewing angle, clearly indicating the alarm location.
05
Remote Visibility in Concealed Areas
Even if the detector is located above false ceilings or inside ducts, the response indicator provides a clear, visible alert at an accessible location.
06
Low Power, Continuous Reliability
The indicator operates on 15-40 VDC and consumes ultra-low power, ensuring dependable operation without overloading the fire alarm system.
Technical Specification
|
PARAMETER |
Specification |
|---|---|
|
Product Type |
Response Indicator (Concealed OR Flush Mount) |
|
Model |
503 |
|
Operating Volatage |
15 VDC - 40 VDC |
|
Average Current |
7.27 mA @ 24 VDC |
|
LED Type |
Dual LED |
|
LED Color |
Red (In Case Of Fire)Â |
|
Viewing Angle |
Wide Viewing Angle |
|
Operating Temperature |
-10°C to +90°C (No Icing) |
|
Maximum Humidity |
95% RH (Non-Condensing) |
|
Cable Size |
1.5 sq. mm |
|
Mounting Type |
Flush Mount |
|
Enclosure Type |
Rugged / Industrial Design |
|
Body Material |
CRCA Mild Steel |
|
Body Color |
RAL-9010 White Coating |
|
Dimensions (H × W × D) |
80 × 58 × 48 mm |
|
Weight |
250 g |
|
IP Rating |
IP 42 (Overall Protection) |
|
Power Consumption |
Ultra Low Power |
|
LED Life Span |
Up to 100,000 Hours |
|
Design Profile |
Low Profile Design |
|
Immunity |
Advanced Immunity to Airborne Contaminants |
|
Standards Compliance |
EN 54-5-7, IS 2189, NFPA-72 |
|
LAB TESTÂ |
ERTL / NABL |
|
Application |
Fire Alarm Remote Visual Indication |
Standards & Guidelines : According to IS 2189 / NBC / NFPA-72 should be installed on the outside of the room, cabinet, or directly below the false ceiling to ensure visibility. it is recommended to fit indicators external to the doors to indicate if a detector within that room has operated.
Job to be Done
Primary Job
When a fire detector is installed in a concealed or visually obstructed location, the Response Indicator Concealed 503 helps users see immediately which detector has gone into alarm, without opening ceilings, ducts, or restricted areas.
Safety Job
Ensures visible fire alarm indication for concealed detectors, reduces response time, aids safe evacuation, supports maintenance, improves emergency coordination, and enhances compliance in buildings where detectors are hidden from direct view during critical incidents.
Operational Job
Provides remote visual indication of concealed fire detectors, helps quickly identify alarm location, supports faster inspection and maintenance, reduces access delays, and enables clear alarm recognition in visually obstructed or restricted installation areas.
FAQ
What is a Response Indicator Concealed 503 used for?
The Response Indicator Concealed 503 is used to provide a remote visual alarm indication when a connected fire detector activates. It is ideal for locations where the detector itself is not directly visible.Â
Where is a concealed response indicator typically installed?
It is commonly installed in false ceilings, high-depth ceilings, air-conditioning ducts, outside rooms, laboratories, cabins, stores, and other visually obstructed or restricted areas.Â
Is this product suitable for government and commercial projects?
It conforms to Government of India CPWD DSR specifications, making it suitable for government, commercial, industrial, and institutional projects.Â
What Happens During a Fire Alarm?
When a fire detector activates:Â
- The concealed response indicator turns ON immediatelyÂ
- Bright red LEDs provide clear visual confirmationÂ
- The alarm source is identified without opening ceiling or ducts
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