Agni Response Indicator ABS Ceiling Mounted Concealed 502

A dual-LED concealed response indicator designed for conventional and addressable fire detectors, providing instant and clear visual alarm indication in concealed or inaccessible areas.

Description

The Response Indicator Concealed – 502 from Agni Instruments Engineers India Private Limited is a remote visual alarm device developed to enhance fire detection visibility in areas where detectors are not directly visible. 
It is commonly installed outside rooms, below false ceilings, inside air conditioning ducts, or in restricted spaces where the detector’s alarm LED cannot be easily seen. When the connected detector enters an alarm condition, the response indicator activates immediately, illuminating bright red LEDs to confirm the fire event. 

Built with a durable FR-ABS plastic enclosure, the unit features a rugged industrial design, flush mounting, and a low-profile appearance. The dual-LED configuration ensures wide viewing angles, high brightness, ultra-low power consumption, and a long operational life.
The Response Indicator Concealed – 502 is compatible with both conventional and addressable fire alarm systems and complies with key international and Indian fire safety standards, making it suitable for commercial, industrial, and institutional installations. 

Job to be Done

Primary Job

Help users quickly identify which fire detector has activated when the detector is installed in a concealed or inaccessible location.

Safety Job

Help occupants feel confident and guided during emergencies, Give facility managers peace of mind through and follow standard SOP

Functional Jobs

Visually indicate the fire alarm from a hidden detector, Provide immediate red LED confirmations during alarm conditions, Enable fast identification of the alarm source.

How it Works

How does the Agni Response Indicator Work?

The Response Indicator Concealed – 502 acts as a remote visual extension of a fire detector, providing immediate LED indication when a fire alarm is triggered. 

Application & Solution

  • False Ceiling Installations 
  • Air-Conditioning Ducts
  • Hotel Rooms & Corridors 
  • Server Rooms & Restricted Areas 
  • Industrial Facilities 

Application & Solution

  • False Ceiling Installations 
  • Air-Conditioning Ducts
  • Hotel Rooms & Corridors 
  • Server Rooms & Restricted Areas 
  • Industrial Facilities 

How does the Response Indicator Operate?

1. Connection to Fire Detector

The response indicator is directly wired to a compatible conventional or addressable fire detector using a 24V DC supply.

2. Normal Monitoring State

Under normal conditions, the response indicator remains inactive while continuously monitoring the detector’s status.

3. Fire Detection

When the connected smoke or heat detector senses fire conditions, it enters alarm mode.

4. Signal Transmission

The alarm signal is instantly transmitted from the detector to the Response Indicator Concealed-502.

5. Visual Alarm Indication

The dual high-brightness LEDs illuminate red, providing a clear and immediate visual confirmation of the alarm.

6. Quick Identification & Response

The illuminated indicator allows maintenance terms and occupants to quickly identify the activated detector, reducing response time during emergencies.

Product in One Line 

When fire detectors are not visible, the Response indicator Concealed 502 provides a clear red LED alarm indication so users can quickly identify the activated detector and respond faster during emergencies. 

Technical Specification

PARAMETER

Specification

Product Type

Response Indicator (Concealed)

Part Number

AGNI-502

Compatible Systems

Conventional & Addressable Detectors

Operating Voltage

15 VDC - 40 VDC

Average Current

2.5 mA @ 24 VDC

Cable Size

1.5 sq-mm

LED Type

Dual LED

LED Color

Red (in case of fire)

Viewing Angle

Wide

Operating Temperature

-10°C to +70°C (no icing)

Max Humidity

95% RH (non-condensing)

Dimensions

62 mm (H) × 70 mm (W) × 20 mm (D)

Enclosure Material

ABS Plastic (Acrylonitrible Butadiene Styrene)

Body Color

White

Mounting Type

Flush Mount

Weight

30 g 

IP Rating

IP40 (42 overall waterproof protection)

LED Life Span

Up to 100,000 hours

Design

Low profile, rugged industrial design

FAQ

What is a Response Indicator Concealed 502?

The Response Indicator Concealed 502 is a remote  visual alarm indicator that provides a clear LED indication when a connected fire detector enters an alarm condition.

When a fire is detected, the Response Indicator Concealed 502 instantly turns on its red LEDs to provide a clear visual alert outside the protected or concealed area.

It is used in locations where fire detectors are not easily visible, such as false ceilings, air-conditioning ducts, high-depth ceilings, outside rooms, or visually restricted areas.

When the connected detector detects fire and goes into alarm mode, the response indicator immediately illuminates with bright red LEDs, providing a clear visual confirmation of the alarm source.

The enclosure is made from ABS plastic (Acrylonitrile Butadiene Styrene), providing durable and a rugged industrial finish.

It conforms to UL, EN 54-5 / EN 54-7, NFPA-72, IS 2189, and NBC fire safety standards.

Agni Response Indicator Concealed 502

Dual LED Response Indicator Concealed-502 for conventional & addressable fire detectors. Clear remote alarm indication, low power, EN 54 compliant.Â