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VI
REL-iON™ Mission Critical Monitoring System 1
REL-iON™ Mission Critical Monitoring System 2
REL-iON™ Mission Critical Monitoring System 3
REL-iON™ Mission Critical Monitoring System 4
REL-iON™ Mission Critical Monitoring System 5
REL-iON™ Mission Critical Monitoring System 6

REL-iON™ Mission Critical Monitoring System

Early Warning Monitoring for Mission-Critical Applications

Monitoring System is a modular sensor platform designed to detect potential failure conditions in mission-critical environments before a fire event occurs.

Developed to support applications such as Battery Energy Storage Systems (BESS), switchgear rooms, and data infrastructure environments, REL-iON™ provides multi-point monitoring for early-stage risk identification—helping mitigate conditions that may lead to thermal runaway events.

As part of KiddeFenwal’s Specialty Detection portfolio, REL-iON™ complements detection, control, notification, and suppression solutions within an integrated fire protection strategy.

A Multi-Stage Risk Mitigation Approach

REL-iON™ supports a layered approach to hazard mitigation:

STAGE 1 – Prevention
Continuous monitoring of environmental and operational factors including:

  • Temperature
  • Humidity
  • Water leaks
  • Airflow
  • Vibration
  • Corrosion
  • Solid contaminants

STAGE 2 – Detection
Prior to a full thermal runaway event, lithium-ion batteries may vent gases due to internal pressure buildup. REL-iON™ supports detection of:

  • Volatile Organic Compounds (VOCs)
  • Carbon Dioxide (CO₂)
  • Hydrogen (H₂)

Hydrogen detection is especially critical in liquid-cooled battery environments, where gas release may precede visible failure.

REL-iON™ products are intended as early warning sensors for information and maintenance purposes. They are listed to codes and standards other than UL 268 and UL 521 fire detection standards.

REL-iON Sensor Chart
REL-iON Sensor Chart - Multi Point Monitoring
Key Advantages
  • Modular Sensor Architecture
    Supports deployment of over 63 sensor types within a unified platform.
  • Early Off-Gas Detection
    Identifies venting events before visible smoke or flame develops.
  • Designed for BESS and Critical Infrastructure
    Optimized for lithium-ion battery applications and other high-value assets.
  • Integrated Fire Protection Strategy
    Complements Kidde Fire Systems detection, control, and suppression solutions.
  • Approved Control Unit Compatibility
    Approved for use with Kidde Fire Systems conventional and addressable control units.
  • Expanded Connectivity
    Supports data retrieval via:
    • SNMP
    • Modbus TCP
    • MQTT (IoT cloud integration)
    • RS-485 (Modbus RTU) on select sensors

Applications

REL-iON™ is designed for mission-critical and high-value environments, including:

  • Battery Energy Storage Systems (BESS)
  • Switchgear rooms
  • Data centers
  • Network infrastructure
  • Electrical rooms
  • Wind turbines
  • Industrial process environments

The platform’s adaptable architecture enables customization for both battery-specific and broader asset monitoring applications.

Server Room
System Architecture

A typical REL-iON™ deployment may include:

  • Modular monitoring base unit
  • Multi-sensor inputs
  • Off-gas detection sensors
  • Environmental sensors
  • IP-based communication interface
  • Integration to fire alarm control units

The system supports integration into a broader Prevention-Detection-Control-Notification-Suppression ecosystem.

Connectivity & Integration

REL-iON™ is designed for seamless integration into facility monitoring systems and building management systems (BMS). Data can be accessed or transmitted using:

  • SNMP
  • Modbus TCP
  • MQTT
  • Modbus RTU (RS-485)

This enables real-time condition monitoring, remote diagnostics, and proactive maintenance strategies.

Listings & Certifications

Listings and certifications include:

  • UL Listed*
  • CSFM*

*Where applicable

Technical Documents

Early Warning Before Escalation

Lithium-ion battery failures can escalate rapidly. By identifying abnormal environmental conditions and off-gas venting at early stages, REL-iON™ supports proactive intervention before suppression systems are required.

As part of KiddeFenwal Specialty Detection portfolio, REL-iON™ enhances system intelligence, helping facilities protect critical assets and maintain operational continuity.

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Frequently asked questions

What does REL-iON™ detect in a battery system?

REL-iON™ detects the off-gas released when a lithium-ion cell starts to fail, VOCs, and temperature/humidity changes – early precursors of thermal runaway, usually before smoke or flame.

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KiddeFenwal Vietnam brings the full Kidde Fire Systems, Fenwal Controls and Kidde Fire Protection portfolio – fire detection, suppression and safety controls – to critical industries in Vietnam.

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