Simplex 4098-9602 TrueSense Smoke and Heat Detector

The Simplex 4098-9602 TrueSense Smoke and Heat Detector provides combined photoelectric smoke and thermal detection for compatible conventional fire alarm systems. It uses advanced sensing technology to recognize developing fire conditions. In addition, its onboard microprocessor analyzes smoke and temperature information to improve detection performance and reduce nuisance alarms.

TrueSense Smoke and Heat Detection

The Simplex 4098-9602 combines photoelectric smoke detection with fast-response thermistor-based heat sensing. These technologies monitor different characteristics of a developing fire.

The optical sensing chamber detects smoke particles. Meanwhile, the thermal sensor monitors temperature changes.

As a result, the detector can evaluate smoke and heat activity together. This approach helps identify certain developing fire conditions earlier than either sensing method alone.

Four Independent Detection Modes

The detector features four detection modes that provide flexible fire alarm protection.

Photoelectric Smoke Detection: The optical chamber monitors airborne smoke particles. TrueAlarm drift compensation helps maintain stable sensitivity over time.

Fixed-Temperature Heat Detection: The thermal sensor activates when the detector reaches its 135°F (57°C) operating threshold.

Rate-of-Rise Heat Detection: The detector monitors rapid temperature increases. This function provides additional thermal detection capability under applicable operating conditions.

TrueSense Combined Detection: The onboard microprocessor evaluates smoke and thermal activity together. Therefore, it can identify fire conditions through correlated sensing information.

TrueAlarm Sensitivity Drift Compensation

The detector uses TrueAlarm technology to compensate for gradual changes in the smoke sensing chamber.

For example, dust accumulation can affect optical smoke detection sensitivity. However, the detector continuously evaluates sensor information to maintain consistent performance.

In addition, the detector can indicate when contamination approaches its compensation limit.

This diagnostic capability helps maintenance personnel identify detectors that require inspection or cleaning.

Key Features

• TrueAlarm photoelectric smoke detector
• TrueSense combined smoke and heat detection
• Conventional fire alarm circuit operation
• Four independent detection modes
• Photoelectric smoke sensing
• 135°F fixed-temperature heat detection
• Rate-of-rise heat detection
• Thermistor-based temperature sensing
• Automatic sensitivity drift compensation
• Onboard microprocessor
• Magnetic functional testing
• Diagnostic LED status indication
• Compatible two-wire and four-wire bases
• Remote alarm LED options
• Optional auxiliary relay bases
• Low standby current
• White detector housing
• Suitable for commercial fire alarm applications

Electrical Specifications

The Simplex 4098-9602 operates from a rated 15 to 32 VDC supply through a compatible initiating device circuit.

The detector’s maximum alarm current is approximately 86mA, depending on the connected circuit and current-limiting configuration.

In addition, its low standby current helps reduce electrical demand during normal supervision.

Installers should verify the exact circuit configuration and compatible base before installation.

Heat Detection Performance

The fixed-temperature element operates at approximately 135°F (57°C).

The rate-of-rise function responds to temperature increases of approximately 20°F per minute or greater. However, this feature operates only when ambient temperature exceeds approximately 90°F.

Therefore, technicians must consider normal temperature fluctuations when selecting an installation location.

Compatible Detector Bases

This detector supports several compatible Simplex mounting bases.

The 4098-9788 provides a two-wire mounting configuration with connections for a remote LED indicator.

The 4098-9682 supports four-wire operation with auxiliary alarm relay contacts. Meanwhile, the 4098-9683 provides a two-wire configuration with auxiliary relay functionality.

These options provide flexibility for compatible conventional fire alarm installations.

Environmental Specifications

The detector supports a UL-listed operating temperature range of 32°F to 100°F (0°C to 38°C).

It also supports relative humidity from 10% to 95% under specified conditions.

The approved air velocity range extends from 0 to 2,000 feet per minute.

Therefore, installers should verify environmental conditions before selecting the device.

Typical Fire Alarm Applications

This combination detector supports compatible commercial and institutional fire alarm systems.

For example, applications may include office buildings, schools, healthcare facilities, hotels, warehouses, and other commercial properties.

Its combined sensing technology can provide additional detection information in locations that benefit from both smoke and heat monitoring.

Installation and Compatibility

Before installation, confirm the fire alarm control panel, initiating circuit requirements, detector base, and operating voltage.

Also, verify the approved detector spacing and environmental conditions.

Qualified fire alarm professionals should install, inspect, and test the detector. Furthermore, technicians should follow Simplex installation instructions and applicable NFPA requirements.

Overall, this Simplex TrueSense detector provides dependable combined smoke and thermal detection for compatible conventional fire alarm systems. Its four detection modes, sensitivity drift compensation, diagnostic features, and flexible base options make it a practical solution for professional fire alarm applications.

4098-9602 Datasheet