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FPTI-951A Multi-Criteria Detector
(Replaces FAPT-851A) Multi-Criteria Photo/Thermal/ Infrared Detectors Addressable

The FPTI-951/-IV and FPTI-951A/-IV are plug-in addressable multicriteria
detectors that replace the FAPT-851 Series. They combine
photoelectric, thermal, and infrared (PTIR) sensors in one unit to
sense multiple components of a fire. This approach enables
enhanced sensitivity to real fire with heightened immunity to nuisance
particulates.

Multiple sensors and communication can greatly reduce nuisance
alarms compared to single sensing methods. Sophisticated algorithms
maximize the advantages of the sensor types. This detection
strategy offers heightened immunity to nuisance particulates and
enhanced sensitivity to real fire.

• Photoelectric sensors detect airborne particles associated with
smoke.
• Thermal sensors detect heat and rate-of-rise (135°F fixed temperature
threshold).
• The Infrared sensor discerns light patterns in the environment as
an additional data point for alarm determination.

This ability to reject certain nuisance alarm triggers, such as theater
smoke, supports the use of the detector in applications where moderate
to heavy nuisance conditions exist that might cause single
sensing detectors to trigger a false alarm.

The PTIR detector meets both UL 268 7th edition and UL 521 listing
requirements and can indicate distinct smoke and heat alarms. This
dual nature supports a local alarm setting for photoelectric detection
and a general evacuation setting based on thermal detection. This
can minimize work interruptions in multi-level buildings. Canadian
models meet listing requirements of CAN/ULC S529 and CAN/ULC
S530.

  View Data Sheet

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