Notifier NFSTI-SMT2 Self-Test Optical Heat Multi-Sensor with Isolator

The Notifier NFSTI-SMT2 is an addressable optical/heat multi-criteria detector from Notifier's Self-Test range, with a built-in isolator. It automates functional testing by introducing real smoke and heat into the detector: it safely heats the thermistor to check the heat response, and it generates smoke from an embedded module to test the optical sensor. A small fan moves the aerosol through the chamber and out through the smoke entry points to prove they are not blocked.

Each detector also has a built-in Bluetooth Low Energy (BLE) beacon, which the Connected Life Safety Services (CLSS) app picks up automatically. The engineer can see device details within visual inspection range and confirm the visual inspection in the app. The self-test functions need a Notifier INSPIRE panel (software 1.2.0-R.108 or later), a CLSS gateway, the CLSS mobile app and a self-test licence.

Key features

• Multi-criteria optical and heat sensing
• Two LEDs give 360° local status indication; optional remote LED indicator connection via the standard base terminals
• Built-in isolator that can be used or not, depending on the wiring
• Rotary address switches: 01 to 159
• Tamper resistance prevents removal from the base without a tool
• Works with both AP and CLIP protocols (self-test mode requires AP)
• Test modes: single device, loop or whole panel; up to 1 minute per device
• Full compliance reports can be generated through CLSS

Technical specifications

• Operating current: 200 µA at 24 V DC (one communication every 5 seconds)
• Maximum alarm current: 2 mA at 24 V DC
• Maximum current: 4.5 mA at 24 V DC
• Operating temperature: -5 °C to +47 °C
• Relative humidity: 10% to 93%, non-condensing
• Weight: 110 g
• Dimensions: Ø 102 mm x 55 mm
• Colour: pure white
• Base: B501AP
• Self-test maximum alarm current: 300 mA at 15 V DC, 180 mA at 24 V DC
• Air velocity range: 0 to 20 m/s (0 to 1.5 m/s during self-test)
• Heat element: rate-of-rise 10 °C/minute (Class A1R)
• Approvals: EN 54-5 Class A1R, EN 54-7, EN 54-17