S-Quad industry changing S4T Series – self-test multi-sensors with sounder, voice, and VAD variants.

The integrated self-test functionality enables automated testing of both the heat and optical sensors. The patented testing method involves heating the heat-sensing thermistor and generating real aerosol (smoke) to test the optical sensor. An internal fan disperses the aerosol from the detection chamber through the smoke entry points and into the surrounding environment. This simulates a realistic fire scenario and verifies that the smoke entry points remain unobstructed and capable of detecting actual smoke, whilst also checking that the detection device has not been covered.

Each unit includes Bluetooth Low Energy (BLE) functionality. When BLE is activated, the device acts as a beacon, enabling detection by mobile applications such as the CLSS app. BLE capabilities support device identification, verification of device details, and confirmation of proximity during visual inspections.

The S4T is a redesigned detector device featuring an IP21-rated external moulding, a new detector chamber design, and a dual microprocessor PCB. The updated architecture enhances smoke detection performance and increases voice storage capacity.

Features and benefits:

Available in a large range of multi-sensor, Part-23 VAD and sounder/ voice options.
Enables discrete functional testing and visual inspection of the fire alarm system by reducing the engineer toolset to just a mobile device (phone or tablet). No more impact on building occupiers.
Tests both the heat and smoke sensors by heating the thermistor and introducing small amounts of smoke into the detection chamber.
Gently blows the smoke out of the detection chamber and smoke entry points to ensure they are not blocked.
Flexible testing options allow the engineer to test in different ways – single device, detection zone, loop(s), panel(s).
Allows up to six devices to be tested at once per loop and any number of loops can be tested simultaneously, making the functional testing incredibly fast.
Device testing is fast enough to allow up to four functional tests to be performed per year for the lifespan of the device.
Eliminates all access issues when detector testing, ensuring 100% functional testing is achieved.
Allows the system to remain active whilst testing as each detector is only offline for 60 seconds and outputs are not generated.
Any fires detected outside of the devices performing self-test will stop the self-test process and operate the fire systems cause and effect.
Allows the engineer to easily locate the detector using the App and BLE to check the device number, label, zone description and detector type.
Allows simple device updates to be performed through the App, including the correction of inaccurate device labels and loop mapping.
The app and BLE handshake verifies that the engineer has been within visual inspection range.
Optional Inspection prompt LEDs on the device let the engineer know what self-test devices need to be visually inspected and will automatically turn off when the visual inspection is complete.
Engineers can spend more time digitally capturing non-compliance issues and advising how to resolve them. This includes any issues causing false alarms.
Test fire LED option in the App allows the fire LED to be tested (a pending BS 5839-1 testing requirement). This feature can additionally confirm that they are inspecting the correct device.
The CLSS App allows the engineer to simulate a fire and test the cause and effect logic.
The CLSS App also allows the cause and effect to be triggered through a successful self-test operation, allowing a witness test to be performed using real smoke.
EN54 Certified and Designed to meet the requirements in full of section 43.3.5, 42.2.6 and 43.3.7

Honeywell Gent S4-720, S4T-720 EN54 Certificate of Approval