The original patented device built specifically for fire doors.
The Smart Fire Door Device is a discreet wireless device, easily installed directly onto an existing fire door. Once installed, continuous monitoring reveals how the door is used and how its performance changes over time.
Activity, condition and performance, captured at the door.
The Smart Fire Door Device captures how the door is used, how it moves and how its performance changes over time. This creates a continuous stream of information directly from the physical door.
Built to set the standard. Protected to stay ahead.
Parilon created the Smart Fire Door Device specifically for real-time fire door monitoring. The patented device, firmware and supporting technology form part of Parilon’s protected intellectual property — developed to lead a category that did not previously exist.
Long-life by design
Extended battery operation keeps doors monitored without frequent battery changes.
Engineered for reliability
Minimal maintenance supports dependable operation across demanding property environments. Fit and forget.
Securely connected
Protected wireless communication transmits information securely from every connected door.
Discreetly installed
Compact, purpose-built technology adds continuous monitoring without dominating the fire door.
Five layers, one job.
Scroll to take it apart. Each layer carries the part of the specification that belongs to it.
- Enclosure
- Edge board
- Sensing
- Radio
- Power
Enclosure
Self-contained. Nothing wired to the door.
The shell mounts to the door or the frame and references its own orientation at commissioning. No mains supply, no cable runs, no landlord connection to negotiate.
- Installation
- Door / frame-mounted, no building wiring
- Operating temp.
- 0 °C to +50 °C
- Environment
- Indoor use
- Setup
- Tap-to-start (NFC) guided flow
Edge board
Events, not raw streams.
The processor summarises each door cycle on the device and sends the summary. A watchdog recovers it from a fault without a visit, and re-calibration is guided and in place.
- Edge processing
- On-device per-cycle summaries
- Baseline
- Per-door reference captured at commissioning
- Watchdog
- On-device, auto-recovery on fault
- Re-calibration
- Guided, in-field, no removal
Sensing
How it reads the door.
A non-contact optical distance sensor for position, and multi-axis inertial sensing for motion and tilt. Together they resolve closed, open, held-open and not-latched.
- Door position
- Non-contact optical distance
- Motion & tilt
- Multi-axis inertial sensing
- States
- Closed / open, held-open, ajar / not-latched
- Reporting
- Event-driven plus periodic heartbeat
Radio
Licence-free, and a long way.
An adaptive LoRa link on the EU868 band carries the summaries to a Sensorite gateway. Spreading factor and transmit power are managed for range against battery life.
- Region
- EU868 (863–870 MHz)
- Modulation
- LoRa®, SF7–SF12 adaptive, 125 kHz
- Link
- Bidirectional, authenticated downlink
- Security
- Per-packet AES-128 authentication (MIC)
Power
A year on a single cell.
One internal Li-ion cell, deep sleep between events, wake on motion or schedule. The cell is field-replaceable and the device keeps its baseline and settings through a change.
- Power source
- Internal single-cell Li-ion
- Battery life
- Year-long at typical duty cycle
- Idle
- Ultra-low-power deep sleep
- Replacement
- Field-replaceable, keeps its calibration
-
Enclosure
Self-contained. Nothing wired to the door.
The shell mounts to the door or the frame and references its own orientation at commissioning. No mains supply, no cable runs, no landlord connection to negotiate.
- Installation
- Door / frame-mounted, no building wiring
- Operating temp.
- 0 °C to +50 °C
- Environment
- Indoor use
- Setup
- Tap-to-start (NFC) guided flow
-
Edge board
Events, not raw streams.
The processor summarises each door cycle on the device and sends the summary. A watchdog recovers it from a fault without a visit, and re-calibration is guided and in place.
- Edge processing
- On-device per-cycle summaries
- Baseline
- Per-door reference captured at commissioning
- Watchdog
- On-device, auto-recovery on fault
- Re-calibration
- Guided, in-field, no removal
-
Sensing
How it reads the door.
A non-contact optical distance sensor for position, and multi-axis inertial sensing for motion and tilt. Together they resolve closed, open, held-open and not-latched.
- Door position
- Non-contact optical distance
- Motion & tilt
- Multi-axis inertial sensing
- States
- Closed / open, held-open, ajar / not-latched
- Reporting
- Event-driven plus periodic heartbeat
-
Radio
Licence-free, and a long way.
An adaptive LoRa link on the EU868 band carries the summaries to a Sensorite gateway. Spreading factor and transmit power are managed for range against battery life.
- Region
- EU868 (863–870 MHz)
- Modulation
- LoRa®, SF7–SF12 adaptive, 125 kHz
- Link
- Bidirectional, authenticated downlink
- Security
- Per-packet AES-128 authentication (MIC)
-
Power
A year on a single cell.
One internal Li-ion cell, deep sleep between events, wake on motion or schedule. The cell is field-replaceable and the device keeps its baseline and settings through a change.
- Power source
- Internal single-cell Li-ion
- Battery life
- Year-long at typical duty cycle
- Idle
- Ultra-low-power deep sleep
- Replacement
- Field-replaceable, keeps its calibration
One path, and what travels down it.
Every reading takes the same route, and only derived status ever leaves the building.
Sensor » gateway » cloud
Authenticated LoRa from the sensor to the gateway, then HTTPS / TLS from the gateway to the Sensorite backend.
Authenticated air interface
Per-packet AES-128 authentication (MIC). Tamper and duplicate packets are dropped; downlink commands are MIC-verified.
Derived status, not raw streams
Byte-packed summaries — door state, link quality, timestamp. No raw sensor feed is transmitted or stored.
TLS and a per-gateway key
The gateway forwards over HTTPS with its own API key; secrets at rest on the gateway are encrypted on disk.
Operator-authorised updates
Firmware moves on a controlled release channel, authorised by the operator — never silently.
Licence-free, sub-GHz
EU868 (863–870 MHz): no spectrum licence, no SIM, and the sensor link does not lean on the building’s own network.
Not adapted for fire doors. Invented for them.
Parilon designed and developed the Smart Fire Door Device specifically to monitor fire doors continuously. Its hardware and firmware form part of Parilon’s protected intellectual property, with patented technology safeguarding the innovation behind the device.
The ones we get asked about the hardware
Put real-time monitoring directly onto the fire door.
See the Smart Fire Door Device in operation.