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Sensors

Sentinor’s sensors provide high‑assurance intrusion detection for access points, hatches and doors across critical national infrastructure. Using multi‑layer technologies — including seismic detection, magnetic and mechanical switching, liquid ingress monitoring and on‑alarm audio capture — our sensors accurately identify genuine attacks while remaining highly resistant to false alarms.

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Available in robust hardwired and fully encrypted radio variants, Sentinor sensors integrate seamlessly with Enhanced+ and Uni IO to deliver reliable, tamper‑resistant protection for both new and legacy sites.

Sensor - Hardwired

Sensor - Radio

Sensor - RDSK

Sensor - 4G

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Sensor - Hardwired

Advanced multi‑layer intrusion detection for critical access points

Sentinor’s hardwired sensor is an advanced intrusion detection solution designed to protect access points, hatches and doors across critical infrastructure. Built for harsh, demanding environments, it delivers advanced detection with exceptional immunity to false alarms.

 

Combining seismic recognition algorithms, a toughened magnetic switch, a lever‑switch, and dual‑float switch integration, our sensor provides multi‑layered protection against unauthorised access and a range of different attack types. This combination of technologies allows the sensor to distinguish genuine threats from environmental noise, ensuring reliable performance in the field. When an alarm is triggered, on‑event recorded audio gives control room operators insight into what caused the intrusion, helping them respond quickly and accurately.

 

Designed to work seamlessly with Enhanced+ and Uni IO alarm analysers, delivering assured protection for CNI access points, hatches and doors. Designed to fit a broad range of industry‑standard hatches and doors, it installs quickly and cleanly, making it ideal for both new and legacy infrastructure.

Robust, accurate and easy to deploy, Sentinor’s sensor delivers trusted protection where it matters most.

Features

  • Multi-layer intrusion detection

  • Multiple compatible detectors

  • Tested for use in harsh environmental conditions

  • High immunity to false alarms

  • On-alarm recorded audio capture

  • Designed to fit industry standard hatches, doors and access points

  • Secure non-programmable sensor thresholds

Immune to

  • Operational noises

  • Environmental influences

Compatible technology

Attack Detection

  • Opening

  • Liquid ingress

  • Hammers

  • Chisels

  • Saws

  • Crowbars

  • Concrete grinders

  • Diamond-head drills

  • Hydraulic pressure tools

  • Hydro-jet cutting tools

  • Thermal cutting torches

  • Oxygen lances

  • Explosives

Alarm verification

  • Recorded audio

Compliance

  • NPSA approved

  • NaTSCO approved

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Sensor - Radio

High‑assurance wireless intrusion detection for remote and hard‑to‑reach access points

Sentinor’s Radio sensor is an advanced intrusion detection solution designed to protect access points, hatches and doors across critical infrastructure. Built for harsh, demanding environments, it delivers high‑assurance detection with exceptional immunity to false alarms — now in a fully battery‑powered, cable‑free design.

 

Using the same core detection technologies as our hardwired model — including seismic recognition algorithms, a toughened magnetic switch, a lever switch and dual‑float switch integration — the radio sensor provides multi‑layered protection against unauthorised access and a wide range of attack types. This intelligent combination of technologies allows the sensor to distinguish genuine threats from environmental noise, ensuring reliable performance in the field.

 

Instead of wired connections, the radio sensor communicates securely with alarm analysers via encrypted radio, delivering robust, tamper‑resistant, cyber-secure alarm transmission without the need for cabling or external power. This makes it ideal for remote, hard‑to‑reach or retrofit locations where wiring is impractical or cost‑prohibitive.

 

Designed to work seamlessly with Enhanced+ and Uni IO alarm analysers, it provides assured protection for CNI access points, hatches and doors. Engineered to fit a broad range of industry‑standard hatches and doors, it installs quickly and cleanly on both new and legacy infrastructure.

 

Robust, accurate and easy to deploy, Sentinor’s radio sensor delivers trusted protection where cables can’t go.

Features

  • Encrypted radio communication

  • Long-life battery life

  • No cabling required

  • Reliable wireless performance

  • Perfect for retrofit sites

  • Multi-layer intrusion detection

  • Multiple compatible detectors

  • Tested for use in harsh environmental conditions

  • High immunity to false alarms

  • On-alarm recorded audio capture

  • Designed to fit industry standard hatches, doors and access points

Attack Detection

  • Opening

  • Liquid ingress

  • Hammers

  • Chisels

  • Saws

  • Crowbars

  • Concrete grinders

  • Diamond-head drills

  • Hydraulic pressure tools

  • Hydro-jet cutting tools

  • Thermal cutting torches

  • Oxygen lances

  • Explosives

Immune to

  • Operational noises

  • Environmental influences

Compatible technology

RSDK kit no background.png

Sensor - RDSK

Rapidly deployable wireless intrusion detection for emergency or temporary protection

The Watercress Rapidly Deployable Sensor Kit (RDSK) provides an immediate, high‑assurance intrusion detection solution for situations where fixed sensors have failed, cabling has been damaged, or emergency protection is required. Designed for rapid deployment in critical national infrastructure environments, RDSK allows engineers to restore security coverage without the need for civil works, cabling or system downtime.

 

Each RDSK uses Sentinor’s proven wireless intrusion detection technology, combining seismic recognition, magnetic and lever‑switch detection, and dual‑float switch integration to deliver reliable, multi‑layer protection across hatches, doors and access points. The sensors communicate using encrypted radio, ensuring cyber-secure alarm transmission even in demanding or compromised environments.

 

The kit includes a dedicated radio receiver, engineered for quick and simple integration into any Enhanced+ system. Once connected, alarms from the deployed wireless sensors are processed and managed just like fixed Watercress sensors, providing operators with consistent, trusted protection and full situational awareness.

 

Available in 2, 4, 6 and 8‑sensor kits, the RDSK is supplied in a robust, protective briefcase‑style carry case and packaged as a complete, ready‑to‑use solution—ideal for emergency response, temporary protection, maintenance periods, or environments where fixed infrastructure has yet to be installed.

 

Fast to deploy, secure by design and built for harsh CNI conditions, the Rapidly Deployable Sensor Kit ensures your site remains protected when it matters most.

Features

  • Rapid deployment for fast reinstatement of security

  • Ideal for maintenance periods and temporary security coverage

  • Encrypted radio communication

  • Long-life battery life

  • No cabling required

  • Reliable wireless performance

  • Perfect for retrofit sites

  • Multi-layer intrusion detection

  • Multiple compatible detectors

  • Tested for use in harsh environmental conditions

  • High immunity to false alarms

  • On-alarm recorded audio capture

  • Designed to fit industry standard hatches, doors and access points

Attack Detection

  • Opening

  • Liquid ingress

  • Hammers

  • Chisels

  • Saws

  • Crowbars

  • Concrete grinders

  • Diamond-head drills

  • Hydraulic pressure tools

  • Hydro-jet cutting tools

  • Thermal cutting torches

  • Oxygen lances

  • Explosives

Immune to

  • Operational noises

  • Environmental influences

Alarm verification

  • Sensor recorded audio

  • Snapshot camera imagery

Compatible technology

Sensor - 4G

Standalone 4G intrusion detection for critical national infrastructure assets

The Standalone 4G Sensor is a fully self‑contained intrusion detection unit designed to protect individual access points, hatches and doors across critical infrastructure—without the need for cabling, analysers or supporting systems. Powered by an internal long‑life battery and equipped with an onboard 4G GSM modem, it provides reliable, CNI‑grade protection.

 

Using the same proven detection technologies as Sentinor’s other sensors—including seismic recognition algorithms, a toughened magnetic switch, a lever switch, and dual‑float switch integration—the 4G Sensor delivers multi‑layered detection with exceptional immunity to false alarms. It identifies genuine intrusion attempts while ignoring environmental noise, ensuring dependable performance in challenging operational environments.

 

When an attack is detected, the sensor transmits encrypted SMS alerts directly from the device, without the requirement of an Enhanced+ analyser. This makes it ideal for remote sites, isolated assets, or locations where full analyser‑based infrastructure is unavailable or unnecessary. Alerts can be sent straight to Sentinor’s FlightDesk system for centralised monitoring, or directly to designated operational contacts for immediate action.

 

Engineered for clean installation, the battery‑powered design allows the sensor to be fitted to a wide range of industry‑standard hatches and doors with minimal disruption. Its robust construction and environmental resilience ensure consistent performance across harsh and exposed CNI environments.

 

Compact, autonomous and highly secure, the Standalone 4G Sensor offers a powerful protection solution for single‑point assets—providing reliable intrusion alerts wherever they’re needed most.

Features

  • Standalone intrusion detection sensor

  • Ideal for single-point assets and isolated infrastructure

  • Encrypted 4G SMS communication

  • Send SMS alerts directly from the sensor

  • Battery powered

  • Multi-layer intrusion detection

  • Multiple compatible detectors

  • Tested for use in harsh environmental conditions

  • High immunity to false alarms

  • On-alarm recorded audio capture

  • Designed to fit industry standard hatches, doors and access points

Attack Detection

  • Opening

  • Liquid ingress

  • Hammers

  • Chisels

  • Saws

  • Crowbars

  • Concrete grinders

  • Diamond-head drills

  • Hydraulic pressure tools

  • Hydro-jet cutting tools

  • Thermal cutting torches

  • Oxygen lances

  • Explosives

Immune to

  • Operational noises

  • Environmental influences

Compatible technology

  • FlightDesk

  • Modem Collection Rack

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