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Battery-Free Leak Sensor Taps Nordic’s BLE SoC

A battery-free, self-powered leak detection device has been released by Canadian technology company, AquaSensing. “Leak Sensor 1.0” uses a proprietary sensor that acts as both power source and sensor for detecting water leaks, as well as Nordic Semiconductor’s nRF52832 Bluetooth 5.2/Bluetooth Low Energy (Bluetooth LE) multiprotocol System-on-Chip (SoC).

Leak Sensor 1.0 harvests energy from any fluid ingress to power the nRF52832 SoC-based Bluetooth LE radio that then wirelessly connects to the user’s Bluetooth 4.0 (and later) smartphone. From there the user can receive alerts of active leaks via an accompanying app, or alternatively via a text/email notification. Through the companion app users can also control and configure the Leak Sensor 1.0 device, pause notifications or mark them as resolved and share the leak details with third parties to act upon the alert.

The nRF52832 SoC provides Bluetooth 5 support including 2x on-air raw data bandwidth (2Mbps); 8x broadcasting ability with advertising extensions that increase the advertising packet payload size to 251 bytes, and an improved channel coexistence algorithm.

Leak Sensor 1.0’s small form factor makes it easy to install in any remote location, says the company. The inert materials used allow Leak Sensor 1.0 to remain operational for 20+ years, meaning the device can be safely hidden behind walls and in areas that are difficult to access during construction and manufacturing. The solution is scalable to cover large areas of complex buildings.

Nordic’s nRF52832 multiprotocol SoC combines a 64MHz, 32-bit Arm Cortex M4 processor with floating point unit (FPU), with a 2.4GHz multiprotocol radio (supporting Bluetooth 5.2, Bluetooth mesh, ANT, NFC, and 2.4GHz proprietary RF protocol software) featuring 4dBm output power -96dBm RX sensitivity for a link budget of 100 dBm, with 256/512kB flash memory and 32/64kB RAM.

Nordic Semiconductor | www.nordicsemi.com

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Battery-Free Leak Sensor Taps Nordic’s BLE SoC

by Circuit Cellar Staff time to read: 1 min