© 2019 by Sensor Driven Ltd

Meet our new multi-parameter event logger

Sensor Driven's first end-user product is an event logger:

  • 3-axis shock excursion logging

  • Temperature excursion logging

  • Wet detection

  • NFC readout

  • 20-year battery life

  • 50mm in diameter, 10mm thick

Self-energising event detectors

Sensor Driven's detectors chips use energy from the event to be detected, to activate sensor electronics. Please see the introductory video below (4 minutes). 

This technology originated in the Electrical Energy Management Research Group, at the University of Bristol, and is now licensed to Sensor Driven Ltd.

Nanowatt sensors

Based on self-energising event detectors, we have developed the ability to monitor many active and passive transducers, with detection thresholds down to 10 millivolt, consuming only around 10 nanowatts. When detectors are triggered, the sensor consumes around 1 microjoule to check and log the event. As a result, decades of lifetime are obtained from a coin cell, if the events occur less than once a minute. 

Detection parameters

Sensor-driven alerts can be generated from:

  • Temperature, overheating, frost

  • Sound, ultra-sound, sonic remote control

  • Ingress, leakage, humidity

  • Motion, vibration, tampering, theft, subsidence, acceleration

  • Voltage and current signals

  • Structural damage, cracks, crack propagation, impact

  • Pressure, strain, breakage, intrusion

  • Magnetic fields, proximity sensors

  • Presence, ballistics

  • Light, infrared, remote control

  • Radio-frequency signals, inductive or capacitive transfer

  • Chemical concentration

Features, advantages, and benefits

Sensor-driven detection versus periodic sampling

Most sensors are periodically polled to check if the signal exceeds a defined threshold. Power is consumed both when polling and when sleeping between measurements. High frequency signals require rapid polling to avoid missing an event, and measurement power limits battery lifetime. Slowly changing signals can be sampled infrequently and sleep power limits battery lifetime.​

Sensor Driven's self-energising event detectors, by contrast, are continuously aware, as they use the sensor signal as their wake-up call and power source.  They do not consume battery power sleeping, nor do they measure irrelevant information. All battery resources are directed towards relevant events, enabling ultra-long lifetimes and very small batteries.

Samples and datasheets

We have provided a number of companies with self-energising event detector chips. If you would like to collaborate on a new product, please contact us.

UB20M general-purpose detector

0.6 V detection threshold

20 V maximum input voltage

5.4 pA input current @ 1 V

SOT-23 package

UB20M datasheet

UB20M breakout board datasheet