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  2. Distributed temperature sensing - Wikipedia

    en.wikipedia.org/wiki/Distributed_temperature...

    For distributed temperature sensing often a code correlation technology is employed which carries elements from both principles. OTDR was developed more than 20 years ago and has become the industry standard for telecom loss measurements which detects the—compared to Raman signal very dominant— Rayleigh backscattering signals.

  3. Accelerometer - Wikipedia

    en.wikipedia.org/wiki/Accelerometer

    Accelerometer. An accelerometer is a device that measures the proper acceleration of an object. [1] Proper acceleration is the acceleration (the rate of change of velocity) of the object relative to an observer who is in free fall (that is, relative to an inertial frame of reference ). [2] Proper acceleration is different from coordinate ...

  4. Passive infrared sensor - Wikipedia

    en.wikipedia.org/wiki/Passive_infrared_sensor

    A passive infrared sensor ( PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors. PIR sensors are commonly used in security alarms and automatic lighting applications. PIR sensors detect general movement, but do not give ...

  5. Surface acoustic wave sensor - Wikipedia

    en.wikipedia.org/wiki/Surface_acoustic_wave_sensor

    A surface acoustic wave temperature sensor can be fashioned from a piezoelectric substrate with a relatively high coefficient of thermal expansion in the direction of the length of the device. Temperature sensing and strain sensing can be combined into a single device in order to deliver temperature compensation of the sensing system.

  6. List of temperature sensors - Wikipedia

    en.wikipedia.org/wiki/List_of_temperature_sensors

    The integrated circuit sensor may come in a variety of interfaces — analogue or digital; for digital, these could be Serial Peripheral Interface, SMBus/I 2 C or 1-Wire.. In OpenBSD, many of the I 2 C temperature sensors from the below list have been supported and are accessible through the generalised hardware sensors framework since OpenBSD 3.9 (2006),: §6.1 which has also included an ad ...

  7. Heat flux sensor - Wikipedia

    en.wikipedia.org/wiki/Heat_flux_sensor

    A heat flux sensor is a transducer that generates an electrical signal proportional to the total heat rate applied to the surface of the sensor. The measured heat rate is divided by the surface area of the sensor to determine the heat flux . Silicon encased heat flux sensor for measurements on rugged surfaces.

  8. Catalytic bead sensor - Wikipedia

    en.wikipedia.org/wiki/Catalytic_bead_sensor

    Passing combustible gas raises the temperature further which increases the resistance of the platinum coil in the catalysed bead, leading to an imbalance of the bridge. This output change is linear, for most gases, up to and beyond 100% LEL , response time is a few seconds to detect alarm levels (around 20% LEL), [1] at least 12% oxygen by ...

  9. Tempdrop Is A Wearable Body Temperature Sensor ... - TechCrunch

    techcrunch.com/2014/04/11/tempdrop-is-a-wearable...

    Tags. Tempdrop is a wearable sensor that makes it easy for people to monitor and record their basal body temperatures. That data can be integrated by developers into any fertility app with few ...