Product category: Sensors and Data Acquisition
News Release from: Quantum Research Group | Subject: QT114 QLevel QT sensor
Edited by the Electronicstalk Editorial Team on 12 June 2001
Level sensing IC senses two trip points
Quantum Research Group's QT114 QLevel QT sensor IC is specifically designed to detect point level in fluids and powders
It has the unique capability of independently sensing two trip points when used with structured electrodes having two tiers. It will project a sense field through almost any dielectric, like glass, plastic or ceramic, to sense level on the inside of a vessel, from its exterior. The QT114 requires only a single inexpensive capacitor in order to function.
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One or two LEDs can also be added to provide a visual sensing indication.
Another novel feature is the 'slosh filter', a detection integrator which averages detections over a rolling 15s interval before activating or deactivating the output pins.
This filter allows use of the QT114 with violently moving fluids, for example in a moving vehicle, that would otherwise cause the outputs to flicker between two states.
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The QT114 employs Quantum's patented burst-mode charge transfer sensing methods and additional patent-pending methods.
The device also includes selectable output polarity, allowing both output lines to be made either active-high or active-low.
It also includes the Quantum-pioneered HeartBeat signal, allowing a host controller to monitor the health of the QT114 continuously if desired.
By using the charge transfer principle, the IC delivers a level of performance clearly superior to older technologies.
It is specifically designed to replace electromechanical devices like float switches, thermistors and conductance probes.
Power consumption is under 20uA in most applications, allowing operation from lithium cells for many years.
No external switches, op amps, or other analogue components aside from capacitors are required.
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