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The CCD consists of several individual elements that have the capability of collecting, storing and transporting electrical charge from one element to another.
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Often called a transmitter. A current is imposed on the output circuit proportional to the measurement. Feedback is used to provide the appropriate current regardless of line noise, impedance, etc. Useful when sending signals long distances.
The output signal is encoded via amplitude modulation (AM), frequency modulation (FM), or some other modulation scheme, but the signal is still analog in nature.
An "output" of a change in state of switches or alarms.
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Several sources and sensors combine to measure two-dimensional area.
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Low power visible lasers or laser systems, which, because of normal human aversion responses, do not normally present a hazard, but may present some potential for hazard if viewed directly for extended periods of time (ANSI).
Class IIIa - Lasers or laser systems that normally would not produce a hazard if viewed for only momentary periods with the unaided eye. They may present a hazard if viewed using collecting optics (ANSI).
Class IIIb - Lasers or laser systems that can produce a hazard if viewed directly. This includes intrabeam viewing or specular reflections. Except for the high power class 3b lasers, this class laser will not produce a hazardous diffuse reflection (ANSI).
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The 'Category' criteria attempts to distinguish sensor elements that might be used as part of a larger sensor from integrated sensor-gauges and instruments.
A self-contained unit that provides an output (typically a display) locally at or near the device. Usually also includes signal processing/conditioning.
A device that records several data points or totalizes measurement in some fashion and which may include sophisticated functions such as statistical analysis.
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This is the full required range of ambient operating temperature.
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