Operating Range may be limited by the focus of the light collection optics as well as the maximum distance at which light is reflected to the sensor. The operating range at which a sensor can pick up reflective light and obtain an accurate distance measurement.
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Self-contained unit that produces output locally (with signal processing).
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Arrays of beams are used for measurement. Typically includes an oscillating mirror.
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Many instruments allow for the status and readings of the instruments to be monitored from a PC or other remote location. In addition to monitoring, interfaces can also allow the initiation of test cycles and configuration changes of the unit via varying interface options.
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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Uses a laser diode to create a point or line by projecting a beam of energy through a lens or off a rotating mirror or prism. It allows for a large depth of field.
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Time of flight sensors derive range from the time it takes light to travel from the sensor to the target and return. Some methods time a single round trip directly, and some use other techniques to calculate the range from many cycles of light.
For very long range distance measurements (up to many miles) "time-of-flight" laser rangefinders using pulsed laser beams are used. The laser emits very brief, very intense pulses of light. The amount of time the pulse takes to reach the target and return is measured and converted to a distance measurement.
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