Information about Sensor Transmitters

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About Sensor Transmitters

Sensor transmitters are measurement or signal conditioning packages that provide standard, calibrated outputs from sensors or transducers. Outputs types include current loops, variable voltage levels, frequency or pulse signals, timers or counters, relays, and variable resistance outputs. Sensor transmitters can also provide radio frequency (RF) signals and transistor-transistor logic (TTL) outputs. Current loops such as 4 – 20 mA are suitable for sending signals over long distances. Typically, a current is imposed on the output circuit proportional to the measurement. Feedback is used to provide the appropriate current regardless of line noise and impedance. Variable voltage outputs are simple, usually linear functions of the measurement. Frequency or modulated frequency outputs for sensor transmitters include amplitude modulation (AM), frequency modulation (FM), sine waves, and pulse trains.

Products & Services Related to Sensor Transmitters

Analog-to-Digital Converters

Analog-to-digital converters (ADC) sample an analog signal and convert it to a series of digital values to represent the signal to a computer processor.

Bridge Conditioners

Bridge conditioners are instruments that provide excitation and support for strain gages, Wheatstone bridges, load cells, and sensors. They also include circuitry for signal conditioning, amplification, and processing.

Data Acquisition

Data acquisition is the digitizing and processing of multiple sensor or signal inputs for the purpose of monitoring, analyzing and/or controlling systems and processes. Signal conditioning includes the amplification, filtering, converting, and other processes required to make sensor output suitable for rereading by computer boards.

Frequency-to-Voltage Converters

Frequency-to-voltage converters accept a signal and convert its frequency to a corresponding analog voltage level.

Signal Filters

Signal filters block or decrease (attenuate) unwanted frequencies or signal wave characteristics.

Temperature Signal Conditioners

Temperature signal conditioners accept outputs from temperature measurement devices such as resistance temperature detectors (RTDs), thermocouples, and thermistors. They then filter, amplify, and/or convert these outputs to digital signals, or to levels suitable for digitization.

Voltage-to-Frequency Converters

Voltage-to-frequency converters accept a voltage signal and convert its analog level to a signal with a corresponding frequency.

Engineering Web: Sensor Transmitters - Machine Design

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Current-Loop Transmitters \| Machine Design The transmitters from Burr-Brown Corp., Tucson, target applications where sensor signals are processed with microcontrollers because electrical power
Depth And Pressure Sensor \| Machine Design Depth And Pressure Sensor February 23, 2006
Electrical & Electronic \| Machine Design Single-Point Sensor The SPR-04 sensor is a CCD-based single-point sensor for measuring distance, thickness, and material deformation.

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