Help with Linear Velocity Sensors specifications:
Performance Specifications
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| Maximum Velocity: | The maximum linear velocity that can be measured. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Maximum Measurement Range: | The maximum range or distance at which the sensor can measure speed. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Accuracy: | The measurement accuracy of the device, measured in ±% full scale. Accuracy can have somewhat varying definitions, and can include Nonliniarity, hysteresis, and measurement resolution. | ||
| Search Logic: | All matching products will have a value less than or equal to the specified value. | ||
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| Operating Temperature: | Full required range of operating temperature. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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Technology
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| Your choices are... | |||
| Cable Extension | For cable extension devices, moving object is attached to a cable, which is typically connected to a potentiometer. As the object moves, the potentiometer's resistance value changes. | ||
| Magnetic Induction | Magnetic induction sensors are a non-contact technology type of sensor that relies on an induced current from a magnetic field to measure the linear velocity. | ||
| Microwave | Sensor uses microwave technology to determine speed. | ||
| Optical / Laser | Sensor uses fiber optics or laser technology to determine speed. | ||
| Piezoelectric | For piezoelectric devices, a piezoelectric material is compressed and generates a charge, which is measured by a charge amplifier. Often used in vibration velocity measurement applications. | ||
| Radar / Radio Frequency | Sensor emits radar wave, which is reflected by surface and returned to sensor. Speed is determined by measuring frequency difference (Doppler Effect). | ||
| Strain Gauge | For strain gage devices, strain gages (strain-sensitive variable resistors) are bonded to parts of the structure, which deform when making the measurement. These strain gages are typically used as elements in a Wheatstone bridge circuit, which is used to make the measurement. | ||
| Ultrasonic | Sensor emits an ultrasonic pulse, which is reflected by surface and returned to sensor. Speed is determined by measuring frequency difference (Doppler Effect). | ||
| Other | Other unlisted, specialized, or proprietary technology. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Electrical Output / Interface
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| The type of electrical signal that will be produced. | |||
| Your choices are... | |||
| Voltage | Output voltage is a simple (usually linear) function of the velocity measurement. | ||
| Current | Analog current output such as 0-20mA, 4-20 mA, etc.; 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. | ||
| RF / Radio | The output signal is encoded in radio frequency and transmitted wirelessly to a receiver. | ||
| Switch / Alarm | An output of a change in state of switches; includes alarm switching or triggering. | ||
| Serial | A standard digital output protocol (serial) such as RS232, RS422, RS485, or USB. | ||
| Parallel | A standard digital output protocol (parallel) such as IEEE488, etc. | ||
| DeviceNet | Utilizing CAN protocol, DeviceNet is a network designed to connect industrial devices such as limit switches, photoelectric cells, valve manifolds, motor starters, drives, and operator displays to PLCs and PCs. | ||
| Ethernet | A local-area network (LAN) protocol developed by Xerox Corporation in cooperation with DEC and Intel in 1976. Ethernet uses a bus or star topology and supports data transfer rates of 10 Mbps. The Ethernet specification served as the basis for the IEEE 802.3 standard, which specifies the physical and lower software layers. Ethernet uses the CSMA/CD access method to handle simultaneous demands. It is one of the most widely implemented LAN standards. | ||
| SERCOS | (SErial Real-time COmmunications System) is an open controller-to-intelligent digital drive interface specification, designed for high-speed serial communication of standardized closed-loop data in real-time over a noise-immune, fiber optic cable. | ||
| SSI | Serial Synchronous Interface (SSI). A general standard for absolute encoders. The physical interface consists of two differential connections aside from power and ground. The controller provides a clock input, and the sensor returns a data signal synchronized to the clock. | ||
| TTL Compatible | Transistor-to-transistor logic (TTL) consists of multiple transistors forming logic gates for conditional switch output. TTL Compatible refers to a logical output of 1 for voltages 2.4V to 5.5V, and a logical output of 0 for voltage levels from 0 to 0.6V. | ||
| Other | Other unlisted, specialized, or proprietary electrical output or interface. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Device Category
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| The purpose of this question is to separate items into general categories based upon what the item is designed to do, or the manner in which it is used. | |||
| Your choices are... | |||
| Sensor Element / Chip | Denotes a raw sensor element with no packaging or signal conditioning. | ||
| Sensor / Transducer | A more complex device with packaging and/or signal conditioning that is powered and provides an output such as DC volts, 4-20mA, etc. | ||
| Instrument / Meter | Typically a self-contained unit that provides an output such as a display on or near the device. Usually also includes signal processing / conditioning. | ||
| Gauge / Indicator | A device, which typically has an analog display such as a needle and no electronic output. | ||
| Recorder / Totalizer | More complex device that records, totalizes, and/or analyzes measurement data. May have a computer interface. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Features & Options
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| Multi-axis | Measures velocity or other parameters in multiple, often, orthogonal, axes. Multi-axis measurement may be simultaneous or switchable. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Vehicular / Transportation Application | Velocity measurement is geared toward applications such as automotive, aerospace, rail, or marine transport. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Intrinsically Safe | Intrinsically safe (IS) is an adjective for equipment and wiring which is incapable of releasing sufficient electrical or thermal energy under normal or abnormal conditions to cause ignition of a specific hazardous atmospheric mixture in its most ignited concentration. The IS terminations and wiring may be brought into any hazardous location of any group classification for which it is accepted without requiring explosion proof housing or other means of protection. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Additional Measurements | |||
| Your choices are... | |||
| Diameter | Roll diameter measurement in winding, unwinding, web, or sheet applications. | ||
| Direction | Includes directional measurement in applications where direction of measured velocity can change. | ||
| Distance / Displacement | The displacement of the measured object, or total distance traveled, can be measured and captured. | ||
| Flow | Velocity sensor whose configuration and output is designed for flow measurement. | ||
| Length | Length measurements for applications such as winding or unwinding of web, fiber, or wire. | ||
| Thickness | Velocity sensor that can be applied for thickness measurement of plates, sheets, film, etc. | ||
| Tilt / Angle | Sometimes used in vehicular, aircraft, or marine craft motion measurement. | ||
| Vibration | Sensors for measuring peak or RMS velocity levels in vibration analysis. | ||
| Other | Unlisted or specialized parameter measurement. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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