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Measurement Range:
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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Accuracy:
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The accuracy you require of the device.
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Search Logic:
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All matching products will have a value less than or equal to the specified value.
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Electrical Output
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The type of electrical signal that will be produced.
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Your choices are...
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Analog Voltage
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Output voltage is a simple (usually linear) function of the measurement.
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Analog Current
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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.
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Analog / Modulated Frequency
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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.
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Switch / Alarm
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An "output" of a change in state of switches or alarms
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Serial
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A standard digital output protocol (serial) such as RS232, etc.
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Parallel
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A standard digital output protocol (parallel) such as IEEE488, etc.
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Other
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Any digital output other than the standard serial or parallel signals. Simple TTL logic signals are an example.
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Search Logic:
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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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Category of Device
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You can think of products as belonging to general categories based on what they are designed to do and what you have to do to use them. The 'category' criteria attempts to distinguish 'unpacked' sensors that might be used as part of a larger sensor from, say, a gauge which can be read just by looking at it.
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Your choices are...
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Sensor Element / Chip
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Denotes a "raw" device such as a thermocouple, or one with no packaging.
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Sensor / Transducer
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A more complex device with packaging and/or signal conditioning that is powered and provides an output such as dc volts, 4-20mA, etc. (ex: a pressure sensor with 4-20mA output).
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Instrument / Meter
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A (usually) self-contained unit that provides an output (typically a display) locally at or near the device. Usually also includes signal processing/conditioning. Example: a hand-held voltmeter.
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Gauge / Indicator
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A device that has a (usually analog) display and no electronic output. Example: a pressure gauge.
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Recorder / Totalizer
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Records measured values or accumulates totals; may include statistical functions.
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Search Logic:
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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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Sensor Technology:
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Your choices are...
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LVDT
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A linear variable differential transformer, or LVDT, is a series of inductors in a hollow cylindrical shaft and a solid cylindrical core. The LVDT produces an electrical output proportional to the position of the core. The LVDT may be used in many different types of measuring devices that need to convert changes in physical position to an electrical output. The lack of friction between the hollow shaft and the core prolong the life of the LVDT and enable very good resolution. In addition, the small mass of the core allows for good sensitivity in dynamic tests.
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Linear Encoder
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Linear encoders sense and digitize linear position change for position measurement and feedback to control systems. Encoder technologies include optical encoders used in linear glass scales, magnetostrictive sensors, and conversion of linear motion, to rotary motion via a rack and pinion, to rotary encoders of various types.
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Linear Potentiometer
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A linear potentiometer is a sensor that produces a resistance output proportional to the displacement or position. The resistance element is excited by either DC or AC voltage, and the output voltage is ideally a linear function of the input displacement.
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Capacitance
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Capacitance-based instrumentation is designed primarily to take noncontact measurements of position, displacement, vibration, and run out or thickness measurements. These sensors can be used on conductive and nonconductive target materials, but can be sensitive to environmental parameters that change the dielectric constant of the medium between the sensor and the target (usually air).
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Eddy Current
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These noncontact linear position sensors usually contain two coils, one active coil that is influenced by the presence of a conducting target, and a second coil that completes a bridge circuit and provides temperature compensation. As the target comes closer to the probe, the eddy currents become stronger, which changes the impedance of the active coil and causes a bridge unbalance related to the target position.
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Fiber Optic
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A fiber optic element is a flexible strand of glass or plastic capable of transmitting light along its length by maintaining near total internal reflection of the light being accepted at its input end. A fiber optic displacement transducer uses an adjacent pair of fiber optic elements, one to carry light from a remote source to an object or target whose displacement or motion is to be measured, and the other to receive the light reflected from the object and carry it back to a remote photo sensitive detector.
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Inductive
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Inductive position sensors are noncontact devices that determine an object's coordinates (linear or angular) with respect to a reference. Displacement is measured when the object moves from one position to another at a specified distance (or angle). In other words, a position sensor is a linear device whose output signal represents the distance an object is from a reference point.
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Magnetoresistive
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A position sensor determines an object's coordinates (linear or angular) with respect to a reference, displacement means moving from one position to another for a specified distance (or angle). In other words, a position sensor is "a linear device whose output signal represents the distance an object is from a reference point."
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Magnetostrictive
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A position signal is developed from a current pulse sent down a magnetostrictive guide wire, interacting with a position magnet that moves with a linear-displacement rod protruding from the probe. The reflected pulse is sensed by a pickup sensor.
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Optical Time of Flight
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Time of flight sensors and instruments determine displacement and distance by measuring the time it takes light to travel from the instrument to a target and back. Some methods analyze a single trip while others calculate the measured range over a number of trips.
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Optical Triangulation
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Optical triangulation sensors use reflected waves, whose source may be a LED, infrared, or laser source to pinpoint position and displacement. A sensor, usually integrally housed with the emitter, detects the beam reflected off the surface or object and provides an output that varies with the distance. Optical triangulation equipment will typically have a reference distance or standoff. This is the measurement distance; the working range provides measurement for distances either more or less the reference distance.
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Ultrasonic
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An acoustical signal reflects off the target. The distance between the sensor and the target is calculated from the signal's return time and the propagation velocity of the measurement medium.
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Search Logic:
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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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Sensor Type:
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Your choices are...
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Contact
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The sensor element uses physical contact to measure the speed and / or postion of the object. These sensors tend to wear more over time.
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Non-Contact
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The sensor element uses non-contact techonologies, to measure the speed and / or postion of the object. These products generally show less wear over time.
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Search Logic:
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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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Operating Temperature:
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The temperature range over which the device must operate.
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Search Logic:
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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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Shock Rating:
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The maximum shock you require the device to survive. Items that are 'typical' may not explicitly give their Max Shock value, so it is a good idea to use this only when working with extremes.
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Search Logic:
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All matching products will have a value greater than or equal to the specified value.
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Vibration Rating:
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The maximum vibration you require the device to survive. Items that are 'typical' may not explicitly give their Max Vibration value, so it is a good idea to use this only when working with extremes.
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Search Logic:
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All matching products will have a value greater than or equal to the specified value.
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