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Displacement Transducers - DC Operation
Columbia Research Laboratories
The Columbia DDCP Series Transducers are completely self-contained displacement measurement systems that operate from a low voltage DC power supply or battery. They permit highly accurate readout and recording of an output signal directly without auxiliary signal conditioning electronics.
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Displacement Transducers [mm]
The Displacement Transducers are for use in precision measurement in the m range to simple displacement monitoring during manufacturing and assembly or the supervision of construction projects.
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Circuit Breaker Analyzers & Timers
CAT circuit breaker analyzers and timers are advanced standalone or a PC controlled instruments for circuit breaker maintenance. Typical application areas of CAT instruments are medium and high voltage substations at electric power generation, transmission, and factories of switchgear. Also, industrial environments and electric power distribution are suitable application areas for these circuit breaker testing instruments.DV Power CAT circuit breaker testing instruments are portable and lightweight. They are designed for performing mechanical operations intended for circuit breakers testing according to standards IEC 62271-100 and IEEE C37.09.These instruments measure:the timing of main contacts, pre-insertion resistor contacts, auxiliary contacts operations,coil currents,motion parameters,voltage recording,main circuit resistance,arcing contacts wipe,and any relevant analog signal.Motion transducer channels provide measuring a displacement of the circuit breaker moving parts, contact wipe, over-travel, rebound, damping time, and average velocity. Even more, CAT circuit breaker analyzer optionally has a built-in micro-ohmmeter. Hence, it provides the main circuit resistance measurement and dynamic resistance measurement. Dynamic resistance measurement is an effective method for arcing contacts condition assessment.
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Seismic Sensors & Transducers
Displacement Pickups are vibration transducers that incorporate a spring-mass system with eddy-current damping using a frictionless pivot. This pivot is a spring flexure that serves as the ‘spring’ and a moment arm attached to the pivot serves as the ‘mass’, which allows resolutions down to the micro inch range. At frequencies above 50Hz, the mass remains fixed in space and becomes an inertial reference. A transducer within the pickup senses the motion of the mounting base relative to the inertial reference and converts it into a proportional signal. Appropriate damping results in a frequency response flat down to 10 Hz. Note that the pickup senses in only one plane, which is perpendicular to the mounting base.
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Acquisition Of 16 Displacement Transducers
APCI-3701-16
PCI interface to the 32-bit data bus Acquisition of 16 inductive displacement transducers (Half Bridge, LVDT) 16 input channels ± 10 V 16-bit resolution Measuring frequency up to 100 kHz Conversion can be triggered through software End of conversion can be inquired through software Possibility of interrupt through digital input channels (when a data or a time value is exceeded) PCI-DMA access Onboard FIFO buffers Sequence RAM 16 isolated digital I/O, 24 V Software operation Supported inductive transducers for APCI-3701Standard board APCI-3701-8 or APCI-3701-16Transducer type:
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Displacement Transducers
Displacement transducers, non-contact displacement sensors, LVDT sensors, LVIT sensors and potentiometers with a variety of electrical outputs to measure and transmit travel ranges.
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Voltage Meter
MDN8I
MDN8I is a mezzanine module designed for high-precision measurements in dynamic signal analysis systems, as well as for joint work with ICP sensors and vibration transducers with a charge output (force sensors, dynamic pressure, acoustic emission, vibration displacement, etc.). The MDN8I mezzanine module has electrical characteristics no worse than those of most foreign and domestic counterparts, and in some parameters exceeds them.
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LVDT to Digital-RVDT to Digital Converters
Computer Conversions Corporation
LVDT Displacement transducers accurately measure position and displacement. The strength of the LVDT is in its principle of operation. As LVDT sensors are inductive, there is no electrical connection across the sensor, which ensures clean, accurate data and a long life.
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Exciter Head
The Exciter Head, with its force and displacement transducers, generates and measures the force or torque to the structure being tested and provides feedback signals for control of the test variables.
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LVDT to Digital and RVDT to Digital Converters
Computer Conversions Corporation
LVDT Displacement transducers accurately measure position and displacement. The strength of the LVDT is in its principle of operation. As LVDT sensors are inductive, there is no electrical connection across the sensor, which ensures clean, accurate data and a long life.
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Extensometers for Indirect Tensile Testing of Asphalt
Model 3911
Jinan Testing Equipment IE Corporation
For indirect tensile testing, such as for resilient modulus, these extensometers measure the lateral deformation of specimens. They are self-supporting on the sample and clip on in seconds. The traditional way this deformation has been measured was prone to errors caused by slight rocking of the sample as it is loaded. The self-supporting design of the Model 3911 eliminates this problem. This unit will handle the dynamic pulse requirements of resilient modulus testing.The speed of mounting makes test set-up much faster than with the older method. The pivot mounting used ensures that the specimen contact pads meet the often uneven asphalt surface as well as possible. The measuring range options available allow a wide range of testing, yet can easily measure the sometimes very small displacements required.The Model 3911 extensometers are strain gaged devices, making them compatible with any electronics designed for strain gaged transducers. Most often they are connected to a test machine controller. The signal conditioning electronics for the extensometer is typically included with the test machine controller or may often be added. In this case the extensometer is shipped with the proper connector and wiring to plug directly into the electronics. For systems lacking the required electronics, Epsilon can provide a variety of solutions, allowing the extensometer output to be connected to data acquisition boards, chart recorders or other equipment.
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Servo type Accelerometer
A motion is sensed by a displacement detector, a current is fed to the coil to get back the pendulum mass to the original position. This current will be proportional to the acceleration, that is converted to an output voltage. The Servo type accelerometer is for the Earthquake Monitoring or measurements of micro tremor on the Civil Engineering Structures because of its higher sensitivity and stability or more accurate phase responses in the lower frequency range than those of other vibration transducers.
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Portable Digital Manometer
PS309
Featured are an integral variable reluctance transducer, solid state electronics module, 3 digit liquid crystal display (LCD)* and battery pack with six 1.5V penlight cells for truly portable operation. The units can also be powered from an external DC power supply or AC battery eliminator (converter) module. The transducer features all corrosion resistant materials in contact with the pressure media (both ports in differential units), very low internal cavity volumes and ultra-low volumetric displacement with full-scale pressure excursion. Transducer calibration is unaffected by dielectric properties of the sensed fluid. Gauge and differential transducers may be disassembled and range changed by simple diaphragm replacement.
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PXI/PXIe LVDT, RVDT, Resolver Simulator Modules
Linear variable differential transformers (LVDT) are electrical transformer sensors to measure linear displacement. Driven by an AC excitation source, the LVDT generates a pair of AC output signals modulated according to the core's mechanical position (displacement). LVDTs have been widely used in applications such as power turbines, hydraulics, automation, aircraft, satellites, nuclear reactors, and many others. These transducers have low hysteresis and excellent repeatability.
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Digital to LVDT-Digital to RVDT Converters
Computer Conversions Corporation
The SLVT Series are complete, low profile, continuously updating, single channel, Isolated Digital to LVDT Converters used to simulate the output of LVDT's (Linear velocity displacement transducers), RVDT's (Rotary...) and other phase/voltage sensitive AC devices.
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High Speed・High Accuracy Eddy Current Type Digital Displacement Sensor
GP-X
Panasonic Industrial Devices Sales Company of America
The inductive displacement transducers of the GP-X Series use eddy current techniques and are particularly noted for their highly accurate measurement at a resolution of 0.02% F.S. with minimal linearity error, a high sampling frequency of 40kHz and low temperature dependence. GP-X Series Sensors are ideally suitable for the highly accurate motion and distance control of metal objects in harsh industrial environments.
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Hardy Shaker
HI-903
This is our top of the line Hardy Shaker. It provides the ability to set the amplitude and change the frequency range without the amplitude changing. This automation makes conducting vibration tests easier. Tests can be conducted on multiple vibration transducers, and then the saved data can be transferred via USB Flash Drive to be displayed in an automated and customizable report using an Excel template on your computer. In manual mode, the vibration test level and test frequency can be set from 7 Hz to 10,000 Hz. The high accuracy instrument can display the vibration level in terms of g’s peak, velocity peak (in/sec or mm/s) or displacement peak-to-peak (mils or µm). The unit can support payloads up to 800 grams (see frequency limits in the manual). A built-in display reads the output sensitivity, which can be stored in memory. Complete testing sequences and data can be stored in memory for each tested sensor, the unit logs the data on the spot or stores it for later use. For testing of heavy transducers or at high frequencies, the HI-903 automatically corrects the sensitivity calculation for the effects of transducer mass loading. A built-in self-test program checks for accuracy of all calculations. The HI-903 has a built-in battery charger that can operate on 120 or 240 VAC. The unit comes in a rugged Pelican case.
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LVDC Series
Computer Conversions Corporation
LVDT Displacement transducers accurately measure position and displacement. The strength of the LVDT is in its principle of operation. As LVDT sensors are inductive, there is no electrical connection across the sensor, which ensures clean, accurate data and a long life.
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Displacement Transducers
Displacement transducers are suitable for direct, accurate measurement of displacements in automatic control and metrology.
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Displacement Sensing Products
Ideal for precise micro-position measurements, our miniature linear variable displacement transducers (LVDTs) provide accurate, repeatable measurement. Inductive contact, non-contact, slide, and spring-actuated sensors are available in various stroke lengths-- ideal in spaces where traditional LVDTs are too large. Our sensors operate in harsh environments over millions of cycles without degradation in performance
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DC to LVDT and DC to RVDT Converters
Computer Conversions Corporation
The SLVT Series are complete, low profile, continuously updating, single channel, Isolated Digital to LVDT Converters used to simulate the output of LVDT's (Linear velocity displacement transducers), RVDT's (Rotary...) and other phase/voltage sensitive AC devices. They provide a very precise linear AC voltage output proportionate to the magnitude of the input data, in or out of phase respective of the AC reference input as determined by the MSB of the input word (offset binary format).
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Circuit Breaker Analyzers & Timers
CAT Advanced Series
DV Power circuit breaker analyzer and timer utilizes the latest technological enhancements for safe and fast testing of circuit breakers. The sophisticated design ensures efficient and reliable operations in high-voltage substations and industrial environments.The CAT Advanced series are stand-alone or PC-controlled digital instruments for a circuit breaker testing. The timing channels record closing and an opening of the arcing, resistor, and auxiliary contacts. Also, the main contact channels can measure the resistance value of the pre-insertion resistors (if present in the circuit breaker).With CAT Advanced series instruments, it is possible to record graphs of open and close coil currents. Furthermore, it records displacements of the HV and MV circuit breaker moving parts. Test results can be saved via USB, PC or be printed via 112 mm (4.4 inches) thermal printer (optional accessory) in tabular and graphical form.A circuit breaker test consists of different operational modes and CAT Advanced series supports:Open (O)Close (C)Reclose (O-0,3s-C)Trip free (CO)O-0,3s-COOpen-Close (O-C)Close-Open (C-O)Open-Close-Open (O-C-O)First trip (O)Multiple operations, such as Open-Close and Open-Close-Open, can be initiated by using a predefined delay time or by sensing a breaker’s contact position.The auxiliary inputs are used to monitor dry and wet auxiliary contacts. The six coil control analog channels measure and record coil currents simultaneously (OPEN and CLOSE), up to 35 A AC/DC.The additional six voltage analog channels have four selectable voltage ranges available (±1 V, ±5 V, ±60 V and ±300 V AC/DC).A built-in micro-ohmmeter generates up to 500A true DC ripple-free current with an automatically regulated test ramp that provides performing static and dynamic contact resistance measurement.Three transducer channels provide a measuring displacement of the circuit breaker moving parts, contact wipe, over-travel, rebound, damping time and average velocity. Also, a user can connect either an analog or a digital transducer to these universal channels.
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Displacement and Encoders
INCREMENTAL digital Transducers are mainly designed for displacement measurement in machine tools and other industrial applications. The sensors are characterized by high precision and are absolutely dust and waterproof. The used materials permit applications in heavy industrial environments.DISPLACEMENT Transducers are suitable for measurements of small distances up to 50mm. They are characterized by high accuracy and repeatability, reliability and fast response. Digital ENCODERS operate on optical or magnetical principal and are offered with incremental or absolute coded outputs. They are suitable for precision industrial applications.
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Digital to LVDT RVDT Converters
DLVT
Computer Conversions Corporation
The SLVT Series are complete, low profile, continuously updating, single channel, Isolated Digital to LVDT Converters used to simulate the output of LVDT's (Linear velocity displacement transducers), RVDT's (Rotary...) and other phase/voltage sensitive AC devices.
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Linear Variable Differential Transformers (LVDTs)
Whilst there are several ways to measure displacement, the Linear Variable Differential Transformer (LVDT) remains a popular transducer in most industrial applications. LVDTs initially were used as a means of taking dimensional readings in laboratories. They gained popularity in a wide variety of industrial monitoring and control applications, and whilst an LVDT is used to measure displacement the technology can be employed within other transducer types.
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Low Pressure Variable Reluctance Sensor
DP45
The Validyne DP45 Very Low Differential Pressure Transducer is designed for extremely low pressure measurement in the order of 1 inch water column. This instrument is used extensively in connection with flow measurements where dynamic response at low flow rates is required. Dynamic line pressure effects are minimized due to the combination of low internal volume, symmetrical construction, and small volumetric displacement inherent in the DP45 design.
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Transducer Calibration
m+p SensCal
Regular transducer calibration is an essential requirement for maintaining the accuracy, reliability and repeatability of the results obtained from a measurement system. m+p international’s m+p SensCal program provides a quick and simple process for calibrating accelerometers (piezo-electric with charge output or IEPE, piezo-resistive, capacitive) in your laboratory, as well as velocity or displacement transducers.
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Rod and Barrel Style (BLOK) LDT
AMETEK Sensors, Test & Calibration
The Rod and Barrel Style LDT – BLOK - Housing is designed for applications where mounting a standalone Rod or Profile Style Linear Displacement Transducer, is prohibitive. This housing style adds a chamber, magnet and piston. The aluminum extrusion houses the sensing element and electronics.
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Bi-Axial or Axial Averaging Extensometers
Model 3560
Jinan Testing Equipment IE Corporation
This extensometer is ideally suited for testing anisotropic materials such as advanced composites as well as for general purpose tests like determining Poisson’s ratio. The Model 3560BIA uses a design unique to Epsilon, where the knife edges remain parallel during the displacement. This approach greatly reduces crosstalk between axes and allows use on round or flat specimens with equal ease. These extensometers are very easy to mount. Integral springs hold the unit on the test sample. The parallel multiple flexure design makes these units very durable.The Model 3560AVG reads axial strain only as a single averaged output. It may also be supplied with two independent outputs, one measurement from each side of the specimen. This set-up is most commonly required when an indication of specimen bending is desired. The second version, the Model 3560BIA, includes both the averaged axial strain and the transverse strain. Again, this may also be configured as dual independent axial readings, which results in a three channel extensometer.The Model 3560 extensometers are strain gaged devices, making them compatible with any electronics designed for strain gaged transducers. Most often they are connected to a test machine controller. The signal conditioning electronics for the extensometer is typically included with the test machine controller or may often be added. In this case the extensometer is shipped with the proper connector and wiring to plug directly into the electronics. For systems lacking the required electronics, Epsilon can provide a variety of solutions, allowing the extensometer output to be connected to data acquisition boards, chart recorders or other equipment.
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Digital LVDT sensor ZET 7111-L
ZET 7111-L is a digital LVDT displacement sensor. It requires no special adjustment and starts measuring right after power is on. Displacement measured values are transferred in digital form via CAN interface. The LVDT digital sensor consists of a primary transducer (LVDT sensor) and a measuring element (ZET 7111-L unit). The LVDT sensor converts meaured object (to which it is mechanically connected) linear displacement into electric signal to be further transferred into displacement values by the measurement module.
