EM
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EMF Measurements/EM Measurements/Electromagnetic Radiation
Holland Shielding Systems B.V.
Electromagnetic fields cause interference in electronic devices and may affect the health of people close to where the fields are generated. It is important to recognize this at an early stage in a construction process, for instance at a future construction location or while construction is already underway, so that budgets are not exceeded. By means of field-strength measurements one can chart the existing electromagnetic fields and radiation emitted by GSM, UMTS antennas and transformer spaces, to mention a few examples. These measurements can help determine the best location in the new building for rooms where sensitive measurements are to take place, e.g. in hospitals or nano laboratories. And last but not least, field-strength measurements can detect sources of interference and can be part of a scheduled check of existing screened spaces and Faraday cages.
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Propagation Software
Wireless InSite
Wireless InSite is a suite of ray-tracing models and high-fidelity EM solvers for the analysis of site-specific radio propagation and wireless communication systems. The software provides efficient and accurate predictions of EM propagation and communication channel characteristics in complex urban, indoor, rural and mixed path environments.
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TEM Cells
Transverse Electro Magnetic (TEM) cell or Crawford cell (named after its inventor) is used to generate accurate electromagnetic waves over a wide frequency range: DC (0 Hz) to GHz., EM waves generated in the cell propagate in transverse mode and have the same characteristics as a plane wave. It can be used to calibrate E-field broadband probes for testing radiated E-field immunity as well as for measuring radiated emission from a product with a spectrum analyzer/EMI receiver.TEM cell generates a consistent electromagnetic field for testing small RF devices such as wireless pagers, receivers, portable phones, etc.
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Interference & Compatibility Evaluation System
ICEy
Schmid & Partner Engineering AG
ICEy is the most advanced reactive near-field E/H-field scanning system for the analysis of EM interference and compatibility (EMI/EMC) in highly integrated electronics. ICEy is the only system that provides accurate EM measurements traceable to international calibration standards and also allows independent interlaboratory comparability of EMI/EMC measurement results.
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Spiral Antenna
UHF Spiral antenna is a partial discharge sensor designed to receive electromagnetic (EM) emissions from a PD occurring in the monitored asset. It is a broadband antenna with a flat response which makes Spiral antenna suitable in a number of different applications. It has been optimized to operate in a frequency range typical for PD activity and it was designed to provide maximum sensitivity and high gain.
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TEM Antenna
TEM antenna is a broadband antenna with a flat response which makes TEM suitable in a number of different applications. It has been optimized to operate in a frequency range typical for PD activity and it was designed to provide maximum sensitivity and high gain. Its compact and robust design (passive sensor) makes TEM the optimal sensor for direct installation on medium voltage Switchgears and motors. It can be virtually applied in any electrical equipment provided that it has apertures or EM transparent surfaces.
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Operator Interfaces
Watlow Electric Manufacturing Company
Watlow offers reliable, affordable, easy-to-use interfaces for machines and systems. The Silver Series EM touchscreen operator interface terminals feature e-mail, USB, data logging, password security and multiple languages. The EZ-ZONE RUI remote user interface fits in tight spots, its EZ-Key reduces repetitive tasks to one touch and the gateway options connect EZ-ZONE products with other automation equipment and software. Paired with Watlow controllers, these interfaces are the perfect solution for process and machine control applications.
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Sputter Coater & Freeze Fracture Solutions
To obtain high-quality images of samples with scanning (SEM) or transmission electron microscopy (TEM), your samples need to be conductive to avoid charging. If a sample does not have a high enough conductivity, then you can quickly cover it with a conductive layer using the method of sputter coating. Also, a carbon or e-beam evaporator coating can be used. Such coatings protect the sample, allow enhancing of the EM image contrast, or can act as a TEM-grid support film for small scale samples.
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Logger version 2-D electro-magnetic current meter
INFINITY-EM AEM-USB
Infinity EM is an autonomously deployable EM (electro-magnetic) current meter with a data logger. Due to the principle, the instrument provides high accurate 2-D current measurements in even low scatter fields, where ADVs (Acoustic Doppler Velocimeter) has difficulties. The measurement range is wide from 0 to ± 500 cm s-1. The instrument design is compact (1.0kg in air). Infinity EM allows for current velocity measurements virtually anywhere.
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Circuit Synthesis Software
Optenni Lab
Optenni Lab™ is the leading circuit synthesis software for antenna optimization aiming at efficient assessment and optimization of antenna systems at any design phase. Optenni Lab features automatic matching circuit synthesis and optimization, antenna array beamforming with active impedance control, and many supplementary assessment tools. Optenni Lab is often used in conjunction with EM simulators, and several links are provided with major EM tools on the market.
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Handheld 2-D EM current meter with temperature and depth sensor
AEM213-D
AEM213-D electro-magnetic current meter with a display unit can provide the 2-D current speeds in real time. The instrument has a depth and a temperature sensor as well as the current sensor, enabling reliable current measurements at the desired depths. The compact and light-weight unit is easily portable, allowing you to use the instrument in a variety of situations.
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Antenna, Log Periodic
EM-6956 | 500 MHz – 3 GHz
The Electro-Metrics EM-6956 Log Periodic Antenna operates over the .5-3 GHz frequency range. The broadband frequency capacity of the EM- 6956 eliminates the need for band switching, element extension or external tuning.
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Antennas
A specialized transducer that converts electric current into electromagnetic (EM) waves or vice versa.
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General Electromagnetic Model for the Analysis of Complex Systems
GEMACS
Applied Research Associates, Inc.
GEMACS' biggest advantage over other EM codes (NEC, BSC, Carlos-3D, etc.) is the availability of multiple physics and solution methods integrated into a single product, with a command and geometry language that lets the user and not the software direct the execution of a particular problem.
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Horn Antenna
Horn antenna is a partial discharge sensor designed to receive electromagnetic (EM) emissions from a PD occurring in electric assets like GIS and GIL or MV and HV power transformers. It is a broadband antenna with a flat response which makes Horn antenna suitable in a number of different applications. It has been optimized to operate in a frequency range suitable for PD activity monitoring and it was designed to provide maximum sensitivity and high gain.
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Antennas
Is a specialized transducer that converts electric current into electromagnetic (EM) waves or vice versa.
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Handheld 1-D electro-magnetic current meter for rivers
AEM1-DA
AEM1-DA is a 1-D electro-magnetic (EM) current meter for the flow measurements in rivers, streams and various waterways. The measurement range is 0 to 5m s-1. The EM sensor can accurately measure water speeds at a shallow depth of 3cm. The display unit has a 2MB flash memory so that the data are saved with calendar information (up to 255 station data). In comparison with conventional propeller-type current meter, AEM1-DA is robust and extremely easy to be operated and maintained.
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IQ Modulator
IQM Series
*Capable of receiving from DC to 500 MHz, LO inputs, outputting RF frequencies *Internal low noise oscillator *Internal reference *Buffered modulator Balanced IQ *Optimized for low EVM *Internal Reference Detect Switch Optional (EM Research RDS Series) *Up to 250 mega-symbols per second
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CCCP Controller
CCCP is the technology behind Nüvü Camēras’ extraordinary sensitivity in low light imaging. The patented controller generates significantly less clock-induced charges (CIC) than any other CCD controller during charge transfer throughout the EMCCD (down to an average below 0.001 ē/pixel/frame), therefore allowing for greater EM gain to ultimately attain sub-electron readout noise.
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Antenna, Ridged Guide
EM-6960 | 200 MHz – 2 GHz
The EM-6960 operates over the 200 MHz to 2 GHz frequency range and is characterized by relatively high gain and low VSWR over this wide range.
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Antenna, Omni-Directional Wideband Discone
EM-6105 | 10 KHz – 2 GHz
The EM-6105 is a broad band collinear array allowing very wide Omni-Directional frequency coverage in a single package. Below approximately 100 MHz, the EM-6105 acts as an active vertical rod which offers 10 to 12 dB more signal handling capability than competitive antennas (overload field strength: 2 V/meter) which greatly reduces intermodulation generated signals in a typical read world RF environment. In the congested spectrum above 100 MHz the antenna is passive and contributes no intermodulation products so the overload point is determined solely by the receiving instrument. This immunity to overload can often make the difference between useful signal output and an indecipherable jumble of spurious products and is accomplished without compromising sensitivity. The antenna collapses for convenient storage and transport. The EM-6105 is supplied with an EM-6106 Battery Pack.
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Antenna, Pyramidal Horn
EM-6119 | 1.7 GHz – 1.9 GHz
The EM-6119 Pyramidal Horn Antenna is specifically designed for operation in the PCS and DCS bands (1700 MHz to 1900 MHz). Over this frequency range this antenna exhibits a typical gain of 10 dBi, and provides an excellent match with typical VSWR of <1.2:1. This antenna is useful in transmitting as well as receiving signals in this band.
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Antenna, Loop Sensor
EM-6873 | 20 Hz – 100 KHz
The EM-6873 Loop Sensor Antenna uses passive circuits to transform magnetic field components between 20 Hz – 100 kHz to an equivalent open circuit two-terminal voltage on the receiving instrument. Use of the conversion Factor Chart, supplied with each antenna, will yield the strength of the magnetic induction field referenced to a uniform field. The loop is electrostatically shielded and therefore is sensitive only to the magnetic component (B-field) of the electromagnetic fields.
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Antenna, Loop
EM-6871 | 30 Hz – 1 MHz
The EM-6871 Antenna can be used with any 50 ohm /Receiver/Field Strength Meter to obtain magnetic field measurements from 30 Hz to 1 MHz.
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Shielding Effectiveness/ Conductivity Test
EM-2107A | 30 MHz – 1.5 GHz
The EM-2107A is a standard test fixture for evaluation of the electromagnetic shielding effectiveness of planar material. The fixture is an enlarged section of coaxial transmission line and complies fully with the requirements of ASTM test method D4935-1. The measured data relates to the shielding effectiveness due to a plane wave (far field EM wave) from which near field values for magnetic and electric fields may be inferred. The EM-2107A is provided with a reference standard test specimen, a dynamic range specimen. Dynamic range of greater than 80dB is achievable, although the cables and other test system components usually establishes the limiting factors.
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Earth Resistance Meter
EM 4058
earth tester is a digital, microprocessor controlled instrument that allows to measure the earth resistance and ground resistivity (using Wenner´s method), as well as to detect parasitic voltages present in the ground. This instrument is suitable to measure earth systems in power substations, industries, distribution networks, etc., according to IEC 61557-5.
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Antenna, Biconical
EM-6912A | 30 Mhz – 300 MHz
A balun, feedline, and element cage give the Electro-Metrics EM-6912A response curves that are almost linear, making it ideal for swept measurements. An added benefit is that the EM-6912A has an improved BALUN design, which makes it insensitive to changes of orientation while vertically polarized. Readings obtained will be the same no matter which element is closest to the ground plane, eliminating a potential source of measurement error.
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Antenna, Log Periodic
EM-6936 | 700 MHz – 1300 MHz
The Electro-Metrics EM-6936 Log Periodic Antenna operates over the 700 MHz – 1300 MHz frequency range.
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Earth Meter
EM-4055
The EM-4055 Earth Meter is a digital, microprocessor-controlled instrument that allows to measure the earth resistance and ground resistivity (using Wenner´s method), as well as to detect parasitic voltages present in the ground. This instrument is well suitable to measure earth systems in power substations, industries, distribution networks, etc., according to VDE 0413. It is also suitable for soil resistivity measurements, in order to optimize the earth systems project
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Antenna, High Field Biconical
EM-6913 | 20 MHz – 300 MHz
The Electro-Metrics EM-6913 can be used for generating high intensity fields as required for EMC immunity testing 20 MHz to 300 MHz.
