Zero Resistance Ammeters
measure galvanic current and resistance. Also known as: ZRA
See Also: Ammeters, Nanoammeters, Picoammeters
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Product
5-Wire Resistive Type Single-Touch Module
ETM-RES04C
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Resistive touch technology, supports 5-wire touchscreen, USB & RS-232 Interface, Resolution support to 2048 x 2048, High Reliability and Fast conversion time.
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Product
Insulation Resistance Tester
250-1000V
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Wuhan Fanke Transformer Manufacture Co., LTD
Professional Insulation Resistance Tester, 250-1000V
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Product
Three-Phase Transformer Winding Resistance Meters
TWA Standard Series
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When it comes to winding resistance measurement on three-phase power transformers and autotransformers, TWA Standard series offers some of the most technically advanced instruments with LCD display in the market. Both models are capable of testing six transformer windings with a one-time cable connection, as well as three-phase automatic transformer demagnetization. The stored magnetic energy is safely automatically discharged at the end of the test. The built-in tap changer control unit enables automated test mode, where the instrument operates the tap changer without operator input and records winding resistance results based on pre-selected stabilization criteria. This option makes the operator’s job significantly easier.Both models can output test currents from 5 mA to 25 A DC for the purpose of winding resistance measurement. TWA40D has a special test mode for checking the synchronization of on-load tap changers with three phases simultaneously tested in parallel, in which the total test current can rise to up to 40 A DC.TWA40D has additional advantages when it comes to non-intrusive tap changer analysis. The unique DVtest method enables checking the moving contacts of on-load tap changers during the transition, measuring the transition time, detecting open circuits, and many other types of faults. It is performed with 0.1 ms sampling rate, simultaneously with the measurement of tap changer motor current which helps with the detection of motor and mechanical issues. A special proprietary algorithm is used for testing tap changers connected through a built-in series (booster) transformer. The DVtest can be performed either on one phase or on three phases simultaneously. It can also be performed as an additional test simultaneously with the winding resistance test in all tap positions.An additional unique advantage of TWA40D is the capability of simultaneously testing the winding resistance of all three phases of a three-phase transformer (connected in a YN configuration). This can significantly shorten the total testing time – for example, it enables the operator to perform 33 measurements instead of 99 on a tap changer with 33 tap positions.The test leads for TWA three-phase transformer winding ohmmeters are interchangeable with the TRT turns ratio testers, which means that both sets of tests can be performed with a single test lead connection to the power transformer terminals.
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Product
DC Air Based Resistance
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DC Air Based Resistance Standards are designed for high accuracy resistance calibration in air.
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Product
Insulation & Earth Resistance Testers
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KV Hipot Power Test Equipment Co.,Ltd
resistance tester is used to measure the resistance of the earth is called Earth Resistance Tester. All the equipment of the system is grounded through the earth electrode. Unhindered earthing protects electrical equipment and personnel from the fault current.
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Product
Field-installation Type Electric Resistivity Meter (Two-Wire Transmission)
HE-300R
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HE-300R connects resistivity sensor (ERF Series) and measures resistivity and temperature in the sample water.It is suitable for measurement of UPW resistivity.
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Product
LoadLooker Ammeter
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Instead of you manipulating a hinged or clamp-type inductive pick-up, the patented LoadLooker electronically closes the loop for you. Its unique U-shape jaw senses the amperage present between its tines.
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Product
Resistance Measurement Meters
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Shanghai Beha Electronics Co., Ltd.
The meter digital milli-ohmmeter is a battery operated instrument wich supply a low current to the circuit under test, with which, stable, accurate measurement of low resistance can be made, still, over a wide range of values.
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Product
Digital Earth Resistance Tester
ERT-1501
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Electronic Digital Earth Resistance Tester is direct replacement of the conventional hand generator type tester. It is designed for measurement of the resistance of earthing used in the electrical equipment as well as for measurement of ground resistivity. It can be used for measurements of the other low regular and liquid resistances. It can also be used for measurement of voltage AC, voltage DC and resistance. This instrument finds wide application for testing earthing installation in power based industries, telecommunication networks and electrical traction systems etc.
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Product
Earth Resistance Clamp Meters
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Precision Mastech Enterprises Co.
Specialized, non-intrusive electrical testing tools designed to measure grounding system resistance without disconnecting the ground rod or using auxiliary electrodes.
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Product
Resistivity Cell For N1413 With B2980 Series (26/50/76 Mm Diameter Electrodes)
N1424C
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The N1424C is designed to operate specifically with the B2985B/87BElectrometer/High Resistance Meter. It is used to measure surface or volume resistance/resistivity of insulation materials. The N1413A High Resistance Meter Fixture Adapter is required to connect the N1424C to the B2985B/87B.
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Product
Insulation Resistance Tester For PV (Judge Deterioration Point)
MIS-PVS
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MULTI MEASURING INSTRUMENTS Co., Ltd.
The model MIS-PVS is an insulation resistance tester for the exclusive use in photovoltaic systems. The ordinary insulation resistance testers cannot make measurement properly during generation of PV systems. This instrument, however, can measure the insulation resistance simply by touching probe to the live line whether making generation or not. There are two ranges of PVH and PVL. PVH is for high voltage generation system (more than 500V and less than 1000V) and PVL is for the system less than 500V.
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Product
Decade Resistance Box
TEK903
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The TEK903 is a very reliable decade resistance box with high quality rotary switches providing in-line readouts. Ideal for laboratory, educational and calibration applications. The extra terminal forms an accurate potential divider.
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Product
Insulation Resistance Tester for PV (2 range)
MIS-PV1
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MULTI MEASURING INSTRUMENTS Co., Ltd.
The model MIS-PV1 is an insulation resistance tester for the exclusive use in photovoltaic systems. The ordinary insulation resistance testers cannot make measurement properly during generation of PV systems. This instrument, however, can measure the insulation resistance simply by touching probe to the live line whether making generation or not. There are two ranges of PVH and PVL. PVH is for high voltage generation system (more than 500V and less than 1000V) and PVL is for the system less than 500V.
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Product
3 Wire (Digital) Earth Resistance Tester
1820 ER
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Standard Electric Works Co., Ltd
● Capable of measuring earth resistance and earth voltage.● 2mA measuring current permits the testing of earth resistance without tripping earth leakage current breakers in the circuit under test.● The test leads are supplied as standard accessories for simplified two-wire measuring system.● Battery operated.● Data hold function.● Low battery indication.● Calibration performed with supplied test leads.
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Product
Surface Resistance Meter
WL MIDGET
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WL MIDGET Surface Resistance Meter is an ultra-wide range, battery operated, portable instrument for measuring Surface Resistivity and Resistance to Ground of virtually any flat surface conforming to ASTM D-257 standard method by using recommended parallel bar sensing probe. Gives simple, repeatable measurements of conductive, static dissipative, and insulative surfaces. Ranging is automatic due to the use of high-speed OP-AMP Integrated circuits being linear, with changeover points +1/2 decade on a logarithmic scale. Repeatability equals + 5%.
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Product
Field-installation Type Electric Resistivity Meter (Four-Wire Transmission)
HE-200R
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HE-200R connects resistivity sensor (ERF Series) and measures resistivity and temperature in the sample water. It is suitable for measurement of UPW resistivity.
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Product
9U Rackmount, 19" SXGA Industrial Monitor With Resistive Touch Control, Direct VGA, And DVI Ports
FPM-3191G
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19" SXGA TFT LCD with LED backlightRobust design with stainless steel chassis and aluminum front panelAnti-glare screen with tempered glass and IP65-certified front panelLockable OSD control pad on rear coverSupports 24 VDC power inputSupports panel, wall, desktop, rack, or VESA arm mountingSupports 9U pre-drilled rackmount mounting holes
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Product
Winding Resistance Tester
JYR20S/10S
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DC winding resistance testing is regarded as another essential routine screening tool. It indicates problems such as loose, defective or incorrect connections, which cause enough transformer failures each year to be regarded as a failure category of its own.
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Product
SparkFun Decade Resistance Box
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This is the SparkFun Decade Resistance Box, an involved PTH soldering kit that allows you to quickly and accurately dial in a specific resistance value between 0 and 999,990 Ω, in 10 Ω increments. The concept is simple, a decade box is a tool that contains resistors of many values that can be accessed via mechanical switches. All you need to do is just adjust the knobs to output any of the discrete resistances offered by the box. Once assembled, each kit will have controls that correspond to the digits in a decimal number - a control for the tens position, a control for the hundreds position, and so on.
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Product
Ammeter According to DIN EN 61010-1 (VDE 0411-1)
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PeakTech Prüf- und Messtechnik GmbH
Is a measuring device for AC and DC currents up to 1000 A using a current clamp for conductor diameters up to 48 mm. Current and voltage measurements are carried out as true RMS (true rms value) measurements, which means that the measured values are displayed correctly even with waveforms that deviate from a sine wave.
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Product
Ammeter
DC Moving Coil Meter
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It uses magnetic deflection, where current passing through a coil placed in the magnetic field of a permanent magnet causes the coil to move.
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Product
Resistivity Meter with Multi Electrode
POLARES
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Till this moment the use of Electrical Resistivity Tomography (ERT) for geology has always been basically the same since its debut, based on the original vertical Electrical Soundings (VES) principles: applying a continuous current to two stakes inserted into the ground and measuring the corresponding voltage between other two. The applied current and thus the relative tension have always been continuous, with an inversion in polarity for each measure. The new tool POLARES uses an alternate current, instead, sinusoidal type, with an adjustable frequency.
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Product
20J3 SHEET RESISTANCE METER
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Non-contact measurement of Ohms/sq, Ohms-cm, resistivity, thickness, and moreMeasures nearly all thin conductive materials or coatingsChoose a sensor in one of four ranges, from .005 Ohms/sq to 100,000 Ohms/sqadd other sensors laterFor benchtop or inline applicationsSimple one-button operationSmall footprint with detached sensor probeOptions include vacuum-ready probe, PC-based productivity software, Ethernet connectivity, stage, and more
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Product
Insulation Resistance Testers < 1 kV
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With over twenty 1-kV models to choose from, selecting the proper Megger insulation tester can appear a bewildering task at first. Actually all the process requires is a little organization. All Megger insulation testers perform essentially the same test in fundamentally the same manner - accurately and reliably. Refinements and added features, however, separate one model from another in application and operator appeal.
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Product
Handheld Turns Ratio & Winding Resistance Tester
TWR-H Series
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Handheld TWR-H device is DV Power single-phase instrument designed for measuring transformer winding resistance and turns ratio.The instrument has two output DC sources for measuring transformer winding resistance. The first DC source can output up to 2 A DC and is used for injecting current to the transformer’s high voltage winding. The second DC source can output up to 10 A DC and is used for testing the transformer’s low voltage winding. This is especially useful when measuring winding resistance of distribution transformers. These transformers have large turns ratio and therefore a big difference between resistances of high voltage and low voltage windings. Upon the winding resistance test, it is also possible to demagnetize the transformer core. The demagnetization process is completely automatic and safe.Together with the turns ratio, the instrument also measures excitation current and phase shift. This enables detecting transformer core or winding turns failures which cannot be spotted by measuring turns ratio only. The instrument can output test voltage up to 40 V AC for this test, but it can also output a very low test voltage of 1 V AC which is necessary for turns ratio verification of the majority of current transformers.TWR-H is powered by an internal Li-Ion battery. Up to 100 tests can be performed with a fully charged battery.
