Ohmmeters
measure the electrical resistance of a conductor.
See Also: Micro Ohmmeters, Teraohm Meters, Megohmmeters, Microhmmeters
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Product
Digital Micro Ohmmeters
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Our micro-processor controlled range of units offers the testing capability of up to 600 amps DC with 0.1μΩ resolution. Auto-ranging metering simultaneously displays all three parameters (mV, A, and μΩ).
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Product
Tap Changer Analyzers & Winding Ohmmeters
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Winding resistance test of inductive test objects, such as power transformers, is one of the most effective non-intrusive ways of checking its condition. Due to their advanced design, DV Power winding resistance meters provide high test currents (up to 100 A DC) and high accuracy (up to 0.1%) within light and portable test instruments. In addition to winding resistance measurement, it is also possible to perform simple, quick and reliable transformer on-load tap changer condition assessment by recording the test current during tap changer operation, also known as DVtest. Because of that, problems with a tap changer connection, contacts, and switching procedure can be detected.DV Power winding ohmmeters consist of single-phase RMO-T and three-phase TWA series. Models from the TWA series are designed for six-winding resistance measurement of power and distribution transformers, with only one single-step cable setup. As a result of reducing the total test time, it enables significant saving of time and money.Typical application areas of these instruments are high-voltage substations and industrial environments. They are intended to measure the resistance of:Transformer windingsOn-load tap changersGeneratorsElectrical motorsHigh-current bus bar jointsCable splicesWelding joints
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Product
Micro-Ohmmeters
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Is a top-of-the-range product designed for on-site, workshop or laboratory use.
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Product
Micro-ohmmeters
MMR-650
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Designed to measure very low resistances of both resistive and inductive types of objects, including amorphous core transformers. This product is made to be used in power plants, railways and maintenance companies, to measure welded and soldered connections, equipotential bondings, earthing conductors, contacts, bolted connections, windings of motors and power transformers and other resistive and inductive objects. MMR-650 can be also utilized on a production lines (eg. at the final production control stage). An innovative combination of a high-performance measuring device with a modern user interface and advanced data management system. Wireless data transmission, enhanced system of 2D codes and ability to print labels to identify test items, all contribute to bringing new quality of work and allow the user to perform a wide range of measurements.
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Product
Ohmmeters
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GAOTek provides state of the art, professional grade Ohmmeters for sale to the United States, Canada and Globally. GAOTek Ohmmeters are portable instruments that accurately measure electrical resistance between two points on a circuit. The Ohmmeters have their own power supply through their own battery, and are needed when the two probes (red: positive side of circuit, black: negative side of circuit) are connected to the two points in the circuit where the desired measurement is to take place. The circuit is turned off, which is when the ohmmeter sends its own current through the circuit. Units of Ohms, symbolized by the Greek letter Ω (Omega), are used as a unit of measure when measuring electrical resistance. In accordance with Ohm’s law, when the current is passing through a circuit is at its maximum, the resistance is said to be the smallest.
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Product
Low Resistance Ohmmeters
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Some times know as Ducter testers, these are highly accurate, easy to operate instruments that measure resistance with resolution as fine as 0.1 micro-ohm. Digital micro-ohmeters and DLROs measure contact resistance of switch and circuit breakers, aircraft frame bonds, and rail and pipeline bonds just to name a few of the applications. Megger has models available for testing using test currents from 0.5 mA to 200 amps covering a multitude of applications that require precise low-resistance measurements.
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Digital Micro OHM Meter
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NMC's Digital Micro Ohm Meters are low cost, compact, light weight, 3½ digit resistance meter suitable for measurements of resistances of cables, wires, transformers, motor windings, coils and contact resistance of switches, connectors, relays and track resistance of PCB's etc. The value of resistance is displayed on 7 segment LED display. Four terminal measurement systems provide measurements free from errors due to contact resistance and test lead resistance.
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Product
Precision Micro Ohmmeter
BS407
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High basic accuracy of 0.1%Wide range of 1 µΩ to 20 kΩCurrent reversal switch for detecting thermal EMF effectsCurrent diversion switch for easy zeroingFour terminal measurement using Kelvin clip leads (supplied)Battery operation with built-in charger20mV clamp for "dry circuit" testing
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Product
Micro - Ohmmeter / Milli - Ohmmeter
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Basic Accuracy 0.25%Max. Test Current : 5A (120mV) for 7002Max. Test Current : 10A (60mV) for 7272Manual or Auto RangeFour Terminal Kelvin Measurement6 Ranges with 1mV Best ResolutionMeasurement of Resistive and Inductive MaterialsSetting for HI, LO & PASS ReadingsMemory of 3000 Measurements DataProgrammable HI-LO Alarm with memory of 20 DataLarge LCD with Backlight & HOLD FunctionLow Power ConsumptionBattery Operated with AC AdaptorLow Battery (Voltage) AlarmLED indication for Invalid Resistance MeasurementCable Length Measurement in feet & metersUser Interface Software for PC Communication via RS232C(to USB Bridge) cableBuilt-inBatery Chaging Circuit & Calender Clock
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Product
Motor Winding Ohmmeter
RMO-M Series
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The motor/generator winding resistance test is used to identify open windings, shorts between two windings, short to grounds, connection mistakes or shorted turns. This non-invasive test of winding resistance helps to pinpoint problems regarding windings in stator or rotor part of an electrical machine. Additionally, motor winding ohmmeter has the capability of performing heat run test which will show a change in windings resistance with an increase of temperature.The RMO-M series is designed as an ideal aid in preventive maintenance of electrical motors and generators. They are powerful (up to 100A of test current), portable (8 kg) and generate DC current which is completely ripple-free. This makes measurement very precise with 0,1% accuracy.Three voltage channels make measurement very easy since it is possible to obtain a value of all three winding resistances in one measurement
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Product
100 Ampere Micro OHM Meters
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Introduction: Measuring the line loop contact resistance by bridges is not the ideal method as the test current is only a few milli amperes. Thus the value is not the true value of the contact resistance. Model HL- 100 is a direct reading tester, and uses a test current of 100A DC, resulting in true v alue and accur ate measurements. Model HL- 100 adopts digital circuit technique and is used for measuring contact resistance of switch control equipments at test current of 100A DC. The measurements are accurate as the test is highly stable.HL- 100 is a new, fully automatic micro controlled tester that measures contact resistance at 100A DC with built in printer. The advantages of HL-100
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Product
MICRO OHM-METER
UONT100A
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International Biological Laboratories
This Test Set is capable to measure low resistance like switch contacts, breaker contacts, busbar splices, joints, fuses, low inductive windings etc. by circulating high value of D.C. through the contact/junction and measuring D.C voltage drop (4 terminal method) which, sent to instrument amplifiers , thereby being displayed on resistance meter.
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Product
Micro Ohm Meter 200A
Micro Centurion II
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Raytech Digital Micro ohm meter, Micro-Centurion II, was designed for high degree of accuracy to measure very low resistances. This technology was then packed into a portable test system to be used by apparatus manufacturers, rebuild shops, and electrical maintenance crews. This intelligent system has an easy to use operation screen, which allows quick selection of the current level and resistance level to be measured.
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Product
Battery Impedance Meter
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Operation is fast and simple. Just press the spring-loaded probes onto the two poles of the battery. After 1.5 seconds, the unit beeps (indicating good contact) and displays the battery voltage and either the number of siemens or milliohms, depending on the knob setting. The display continues to show these numbers after the probes are removed; it resets only when the probes are pressed onto the next battery. The impedance and voltage of any battery between 1.2 and 60 volts can be read. Because of the wide range of voltages, even single low-voltage cells, such as NiMH, can be measured. The manufacturers of some batteries specify impedance in milliohms while other specify in siemens (one divided by the resistance in ohms). This meter will display both types of impedance for any given battery. Accuracy is +/- 2% of the value.
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Product
IST(5KV~15KV)High Voltage Micro Ohm Meter,Insulation Resistance Tester Kit
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Chongqing Assen Power Equipment Co., Ltd
ISF High Voltage Ohm Meter has a large LCD screen gray backlit display, data storage, data access, alarm, and automatic shutdown functions.
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Product
Digital kV Meter
VM-10, VM-20 , VM-30
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UDEYRAJ ELECTRICALS PRIVATE LIMITED
High Voltage Meters measure AC and DC voltages of up to 30kV with high accuracy. The meter input impedance is as high as 1000 M ohm, making the meter suitable for measurement of voltages of high source impedance circuits. Meters are compact and light weight and can be conveniently used as a calibration meter.
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Product
Micro Ohm Meter
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Changzhou Applent Instruments Inc.
It has easy operation and tests with high speed. It has high acccuracy, a wide range and high-cost performance. The test ranges from 1μΩ-20MΩ.
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Product
Low Thermal Input Cable
34102A
Digital Cable
Use this 1.2-m shielded, 4-conductor connector only with the 34420A Micro Ohm Meter; terminated in copper spade lugs.
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Product
Micro Ohm Meter
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The meter is used for testing cables under load condition. Available in various specifications and models, it is of great use in power generation sector.
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Product
OHMMETERS
DOT-1000-2
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Model DOT-1000-2, is an ac four-terminal ohmmeter to be used for the measurement of dynamic ac resistance of batteries, fuel cells and other voltage sources.
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Product
Handheld Micro-Ohmmeters
RMO-H Series
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The RMO-H is battery operated and handheld micro-ohmmeter. It is designed for a variety of applications for contact resistance measurement of non-inductive test objects. Typical applications are accurate testing of:medium and high-voltage circuit breakers,disconnecting switches,high-current bus bar joints,cable splices,and different high-current links.Even more, it accurately measures in high-induction filed environments and substations, as well as in factory testing.RMO-H Series contains six models in total, divided in 2 sub-series depending on the test leads length requirement and the battery type:RMO-H1, RMO-H2 and RMO-H3 models are intended for use with short cables (e.g. 1,3 m / 3 m / 5 m). The 1-cell Li-Po battery with 8200 mAh capacity provides output voltage up to 4,1 V DC.RMO-H21, RMO-H22 and RMO-H23 models are ideal for applications where test leads with lengths > 5 m are required. The high output voltage (up to 8,3 V DC) is provided by 2-cells 4100 mAh Li-Po battery.The test current is regulated and can be selected in a range of 1 A to maximum 300 A, depending on the maximum test current rating:RMO-H1, RMO-H21 models – up to 100 A DCRMO-H2, RMO-H22 models – up to 220 A DCRMO-H3, RMO-H23 models – up to 300 A DC.Unlike many other handheld micro-ohmmeters available on the market, our instruments have regulated and user-selectable test currents. Therefore, RMO-H instruments generate an automatically regulated test ramp with stable and ripple-free current during measurement. These revolutionary characteristics in a handheld micro-ohmmeters technology are possible by using sophisticated Li-Po batteries. Consequently, modern battery technology enables you to do multiple measurements, and a full day of testing without recharging the battery.With all RMO-H models, it is possible to make tests on Both Sides Grounded testing objects, in an increased safety environment. Finally, these features in combination with a user-friendly interface (1-click to measure) significantly speed-up testing procedure and make it safer.These instruments store up to 1000 measurements on the internal micro SD card.Our free DV Win software communicates with the RMO-H micro-ohmmeters via a wireless Bluetooth interface. Furthermore, it allows you to download test results, analysis and generate fully configurable test reports.
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Product
Digital Multimeter
MM-2
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Our compact, low cost Model MM-2 Digital Multimeter with True RMS is ideal for general electrical testing and troubleshooting. This full function multimeter measures DC voltage to 1000 V and AC voltage to 750 V, DC and AC current to 10 A and resistance to 400 Ohms. In addition to volts, amps and ohms, this meter includes audible continuity, diode, LED and transistor hFE tests. The rotary switch allows you to select from any of the functions quickly and easily.
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Product
Compliance Voltage Ohmmeter
ΩhmRanger-LCV
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ΩhmRanger-LCV is an accurate, 3.5 Digit, Low Compliance Voltage Ohmmeter. It is able to measure from >100M to 10 Ohms, ΩhmRanger-LCV is suitable for professionals and enthusiasts alike.
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Product
Resistance Measurement
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PROMET 100 / 200 / 600 high-accuracy, precision ohm meters deliver an adjustable test current up to 600 A which is independent of the supply voltage. They utilize the four-wire resistance measurement method, enabling them to meet extremely stringent accuracy requirements when determining resistance values in the micro-ohm range.State-of-the-art power electronics coupled with a robust design guarantee maximum reliability, even when used as portable devices in switching stations or industrial environments.The modern operating concept, an interface to the test systems of the ACTAS product line and an optional remote control unit make these micro-ohm meters flexible and versatile.
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Plant Auditor's Surface Resistance Kit
PMK-153
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The PMK-153 Resistance Test Kit contains the instruments you need to take resistance measurements.The PMK-153 includes the PAS-853B Wide Range Ohmmeter with 5 pound Conductive Rubber Electrodes. The PAS-853B instrument is a wide range ohmmeter that measures accurately from 0.01 to 9.9x1012 ohms. In AUTO mode the instrument automatically adjusts resistance range and selects test voltage in accordance with standard practices outlined in ANSI/ESD STM11.11, and meets audit requirements of ESD TR53.
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Live-Line Micro Ohmmeter
Ohmstik Plus
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The Ohmstik Live-Line Micro Ohmmeter measures the micro-ohm resistance of conductors, connectors, splices and switching devices positioned directly on an energized, high voltage lines. This measurement is much more direct than infrared thermography, and is not subject to emissivity, weather, current loading, background, and other influences that cause infrared errors.
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Product
Low Thermal Input Connector
34104A
Accessory Kit
Design custom input connections on your 34420A Micro Ohm Meter with this mating connector
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Product
Micro OHM Meter
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Cambridge Instruments & Engineering Co.
This Test set is capable to measure low resistance like switch contacts, breaker contacts, busbar slices, joints, fuses, low inductive windings etc.
