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4-wire
resistance measurement using an ohmmeter's two each, force and sense leads.
See Also: Resistance
- Pickering Interfaces Inc.
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PXI/PXIe LVDT/RVDT Simulator Module, 2-Banks
43-670-103-AABBCC
The 41/43-670-103 is ideal for the simulation of variable differential transformers (VDT), both linear (LVDT) and rotary (RVDT) types. It has two banks, each capable of simulating the output of a single 5 or 6-wire VDT or resolver, or dual 4-wire utilizing a shared excitation signal.
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4-Wire Resistance Measurement | Continuity & HiPot Cable & Wire Harness Testers
An add-on option for the CableEye HVX high voltage cable tester series that permits expanded testing for contact and wire resistance as low as 1 mΩ. After checking for opens, shorts, miswires, and resistance limits, the 4-wire Kelvin measurement applies a user-selectable test current from 10 mA to 1 A to determine connection resistance within 1 mΩ. The resistance profile of a model cable may be stored and used as a basis of comparison during later testing to reveal cold solder joints, faulty crimps, recessed pins, pin contact contamination, improper wire gauge, and stress-extruded wire.This option may be purchased with any new HVX tester, or added as an upgrade to any of your existing HVX testers.
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16-Channel VME Current Source & Analog Measurement Module
V460
The V460 is a VME-based versatile source/measurement unit. It includes a programmable constant-current source, a precision programmable gain 16-bit analog-to-digital converter, and a 4-wire, 16-channel analog multiplexer. An internal microprocessor supervises channel scanning according to user loaded parameters, reporting sensor voltage drops or, for selected sensor types, engineering-unit data.
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REM-11152, 16-Channel (Input), 24 V, 2-, 3-, 4-Wire Digital Module for Remote I/O
784743-01
The REM‑11152 is a digital input module for remote I/O. Remote I/O systems are low-cost, modular systems for simple machine control and measurements. A remote I/O system consists of an EtherCAT bus coupler and individual modules mounted on a DIN rail. You control the REM‑11152 from a real-time controller, such as a CompactRIO Controller or an Industrial Controller. You can use remote I/O hardware to add low-cost I/O for simple tasks while your controller handles advanced tasks such as image processing, motion control, and high-speed or specialty measurements. The REM‑11152 features 2‑, 3‑, and 4‑wire spring terminal connection methods, a built-in power supply for sensors, and an adjustable filter time to improve measurement quality. You can use inputs as counters or standard digital inputs.
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Digital Micro Ohm Meters
Is used to measure DC low resistance through 4-wire method. Its features are: Comparison function to determine if the device is in good condition, unkown wire length calculation (FT/M); two-way data transmission by USB interface.
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Voltage Input Module For Remote I/O
The Voltage Input Module for Remote I/O features 2-, 3-, and 4-wire spring terminal connection methods, a built-in power supply for sensors, four selectable input ranges, and simultaneous sampling. A remote I/O system consists of an EtherCAT bus coupler and individual modules mounted on a DIN rail. You control the Voltage Input Module for Remote I/O from a real-time controller, such as a CompactRIO Controller or an Industrial Controller. You can use remote I/O hardware to add low-cost I/O for simple tasks while your controller handles advanced tasks such as image processing, motion control, and high-speed or specialty measurements.
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RTD Measurement for CompactPCI
CPCI390
The CPCI390 has a 3U form factor and features six 2-, 3-, or 4-wire high-accuracy RTD measurement channels. Each channel has programmable alarm limits on which an interrupt can be issued. The local DSP (TMS320C203) performs linearization, auto-calibration and alarm limit checking. Sensordata is available in °C, °F, K and Ohm. All inputs are optically isolated from the system.
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Value-added Module With 4 Terminal Block 4-wire Isolated RS-232/422/485
VAM100
*4 4-wire Isolated RS-232/422/485*Swappable modular design*Maximize I/O flexibility*2kV isolated protection*Designed for tBOX300/500 series*LVD, FCC, EN 50155 and IEC 60945 certified; CE compliant
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Digital Multimeter
HMC8012
True RMS measurement, AC, AC + DC Simultaneous display of three measurement functions, e.g. DC + AC + statistics Measurement functions: DCV, DCI, ACV, ACI, frequency, resistance (2- and 4-wire), temperature, capacitance, diode and continuity test Mathematic functions: limit testing, minimum, maximum, average, offset, DC power, calculation of dB and dBm Data logging to internal memory or USB stick
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Cable and Harness Tester
CHT
The Cable and Harness Tester (CHT) provides multiple testing capabilities for up to 300 connector/harness test points. Test capabilities include DC Insulation Resistance (IR), DC and AC Dielectric Withstanding Voltage (DWV), and 2-Wire and 4-Wire Continuity.
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MAX31855 J-Type Thermocouple Sensor Breakout
SEN-30003-J
Breakout board for the MAX31855J digital thermocouple interface ICs by Maxim. Measured temperature range is -210C-1200C with known thermal characteristics and output resolution of 0.25C. This sensor supports a larger operating range (specifically in the negative range) than its predecessors, the MAX6674 and MAX6675, though it is not pin-pin compatible. This board is interfaced with a 0.1" 2x5 pin header (8-pins used), has four vertical mini thermocouple connectors and four mounting holes for standoffs and 4-40 screws. The SEN-30003 is interfaced via 3 or 4-wire SPI with a data-ready output for specific operating modes. An LDO and a high-speed level shifter are included to allow interfacing with microcontroller devices between 3.0V and 5V (all Arduinos, Raspberry PI, etc) without sacrificing device performance (many other level shifters reduce data rates to below 500 kHz).
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Modbus Register Converter
Model 2390
* Converts Modbus Registers and variables for replacement Modbus devices.* Maintain existing software when upgrading Modbus systems.* Provides serial control of Modbus RTU devices from any ASCII source.* User defined Register Conversion Table supports all Modbus RTU devices.* Internal Register Conversion Tables for Watlow F4-to-EZ-ZONE and F4-to-F4T conversion.* Serial ports support RS-232 and 2-wire/4-wire RS-485 signals.* Includes baud rate conversion capability.* Uses SCPI commands to load the Conversion Table and set serial settings.* Small metal case mounts on a DIN rail or on any flat panel.* 239x Table Loader Program uploads the 2390 Register Conversion Table from an Excel csv file.* 239x Serial Keyboard Program provides instant control of the 2390 and Modbus Slave Devices without writing a program.
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Ohmmeters
Ohmmeters by Tegam including milli-ohmmeters, microohmmeters, megohmmeters, 4-wire probes, and microohmmeters
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TB-2630B , Screw Terminal, Ribbon, PXI Module Multiplexer Terminal Block
781687-01
The TB-2630B provides the necessary routing to configure the PXI-2630B PXI Multiplexer Switch Module as a single, dual, or quad 1-, 2, or 4-wire multiplexer. You can directly connect the TB-2630B to the front panel I/O connectors of the PXI-2630B. The NI TB-2630B features ribbon cable headers to connect signals to the PXI Multiplexer Switch Module as well as screw terminals for trigger input and trigger output signals.
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3-Slot Data Acquisition Mainframe With GPIB, Two 20-Channel Switch Modules, And One 20-Channel Multiplexer Module
DAQ973SB
The DAQ973SB Better Multiplexer Bundle offer includes a DAQ973A three-slot data acquisition mainframe, two 20-channel DAQM903A Actuator / GP switch modules, and one 20-channel DAQM901A multiplexer module. This bundle provides the following:3-slot mainframe with USB, LAN, and GPIB6.5-digit (22-bit) internal DMM60 channels of multiplexer switches6 channels of dedicated current measurements2- and 4-wire scanning300 V switching80 channels/s scanningbuilt-in thermocouple reference junction20-channel actuator / general-purpose switch with independent single-pole, double-throw (SPDT) relaysbuilt-in signal conditioning to measure thermocouples, RTDs and thermistors, AC / DC volts and current; resistance, frequency / period, diode test, and capacitance
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PXI Dual 12x8 Matrix, 1 Pole Switching
40-522-021
Medium density PXI dual 12x8, 1-pole matrix - it is also available inreed relayformats of 2-pole and 1-pole screened (see "also in this range" on right). The screened version is suitable forswitching signals up to 50MHz. Typical applications include signal routing in ATE and data acquisition systems.The two banks may be used for operating a 4-wire measurement system (bank-1 for source,bank-2 for measure). Larger matrices may be constructed by daisy chaining the commonsignals from multiple PXI Modules.
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VXI High Precision Digital Multimeter
VX2120
The VX2120 is a high precision Digital Multimeter (DMM) for high performance measurements with 24Bit resolution. It provides measurements DCV up to 1,000VDC, ACV up to 1,000VACPeak and resistance (2 or 4-wire) up to 10MΩ. The internal microprocessor is equipped with flash memory for an fast and easy software update via the VXI-Bus. This will simplify new measurement functions to be downloaded. The VX2120 does support both True-RMS and Average-Peak AC-Measurements. For high precision AC measurements the VX2120 uses the "tracking technology". This feature allows high accurate AC measurements even at very low signal frequencies.
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Digital Milliohm Meter
4538 mO
Standard Electric Works Co., Ltd
● 4-Wire method for mΩ measurement.● Measures down to 100µΩ (0.1mΩ).● Maximum resolution of 100µΩ.● 4 Lines × 20 Characters large LCD.● 200 measurement results can be saved in the memory and recalled on the display. ● Auto power off.● Data hold function.● MAX/MIN function.● Power source: 1.5V "C" battery × 8● Long battery life and stable power. ● Low battery indication.
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Ethernet-GPIB-USB to Serial Interface
Model 9006
* All interfaces provide full communication with the serial device.* Ethernet port supports VXI-11 and raw socket protocols.* Controllable with Windows PC programs like C, Visual Basic, LabVIEW, VEE, etc that make VISA or SICL calls.* Controllable from MAC/UNIX/LINUX and similar computers with RPC calls.* GPIB port is IEEE-488.2 compatible.* USB port uses Microsoft supplied driver to prevent driver problems with operating system change problems.* Serial port provides RS-232 and 2 or 4-wire RS-485 signals.* Supports devices that generate asynchronous messages, devices that respond when queried and smart devices.* Internal webserver for easy configuration from any browser.* Board runs on 5 to 15 Vdc power.* Includes ICS's VXI-11 and VISA keyboard control programs.* Works with Agilent, NI and Kikisui VISA libraries.
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4 Wire Earth Resistance & Resistivity Tester
4235 ER
Standard Electric Works Co., Ltd
● Microprocessor-controlled.● Earth resistivity (ρ) test.● Earth testing at 20Ω, 200Ω, 2kΩ.● Earth voltage measuring : 0-300V AC.● Automatic C spike check.● Automatic P spike check.● 2-Wire test, 3-Wire test, 4-Wire test.● LCM display.● Auto ranging.● Auto power OFF.● Data hold.● 200 measurement results can be saved in the memory and recalled on the display.● Interval between auxiliary earth spikes is 1.0~50.0m.
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Single-functional testers
3123
The MI 3123 SMARTEC Earth / Clamp is an earth resistance tester with the ability to perform 4-wire earth resistance measurement and 4-wire specific earth resistance measurement. With the optional A 1018 and A 1019 current clamps the instrument can perform 4-wire earth resistance measurement with one current clamp, contactless earth resistance testing with two clamps and TRMS current measurement up to 20 A. Configurable limits enable a PASS / FAIL evaluation of test results.
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Rugged Igniter Tester
4314 KV
Model 4314 KV is a 4-wire ohmmeter designed to use low test currents for its measurement. Additional circuitry proprietary to Valhalla Scientific is used to ensure that test current levels do not exceed the specified “fail-safe current” even in a worst-case component failure situation.
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LVDT/RVDT Simulation Board
75DL1
The 75DL1 is a cPCI LVDT/RVDT Simulation Board that provides eight 2-wire or four 4-wire transformer isolated programmable outputs. It provides wrap-around self-test, PXI compatibility, optional Excitation Supply, and is available for Military or Commercial applications.
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Battery Testers
Shanghai Beha Electronics Co., Ltd.
*can measure the resistance of rechargeable batteries and DC voltage.*can also test Ni-cd, Ni-MH, Li-ion batteries.*DC Voltage measurement.*4-wire resistance measurement.
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Cable Length Meter
KT-96CR
Range: 60m / 600m / 6km / 60km(197ft-197,000 ft)Resistance: 600mΩ -- 600ΩAccuracy: ±1.5% reading ±3 digits;Resolution:RES Mode 0.01mΩ Cap Mode 0.01mwire guage: 0~26 (ga).material:Al /CuAuto range;Backlight controlResistance & Capacitance measurementSelf- calibrating function;Use a standard cable or a known length cable to calibrate;Auto save the parameter of the cable;Applicable for any type and any size of cable;Transform resistance of wire and capacitance between two wires to length;4-wire vector measurement, high accuracy and resolution.Unit: m / km; ft
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Multi Function Coil Tester
This device tests all ECU control, electronic control, or conventional distributor type ignition coils. The Tester comes with a range of connection cables with terminals to suit the majority of 2-wires, 3-wires, or 4-wires Ignition Coil of various car makes. The Ignition Coil Test is designed to detect the faults in the ignition system and whether there is any occurrence of misfire in a sluggish engine.
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Slip Ring Test System
This is a high specification tester that will measure many cable parameters. It measures cable resistance very accurately using the Kelvin 4-wire method. It also tests for shorts between pins at a low voltage. The next test is to measure insulation between connections at a higher voltage. This is carried out at up to 1500 Volts DC with resistances of 10 to 500 Meg ohms.
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PXI/PXIe LVDT/RVDT/Resolver Simulator Module, 2-Banks
41-670-003-AABBCC
The 41/43-670-003 is ideal for the simulation of variable differential transformers (VDT), both linear (LVDT) and rotary (RVDT) types, as well as resolvers. It has two banks, each capable of simulating the output of a single 5 or 6-wire VDT or resolver, or dual 4-wire utilizing a shared excitation signal. This allows the module to simulate up to 2 channels of 5 or 6-wire or 4 channels of 4-wire.
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Value-added Module With COM/CAN/DIO And 3 PCI Express Mini Card Slots
VAM900
*1 4-wire isolated RS-232/422/485, 1 isolated CANBus 2.0A/B, 1 isolated DIO 8-in/8-out*Swappable modular design*Maximize I/O flexibility*2kV (COM & CANBus)/1.5 kV (DIO) isolated protection*Designed for tBOX300/500 series*EN 50155 certified; CE, LVD and FCC compliant
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MAX31855 T-Type Thermocouple Arduino Shield
SEN-30004-T03
Four channel MAX31855 digital thermocouple Arduino Shield. Two versions of this shield are avaliable for each thermocouple type: either 'Ch 0-3' (CS pins use Uno/Mega IO pins 7-10) or 'Ch 4-7' (CS pins use Uno/Mega IO pins 3-6), with the only difference being which set of zero-ohm resistors are populated on the board. This allows use of other SPI devices that may be 'hard coded' to specific digital pins on the Arduino, or simply stacking one of each type together to get a total of eight thermocouple channels on one Arduino.Each order comes with one board and a set of four female, long extension, headers that can be soldered to the board. If stacking two of these modules on top of each other, please order both a Ch 0-3 and a Ch 4-7 board, as well as an additional set of headers for stacking. We're working on sourcing even longer headers, but the ones currently available are not long enough to stack as-is (they need to be double-stacked).The MAX31855T supports a measured temperature range of -270C-400C with known thermal characteristics and output resolution of 0.25C. Included thermocouple connectors are type-specific to provide proper material continuity as close to the IC as possible. The SEN-30004 is interfaced via 3 or 4-wire SPI and a high-speed level shifter is included to allow the board to plug directly into an Arduino Uno or MegaNote: we also offer a universal version of this board in a smaller for factor, the SEN-30003-T.FeaturesType-specific, miniature-sized vertical thermocouple connectors (vertical flat blades, see pics)Measures four (4) thermocouple channels, full extended range.Boards are stackable. Up to 8 thermocouple channels may be connected to an Arduino.14-bit SPI interfacePlugs directly into an Arduino Uno or Mega form factor with built-in voltage level translation on-board.Standard Arduino female headers required for easy configuration, one set included with order (1-6x1, 2-8x1, 1-10x1 0.1" female stackable headers), not soldered on.Detects shorts to GND or VccDetects open thermocoupleOther versions available (K, J, and T stocked). Contact Customer Service to place a custom order.Mounting holes for 4-40 sized screwsConnections are spaced for 0.1" pin headerDesigned, manufactured, tested and shipped from the USA The MAX31855T supports a measured temperature range of -270C-400C with known thermal characteristics and output resolution of 0.25C. Included thermocouple connectors are type-specific to provide proper material continuity as close to the IC as possible. The SEN-30004 is interfaced via 3 or 4-wire SPI and a high-speed level shifter is included to allow the board to plug directly into an Arduino Uno or Mega
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Micro-Ohmmeter
3207
The Ballantine 4 Digit Micro-ohm Meter 3207 measures Low Resistance in Milli and micro-ohms with precise accuracy. It employs the proven 4-wire measurement technique and eliminates the lead resistance inherent in 2-wire technique to give accurate readings.
