4-wire
resistance measurement using an ohmmeter's two each, force and sense leads.
See Also: Resistance
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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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4-Wire Universal Cable Tester
LX-860
Shenzhen Lian Xin Technology Co., Ltd.
The system provides Chinese/English free switch operation interface·Starting up conducts self-diagnosis and self-correction·The system can scan and direct automatically.·The system provides advanced instant open-circuit, short-circuit, continuity test, can test the wire break·It can function as unilateral, standard, multi-segment and spot test of wire·The maximum test voltage is AC1000V / DC1500V
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4 Wire Earth Resistance & Resistivity Tester
4236 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.● Optical USB to RS-232 data transmission.● The stored data can be transferred to a PC.● 2 optical LEDs are built-in for data transfer.
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4 Wire Earth Resistance Testers
4234 ER
Standard Electric Works Co., Ltd
● Microprocessor-controlled.● Earth testing at 2Ω, 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.● Robust, compact and easy-to-carry.
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4 Wire Earth Resistance Testers
2734 ER
Standard Electric Works Co., Ltd
● Microprocessor-controlled with advanced safety features.● 4-wire testing only.● Automatic C spike check.● Auto power-off.● Auto data hold.● Large LCD (2000 counts).● Protective terminal cover.
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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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CableEye 4-Wire Calibration Verification Board | Cable & Harness Testers
CB52
The CB52 is intended for periodic calibration verification of the Kelvin 4-wire resistance measurement module – an optional, add-on module that may be purchased with any new hipot system, or added to an existing high voltage tester as an upgrade.
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PXI-2530B, 128-Channel, 1-, 2-, or 4-Wire PXI Multiplexer Switch Module
778572-30
128-Channel, 1-, 2-, or 4-Wire PXI Multiplexer Switch Module—The PXI‑2530B is a high-density, multiconfiguration reed-relay switch. With four multiplexer and three matrix configurations, the PXI‑2530B is an excellent solution for complex or high‑channel‑count systems. Multiplexer configurations include 128x1 (1‑wire), 64x1 (2‑wire), 32x1 (4‑wire), or eight banks of 16x1 (1‑wire). Matrix configurations include 4x32 (1‑wire), 8x16 (1‑wire), or 4x16 (2‑wire). You can implement these configurations by selecting the appropriate terminal block.
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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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Water Conductivity Transmitters
ABB conductivity analyzers are designed to meet the most exacting requirements of our valued customers. The extensive range covers 2 and 4-wire analyzers and single or dual-input devices.
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4-Wire Universal Cable/Harness Tester
LX-760+
Shenzhen Lian Xin Technology Co., Ltd.
The system provides English/Chinese free switch operation interface·4-Wire Measurement
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Dual Channel Multi-Band FM Tracking/Data Receiver In Modular Style Housing
LS-27-B
The Lumistar LS-27-B Modular Dual Channel Tri-Band Tracking and Data Receiver is Lumistar’s third generation of modular high performance FM Receivers. This wideband designs supports one or two independent channels of PCM with data rates up to 20Mbps. The unit includes both an optional FM demodulated output for PCM data, and standard programmable AM/linear AGC outputs for auto-tracking receivers. The design offers 8 IF Bandwidths and 8 Video Filters per channel for each receiver.AC coupling with a low pass filter is employed to ensure a high quality data link with long strings of NRZ-L ones or zeroes. The unit provides a software selectable 10 MHz reference I/O port forlocking local oscillators to a high precision external source or to arrange multiple units in a master/slave arrangement. The receiver’s control and status is achieved via Ethernet, USB or auto-switched RS-232 (or “4-wire” RS-485 in place of 232). When utilizing the RS-422 interface, multi-drop configurations can be accommodated.
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SparkFun Triple Axis Accelerometer Breakout
ADXL345
This new version adds two standoff holes as well as an extra decoupling capacitor. The ADXL345 is a small, thin, low power, 3-axis MEMS accelerometer with high resolution (13-bit) measurement at up to +-16 g. Digital output data is formatted as 16-bit twos complement and is accessible through either a SPI (3- or 4-wire) or I2C digital interface.
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Resistive Touch Controllers
Analog Devices offers a range of controller ICs for use with 4-wire resistive touch screens. These controllers can be used in human machine interface applications in consumer, automotive, and other products. Analog Devices’ controllers have 12 bits of resolution, SPI/I2C interface options, and low power consumption, making them ideal for use in handheld devices.
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RS232 / RS485 / RS422 / Ethernet Surge Protectors
Our passive, rugged, industrial-grade RS232 / RS485 / RS422 / Ethernet surge protectors are designed for direct industrial DIN-rail mounting and they come with two (2) or three (3) stages of surge protection — Gas Discharge Tube (GDT), protection resistors, and Transient Voltage Suppressor (TVS) - for maximum protection. From 2-wire RS485, 4-wire RS422 / RS485, to 10 / 100 / 1000M Ethernet, CommFront's surge protectors safeguard your data lines and provide you with a peace of mind.
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Dual MAX31865 PT-100 RTD to Digital Breakout
SEN-30202-PT100
Dual channel breakout board for the MAX31865 RTD-to-Digital converter from Maxim. Two breakout hardware configurations are available standard, designed to interface with either the PT100 or PT1000 platinum RTDs. For non-standard applications, including thermistors, custom hardware configurations can be accommodated. Contact Technical Support for more information. RTD devices may be wired in 2, 3 or 4-wire configurations using the 4-pin screw terminal input. The MAX31865 breakout 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.
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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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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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RS232 / RS485 / RS422 Isolators/ Isolated Converters
From 3-wire to 7-wire RS232 isolators, 2-wire RS485 to 4-wire RS422 / RS485 isolators, and USB isolators to USB / RS232 / RS485 / RS422 optically-isolated converters, CommFront has all the industrial-grade optical-isolation devices to protect your assets from the unexpected. If off-the-shelf product does not provide enough security for you, we can even tailor-make the devices, which are customizable right down to the nuts and bolts.
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Signal Conditioners
Process transmitters isolate, filter amplify, and convert sensor signals to 4-20mA current or 0-10V voltage signals for interfacing with controllers and other instrumentation. Select from 2-wire loop-powered 4-20mA transmitters, 3-wire DC-powered transmitters, or 4-wire AC/DC-powered transmitters. 3-wire and 4-wire models are available as 4-20mA transmitters or voltage transmitters. DIN-rail and field-mount version are available. Configuration is easy with Windows software, push-buttons, switches, or pots for span/zero settings depending on the series.
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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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PXI/PXIe LVDT/RVDT/Resolver Simulator Module, 4-Banks
41-670-001-AABBCC
The 41/43-670-001 is ideal for the simulation of variable differential transformers (VDT), both linear (LVDT) and rotary (RVDT) types, as well as resolvers. It has four 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 4 channels of 5 or 6-wire or 8 channels of 4-wire.
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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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PXI Digital Multimeter, 6 digit, High Performance
M9182A
The Keysight M9182A is a 6digit PXI digital multimeter that measures common parameters such as DCV, DCI, ACV, ACI, 2- and 4-wire resistance, frequency, capacitance, and temperature. It offers 40 ppm basic DCV measurement accuracy, excellent noise rejection, and handles inputs of up to 300 V. The M9182A offers advanced triggering capabilities, including pre and post triggering.
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3-Slot Data Acquisition Mainframe With GPIB And Three 20-Channel Multiplexer Modules
DAQ973MB
The DAQ973MB Better Multiplexer Bundle offer includes a DAQ973A three-slot data acquisition mainframe and three 20-channel DAQM901A multiplexer modules. 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 junctionbuilt-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-2503 , 48‐Channel, 1-, 2-, or 4-Wire, Electromechanical PXI Multiplexer Switch Module
777697-01
48‐Channel, 1-, 2-, or 4-Wire, Electromechanical PXI Multiplexer Switch Module—The PXI‑2503 is a PXI switch module that you can configure as a multiplexer or matrix switch by using different terminal block accessories. It uses electromechanical relays with low thermal offset for accurate measurements and offers a 1,024‐step scan list for deterministic scanning.
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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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MAX31855 J-Type Thermocouple Arduino Shield
SEN-30004-J03
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. The MAX31855J supports a measured temperature range of -210C-1200C 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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MAX31856 Thermocouple Sensor Arduino Shield
SEN-30007-ST
Quad channel thermocouple Arduino shield based on the MAX31856 universal digital thermocouple interface IC. This is an exciting update of the MAX31855, with improvements in resolution (19 vs 14 bits), on-board temperature reference (6 vs 4 bits), and compensation (fully compensated vs nonlinear correction required). The MAX31856 is interfaced via 4-wire SPI with options for interrupt triggering. An LDO and a high-speed level shifter are included on ALL device pins to allow interfacing with to any Arduino - both 3.3V and 5.0V variants - without sacrificing device performance in any operating condition.
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Load Cell Amplifier Signal Conditioner with Removeable Terminals
MODEL LCA-RTC
The LCA-RTC Module provide low-cost, dedicated signal conditioning for a single bridge type load cell or torque sensor. Model LCA-RTC comes with removable screw-clamp terminal connectors, which accept wires without soldering.On- board jumper selections include sensitivities from 0.5 mV/V to 10 mV/V, bandwidths from 100 Hz to 30 kHz, and amplified outputs of 0 to ±5V, 0 to ±10V, 0-16 mA, 0-20 mA or 4-20 mA. Zero and span adjustments are via precision 25-turn low-tempco metal film potentiometers.The units can be operated next to the sensor with 4-wire hookup or at distances up to 1 km (3300 feet) with 6-wire hookup. An onboard 87.325 kΩ resistor allows easy shunt calibration at the push of a button. Provision is also made for a user-furnished calibration resistor. Power requirements are 11.8 to 26V DC with load currents from 10 to 60 mA, the latter applying when the unit provides 10V DC excitation to a 350 ohm load cell and delivers a 20 mA analog output.
