4-wire
resistance measurement using an ohmmeter's two each, force and sense leads.
See Also: Resistance
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Product
4-Wire Universal Cable/Harness Tester
LX-850
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Shenzhen Lian Xin Technology Co., Ltd.
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·The system adopts the advanced four-wire measurement, and the minimum measurable range is 1mΩ.·The maximum test spot is 256.·640×480 full Chinese/English large color display .·All varieties of linearity and safety tests are available.·Fully programmable continuous test is available.
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Product
4-Wire Resistance Measurement | Continuity & HiPot Cable & Wire Harness Testers
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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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Product
- RS-422/485 DIN Rail Mounted Lightning/Surge Protector
Model 8022NX
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FEATURES: Fast Response; Automatic Recovery; Up To 20 MBPS Data Rate; DIN Rail Mounted; Full Duplex; Triple Stage Protection. The Model 8022NX is a DIN Rail mounted surge suppressor for 4-wire RS-422 or RS-485 circuits used to protect factory data networks, or, any network that wants to avail itself of the DIN Rail packaging concept. The Model 8022NX provides common-mode (line to ground) surge protection and differential mode (line to line) protection for balanced networks. All the inputs, outputs and ground connections are via screw terminals located on the top surface of the device.
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Product
MAX31856 Thermocouple Sensor Arduino Shield
SEN-30007-T
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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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Product
Ethernet-GPIB-USB to Serial Interface
Model 9006
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* 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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Product
Inputs Temperature Data Logger – Pt100
HD32.7
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The instrument HD32.7 is a robust 8 inputs data logger for Pt100 sensor temperature probes. The probes can be Pt100 with SICRAM module, direct 4-wire Pt100 or direct 2-wire Pt1000.
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Product
Ground Testing
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Weshine Electric Manufacturing Co., Ltd
1.Soil resistivity tester supports 2, 3 and 4wire grounding resistance measurement. 2. 4digit large LCD display with white screen backlight, suitable for use in dimly lit places. 3. IP65 protection grade, good waterproof, compact and portable, supports multiple functional tests.
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Product
Fastest Flying Probe Test System for Semiconductor Substrate Interconnect Test
GATS-3200
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* Test individual packages or * Test Multi-image panels with Step&Repeat Function * single flying probe top using very high speed voice coil motor (VCM) technology * 50 - 100 tests per second ... high throughput * Dual Flying Probe Top for testing bump-to-bump nets * flying probe head allows testing of all nets including each power and ground point * 4-wire test capability
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Product
Programmable DC Power Supply
SPD1000X Series
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SPD1000X Programmable Linear DC Power Supply has a 2.8 inch TFT-LCD display, features remote computer control capability, and real time wave display. This single output design is focused on delivering high performance and ease-of-use in a small package. The SPD1168 features a high precision programmable output capable of delivering up to 16 V/8 A,the SPD1305X features a high precision programmable output capable of delivering up to 30 V/5 A and also includes a 4-wire sense function for more accurate voltage sourcing, especially for long leads or high resistance connections. There are additional output short and overload protect functions to assist in production and development applications.
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Product
PXI/PXIe LVDT/RVDT/Resolver Simulator Module, 2-Banks
41-670-003-AABBCC
Simulator
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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Product
PXI Temperature Input Module
Module
PXI Temperature Input Modules offer up to 32 channels of analog temperature measurements. Some models include autozero channels for offset compensation as well as open thermocouple detection to identify disconnected thermocouples, while others support 2-, 3-, or 4-wire resistance temperature detector (RTD) measurements. PXI Temperature Input Modules support both high-speed and high-resolution modes. You can program channel configurations and scale measured data into engineering units.
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Product
Rugged Igniter Tester
4314 KV
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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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Product
Load Cell Amplifier Signal Conditioner with Removeable Terminals
MODEL LCA-RTC
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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.
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Product
3-Slot Data Acquisition Mainframe With GPIB, Three 20-Channel Multiplexer Modules, And BenchVue DAQ Software
DAQ973MBX
Mainframe
The DAQ973MBX Best Multiplexer Bundle offer includes a DAQ973A three-slot data acquisition mainframe, three 20-channel DAQM901A multiplexer modules, and a BV0006B BenchVue DAQ software with a KeysightCare software support subscription. 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 measures thermocouples, RTDs and thermistors, AC / DC volts and current; resistance, frequency / period, diode test, and capacitance36-month node-lock BV0006B BenchVue DAQ software license with KeysightCare software support subscription
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Product
Contact Probe for Solar Panels
TP878.1SS.O
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Contact temperature probe for solar panel. 1/3 DIN 4-wire Pt100 sensor.
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Product
RS232 / RS485 / RS422 / Ethernet Surge Protectors
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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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Product
Soil and Air Temperature Probe
TP32MTT.03.B
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Temperature probe with two 4-wire Pt100 1/3 DIN sensors for measuring the soil and air temperature (± 50 mm).
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Product
PXI/PXIe LVDT/RVDT/Resolver Simulator Module
43-670-XYZ-AABBCC
Simulator
The 41/43-670 range is ideal for the simulation of variable differential transformers (VDT), both linear (LVDT) and rotary (RVDT) types, as well as resolvers. Available with up to four banks, each bank is 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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Product
16-Channel RTD Signal Conditioning Card
ProDAQ 5821
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The ProDAQ 5821 series of Signal Conditioning Cards is designed to interface with a variety of sensors, principally RTDs, Thermistors, Cryogenic Diodes and Voltage type sensors. Each version of the 5821 provides the capability of precise 4-wire measurement. In order to achieve this, a precise 500μA constant current source is provided per channel. The current source can be disabled on a per channel basis and is monitored to ensure that current is flowing. The value of the output current is stored on-board after calibration. In order to achieve the highest accuracy the output current may be automatically calibrated 'on-the-fly' using the ProDAQ 3416 24-bit Sigma-Delta ADC card and an on-board precision resistor.
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Product
SparkFun Triple Axis Accelerometer Breakout
ADXL345
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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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Product
MAX31855 K-Type Thermocouple Arduino Shield
SEN-30004-K03
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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 MAX31855K supports a measured temperature range of -270C-1372C 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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Product
Process Analyzers
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Knick Elektronische Messgeräte GmbH & Co. KG.
Industrial meters for pH, ORP, conductivity and oxygen. In 2- and 4-wire technology, explosion-proof.Bus Communication: HART, FOUNDATION Fieldbus, Profibus DP and PA. Robust industrial housing with high IP protection. Suitable for outdoor use. For analog and digital sensors. Simple intuitive operation. From DIN rail transmitters up to the modular system.
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Product
PXI Dual 12x8 Matrix, 2 Pole Switching
40-522-022
Matrix Switch Module
Medium density PXI dual 12x8, 2-pole matrix - it is also available in reed relay formats of 2-pole and 1-pole screened (see "also in this range" on right). The screened version is suitable for switching 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 common signals from multiple PXI Modules.
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Product
PXI-2530B, 128-Channel, 1-, 2-, or 4-Wire PXI Multiplexer Switch Module
778572-30
Multiplexer Module
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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Product
ANSI X3.28 to Modbus RTU Converter
Model 2399
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* Converts ANSI X3.28 commandslinto Modbus RTU packets.* New 32 Address Mode supports multi-channel Modbus Controllers like the Watlow MLS300.* Control Modbus RTU devices from any ASCII serial source.* Serial ports support RS-232 and 2-wire/4-wire RS-485 signals.* Includes serial baud rate conversion.* Internal logic is IEEE-488.2 compatible and uses SCPI commands for configurtion setup.* 2399 mounts on a DIN rail or on any flat panel.* Inexpensive way to maintain manufacturing equipment such as semiconductor fusion chambers, etc as the ANSI Controllers become obsolete.* Application Note AB23-3 describes how to use the 2399 to replace obsolete Watlow Controllers in the Axcelis/Fusion Gemini Asher.* 2399 Serial Keyboard Program lets you control and setup the 2399 and test the ANSI modes.* 239x Table Loader Program uploads ANSI Command Table entries from an Excel csv file.
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Product
MAX31855 J-Type Thermocouple Arduino Shield
SEN-30004-J47
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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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Product
PXI Digital Multimeter, 6 digit, Enhanced Performance
M9183A
Digital Multimeter
The Keysight M9183A is a 6 digit PXI digital multimeter that measures common parameters such as DCV, DCI, ACV, ACI, 2- and 4-wire resistance, frequency, capacitance, and temperature. It offers40 ppm basic DCV measurement accuracy, excellent noise rejection, and handles inputs of up to 300 V.
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Product
RTD Measurement for PCI
PCI390
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The PCI390 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. Sensor-data is available in °C, °F, K and Ohms. All inputs are optically isolated from the system.
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Product
PXIe-4140, 4-Channel Source Measure Unit
781742-01
Source Measure Unit
The PXIe-4140 is a 4-channel source measure unit (SMU) ideal for high-pin-count applications. It features 4-quadrant operation, and each channel has integrated remote (4-wire) sensing for accurate measurements. The fast sample rate of the PXIe-4140 can reduce measurement times, capture transient device characteristics, and allow quick I V characterization of devices under test (DUTs). With a high-speed sequencing engine, you can synchronize all these SMUs with each other or with other instruments such as switches or high-speed digital test modules.
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Product
Universal Transmitter
Model LXT-380
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Teledyne Analytical Instruments
The Model LXT380 transmitter is a single or dual channel, intelligent, multi-parameter designed for the online continuous measurement of pH, ORP, Specific Ion (pION), dissolved oxygen, free chlorine, total chlorine, conductivity and resistivity. The Model LXT380 Tramsitter digitally communicates with the SP3X digital sensor, automatically configuring the trasmitter's menues and display screens to the measured parameter. The LXT380 tramsitter can be Loop powered or 4-wired DC powered. The standard configuration has a 4-20 mA and a serial communication port with MODBUS RTU output. Alarm relays option is only available on 4-wired DC powered transmitters. LXT380 Transmitter loop is available in FM, ATEX and IECEx certifications.
