Four-wire
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Product
Field-Installation Type ORP Meter (Four-Wire Transmission)
HO-200
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HO-200 connects ORP sensor and measures ORP and temperature in the sample water. It is suitable for neutralization reaction treatment management of aeration tank, denitrification tank, etc.
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Product
Octal Four-wire Multiplexer
SIM925
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Stanford Research Systems, Inc.
The SIM925 is an eight input channel, four-wire multiplexer for low-level signal applications. Kelvin-lead measurements are supported with optional buffering of the two sense leads
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Product
Field-installation Type Residual Chlorine Meter (Four-Wire Transmission, Water flow beads)
HR-200
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HR-200 is connected to a residual chlorine sensor (RA-20), which allows the free residual chlorine concentration to be measured with high accuracy. It is sutable for waterworks, pool water sterilization, and desalination systems. The measurement method is a three-pole polarographic method, which enables continuous monitoring of residual chlorine concentrations without using reagents. Stable measurement over a long period was realized by physical polishing cleaning using beads.
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Product
Field-installation Type Turbidity Meter (Four-Wire Transmission, For Wide Range)
HU-200TB-W
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HU-200TB-W is a turbidity meter developed to continuously measure turbidity in processes with large turbidity changes, such as water intake and sedimentation tanks in water supply plants. It employs transmission 90-degree scattered light method and is ideal for monitoring changes in processes with large turbidity changes from low range (10 degrees) to high range (2000 degrees). An electric wiper cleaning can be installed as an option, and long-term stable measurement is possible by periodic cleaning.
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Product
Field-installation Type Dissolved Oxygen Meter (Four-Wire Transmission, Membrane Type)
HD-200
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HD-200 connects the DO (Dissolved Oxygen) sensor (DO-1100) and measures the DO in the sample water.The measurement method is membrane type polarography method. It is suitable for monitoring DO in wastewater treatment or aquarium for aquaculture.
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Product
Field-installation Type Color Meter (Four-wire Transmission)
HU-200CL
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HU-200CL connects flow through color detector Cl-20 and measures color and turbidity in the sample water. Suitable for monitoring purified water.
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Product
Panel-mount Type pH Meter (Four-Wire Transmission, 4 point ararm, Time sharing Proportional Control)
HP-960FTP
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HP-960FTP industrial pH meter is a high-end pH meter with a four-point alarm and a time sharing proportional control function.It connects pH sensor and measures pH and temperature in the sample water.It can also be linked with a cleaning device via an external input, extending its automatic operation time.Many types of electrodes are available to match the sample properties.
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Product
Field-installation Type Turbidity Meter (Four-Wire Transmission, Immersion Type)
HU-200TB-IM
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HU-200TB-IM connects immersion type turbidity/ MLSS sensor (SS-150) and measures turbidity and SS in activated sludge. The sensor can be immersed directly in the sample water tank. Optimal for turbidity and SS management of wastewater and intake.
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Product
Field-installation Type MLSS Meter (Four-Wire Transmission)
HU-200SS
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HU-200SS connects immersion type MLSS sensor (SS-90) and measures MLSS in activated sludge. A wide range (0-2000mg/L)of SS contents can be measured with excellent reproducibility using the near-infrared radiation transmission method. Any of the calibration curves of MLSS, Clay (inorganic mud) and Kaolin may be used as standard substances of SS. If "MLSS" is selected for an activated sludge treatment tank, "Clay" for the precipitation treatment of construction sludge, or "Kaolin" for white mud, a concentration can be obtained closer to an analyzed value.
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Product
Panel-mount Type Residual Chlorine Meter (Four-Wire Transmission)
HR-480
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HR-480 industrial residual chlorine meter takes sequential measurements of free residual chlorine, which is an indicator used in the inspection of the anti-bacterial properties of drinking water and swimming pools.The sensor(RS-1) combined with uses a galvanic method with no drive section, making it highly maintainable, and producing stable measurements over a long period.
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Product
Panel-mount Type pH Meter (Four-Wire Transmission)
HP-480
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HP-480 connects pH sensor and measures pH and temperature in the sample water. Suitable for monitoring and control of various production processes and wastewater treatment, etc. Many types of electrodes are available to match the sample properties.
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Product
Field-installation Type Ammonia Nitrogen Meter(Four-Wire Transmission)
HC-200NH
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HC-200NH is an ammonia nitrogen(NH4-N) meter using ion electrode method which is designed for aeration control in wastewater treatment.
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Product
Panel-mount Type Dissolved Oxygen Meter (Four-Wire Transmission, Membrane Type)
HD-480
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The HD-480 industrial dissolved oxygen meter takes sequential measurements of the concentration of dissolved oxygen, which is an indicator used in the management of activated sludge tanks in waste water processing, and the quality of the water in boilers, or rivers and waterways.As there is no need to exchange the membrane of the disposable sensor included, it is easy for anyone to use.
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Product
Panel-mount Type Conductivity Meter (Four-Wire Transmission, For Low-concentration)
HE-480C
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HE-480C connects conductivity sensor (ESH /FS Series) and measures conductivity and temperature in the sample water. This is a highly functional model, with high-performance temperature compensation, and is applicable to a wide range of tasks, from managing pure water for use with semiconductors, to managing the quality of boiler water.
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Product
RS-232 to RS-422/RS-485 Interface Converter
Model 9365
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FEATURES: DIN Rail Mountable; User Selectable RS-422 or RS-485; User Selectable Two- or Four-wire RS-485; DataSpy® LCD Display; Intelligent Control of RS-485 Transmitter and Receiver; DTE/DCE Compatible; Data Rates Up to 115.2 kbp.
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Product
Resistance Meter
MT8-4L
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М-module МТ8-4Л is a mezzanine module designed to measure the resistance of resistive sensors using a four-wire measurement circuit in eight channels (eight-channel digitizer). М-module МТ8-4Л is installed on the carrier of mezzanines - module НМ-М and is connected to it via a local information highway. Up to four m-modules of various types can be installed on the NM-M module. The NM-M module, together with the m-modules installed on it, forms a VXI module of size C-1 and is used to create information measuring VXI systems.
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Product
Battery Fault Insertion Unit
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The Battery Fault Insertion Unit (FIU) provides intelligent switching of cell-simulation channels for the Battery Simulator 1200. The switching capability enables simulation of open-circuit and short-to-rail fault conditions on any cell channel for the purposes of battery management system (BMS) testing. Additionally, a four-wire auxiliary input allows you to connect an external digital multimeter (DMM) instrument to any cell channel for very high-accuracy bypass current and cell voltage measurements. Each FIU provides 24 independently-programmable cell-switching channels for one or two 12-cell Battery Simulator 1200 units. Additional Battery Simulator 1200 and FIU instruments can extend functionality up to 120 series-connected cell channels.
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Resistance Measurement
PROMET
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High-precision micro-ohm measuring systems with adjustable DC test current for determining resistances on circuit breakers or inductive loads such as transformers, for example. The high-precision ohm meters of the PROMET series are used to determine very low electrical resistances in the µΩ range. The adjustable test current of up to 600 A in combination with a four-wire measuring method delivers measurement results which meet stringent accuracy requirements. State-of-the-art power electronics coupled with a robust design guarantee excellent reliability for use as a portable device in switching stations and industrial environments. Typical applications include determining the contact resistance of switchgear devices and determining the resistance on inductive loads such as transformers.
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Product
Field-installation Type Electric Conductivity Meter (Four-Wire Transmission, For High-concentration)
HE-200H
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HE-200H connects conductivity sensor (FES-125F,126F) and measures conductivity and temperature in the sample water. It can be used not only for measurement of electrical conductivity in aqueous solution, but also for concentration adjustment and rinse monitoring of CIP, etc., as well as for concentration monitor of process.
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Product
Transformer Winding Resistance Tester
KRI 9310
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KRI 9310 adopt Kelvin four-wire testing method, which effectively eliminates the influence of the resistance of the test line on the test results. It can be able to increases the current to 10A by which can test extremely low resistance to 0.01 Ω(such as amorphous alloy, Copper-nickel, nickel-chromium-iron, iron-chromium-aluminum etc). For the tested objects with high resistance value (CT/PT), the instrument can extend the range to 20 kΩ，so the wide resistance test range enables KRI9310 can cover 80% of the power transformer products on the market and switchgear bus-bar cable etc. The power of the tester use the built-in rechargeable lithium battery that can test hundreds of transformers by one time charging.
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Product
Panel-mount Type pH Meter (Four-Wire Transmission, Pulse Proportional Control)
HP-480PL
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HP-480PL industrial pH meter is a pH meter with a pulse proportional control function, which can drive a pulse pump directly.It connects pH sensor and measures pH and temperature in the sample water.As the HP-480PL has a high injection resolution per pulse, it can be used to control a pulse pump as part of a system for processing involving fine control of pH values, for example controlling the pH values of microscopic or small samples.
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Product
SparkFun Load Sensor Combinator
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The SparkFun Load Sensor Combinator is a bare PCB that combines four load sensors into a standard four-wire Wheatstone bridge configuration. If you open up an electronic bathroom scale, you’ll find a large rat's nest of wires. The Load Sensor Combinator was created to combine the 12 wires found in a bathroom scale into the standard four-wire Wheatstone bridge configuration.
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Product
Short Circuit Locator for Power Cables
A910
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The A910 is a short circuit locator designed for fault location in power cables. The instrument measures the ratio of the resistances of the two sections of failed conductor using a four-wire "Kelvin" connection, thus eliminating errors associated with contact resistances of the test leads. With the A910 you can determine if the cable has more than a short and locate the first and the last fault. The instrument locates fault with an insulation resistance up to 5 Mohms in cables that have a total resistance greater than 5mohm (approximately 90 m of 300 sqmm cable) and less than 30 kohms. The distance to fault is measured as a percentage of the total length of cable and is displayed on a large LCD display.
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Product
Panel-mount Type Residual Chlorine Meter (Four-Wire Transmission, polarography method type)
HR-480P
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Panel-mount type transmitter HR-480P connects residual chlorine sensor (RA-20) and measures residual chlorine and temperature in the sample water. Suitable for monitoring swimming pool and anti-bacterial properties of drinking water.
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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
Industrial pH Meter (Four-Wire Analyzer)
HP-200-K
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One-touch calibration function Realizes gentle measurement by combination with lead-free ORP electrode
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Product
Independent 24-bit Sigma-Delta Type (One for Each Channel)
TR1
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The TR1 provides 8 channels which can be individually programmed as a Thermocouple (TC) or a Resistance Temperature Detector (RTD) measurement interface. When configured as a TC, the channel can interface with virtually all thermocouple-type NIST temperature ranges. When configured as an RTD, the channel can interface to two, three and four-wire platinum RTD sensor configurations.
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Product
Field-installation Type Simplified Fluoride Ion Concentration Meter(Four-Wire Transmission)
HC-200F
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HC-200F is connected to a fluoride ion electrode (1009) to detect free fluoride ions in the sample water.(Total fluorine is not detected.) It is suitable for fluoride ion monitoring in effluent from factories, e.g., those of semiconductor FPD and glass manufacturers.
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Product
Digital Multimeters
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*5½-digit resolution to 8½-digit resolution DMMs*6ppm basic voltage measurement accuracy on the 8½-digit DMM for calibration laboratories*Fast, 1 Msample/s sampling speed to capture complex, low level current profiles from IoT devices or other wireless devices*Sensitivity of 1 µΩ and 1 pA to test low power devices for research, design, and manufacturing test*A wide range of measurement functions such as DC and AC volts, DC and AC current, two- and four-wire Ohms, continuity, frequency, period, RTD, thermistor, and thermocouple temperatures, diode test, and capacitance*Numerous interface options including LAN/LXI, USB-TMC, GPIB, and RS-232 for data acquisition and automated testing*Intelligence to execute tests and create customized measurements with minimal PC interaction*Measurement expansion up to ten channels
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Product
Panel-mount Type Resistivity Meter (Four-Wire Transmission)
HE-480R
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HE-480R connects resistivity sensor(ERF sereies) and measures resistivity and temperature in the sample water.The feature is the high-precision temperature compensation function.Its high-performance temperature compensation makes it ideal for sequential monitoring of ultra-pure water used in manufacturing processes in the semiconductor field, and many other fields, including the areas of electrical goods, foods and medicines.
