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Guildline Instruments is a leading powerhouse in the world of engineering, renowned for designing, manufacturing, and marketing ultra-precise instruments for metrology and oceanography such as Precision AC/DC Resistance Standards, Direct Current Comparator Resistance Bridge, High Resistance Meter/Bridge, DC Voltage Divider, Transconductance Amplifier, AC/DC Current Shunts, Precision DC Current Sources along with AC as well DC Precision Current measurement Transformers etc. Since 1957, our instruments have been instrumental in cutting-edge research and establishing traceability to fundamental electrical standards. Our clientele includes national research laboratories, metrology institutes, calibration facilities, militaries, nuclear power plants, aerospace entities, and electrical and power industry companies.

ELECTRICAL METROLOGY


DC Voltage Divider & Power Analyzer

7520 Precision Automated DC Voltage Divider

  • Sub ppm ratio Uncertainties
  • Automated Self-Alignment (i.e. Self Calibration)
  • No External Standards required for Self-Alignment
  • Wider voltages range from 1:1 to 1000:1 & Reverse
  • Input voltage range from 1 to 1100 volts 

Asynchronous Power Analyzer 7220

  • 3-Phase Plus Neutral Measurements!
  • Input Current Ranges 5 Arms and 125 Arms!
  • Input Voltages up to 1250 Vpk
  • Able to Measure Any Signal Including Non-Sinusoidal and Quasi-Stationary!
  • Ideal for Noisy/Green Energy Sources!


RESISTANCE STANDARD & dECADE bOXES

9334A Precision DC Air Resistance Standards

  • Range : 1 µ to 100 GΩ 
  • Accuracy: As low as 2 PPM !
  • Stability: As low as 2 PPM per year
9336

9336-7 High Value Air Resistance Standards

  • Resistance Range 10MΩ  to 100 GΩ 
  • Stabilities Low as 10 ppm
  • Accuracy: As low as 2 PPM !
  • Low Temperature Coefficients
6636

Temperature Stabilized Resistance Standards series 6634A/6636

  • A Family of up to 10 elements
  • Range 0.1Ω to 100TΩ
  • Outstanding stability <2 ppm/year
  • Ultra low TC < ± 0.005 ppm/°C
  • Low thermal EMI-shielded Chamber
7330

AC/DC Resistance Standards 7330/7334

  • AC/DC Error: < 1 ppm at 1KHz
  • Stability: < 2 ppm/Year
  • Ultra Low T.C  <0.2 ppm/°C
    Range: 1Ω to 10 kΩ
  • Guard and Shield Compliant

9340-4T Precision 4-Wire Ultra Low Value RTD Simulators and DC Resistance Standards

  • Resistance Ranges include Decades from 1 µΩ to 10 kΩ
  • Excellent for milli-Ohm and micro-Ohm Applications and Instruments
  • True 4-Wire Terminal Design
  • Accuracy Better than  ± 0.01 %

9340 Precision DC Resistance Standards

  • Widest Available Resistance Range From 10 mΩ to 10 TΩ
  • Lowest Available Temperature Coefficients (As low as 5 ppm/°C down to 0.01 Ω)
  • Lowest Available Power Coefficients
  • 12 Month Stabilities as Low as < 10 ppm (Near Standard Resistor Performance)
  • Highest Current Handling Capabilities of Any Decade Standard (7 Amps)


RESISTANCE mEASUREMENT bRIDGES/mETERS

Direct Current Comparator Resistance Bridges Series 6622A

  • Widest Available Range from 1 mΩ ~1 GΩ
  • Best Accuracy: ± 0.015 ppm of Reading
  • Modular Design, Expandable Capabilities, Complete Investment Protection
  • Wide Range of Ratios: 0.1:1 ~ 100:1

High Resistance Measurement
Bridge/Meter 6540/6530

  • Bridge and Direct Measurement Modes of Operation
  • Resistance Range 100 kΩ to 20 PΩ
  • “True Ratio” Provides Multi‐Ratios from 1:1 up to 100:1
  • Test Voltages 1 to 1000 V

Resistance and Current Measurement
Systems 6625A

  • Complete Turn-Key System – Fully Integrated, Wired, Tested and Ready-to-Use
  • Widest Available Resistance Range from 1 μΩ ~1 GΩ with Internal Voltages to 1 kVdc
  • Precision Current Sources / Range Extension from 3 A to 10,000 A with Built-In Precision Current Source and Electronic Switching
  • Wide Range of Ratios: 0.1:1 ~ 100:1, and Up to 2,000,000:1 and More with Range Extension

High Current Range Extenders / Sources 6623A

  • Unique Guildline PATENTED Design
  • Dual Design – Extender and Precision DC Source
  • Includes Built-in Precision Current Source with Electronic Polarity Switching
  • Output Current Stability Typically < 10 ppm for 1000 A and Higher – Best in the World!
  • Advanced Modular Design, Over 64 Expandable Outputs in 150 A Increments to 10,000 A, Investment Protection
  • Measures Resistances Down to 0.1 μΩ
  • Automatic Control from 6622A Series Bridge

Resistance Measurement Scanners Model 6664C/6564

  • 8/16-channel input & 2-channel output
  • Gold flashed tellurium copper terminals
  • Thermoelectric Potentials: <20 nV
  • Up to 1000 volts


Precision current sources

Transconductance Amplifier Model 7810

  • 50 A and 100 A Models!
  • Calibrated Frequency Range (DC to 100 kHz)!
  • Uncalibrated 100 kHz to 2 MHz!
  • High 9V Voltage Compliance!
  • Unique Touch Screen Interface and Embedded Windows Computer!

DC Precision High Current Source 6623A-PCS

  • Precision DC currents up to 10,000 Amperes
  • Output Current Stability < 10 ppm for 1000 A and higher, Typically < 5 ppm
  • Programmable from 66259 USB Controller, or from 6622A Series Bridges
  • Modular Design, Expandable Capabilities in150 A Increments – Investment Protection
  • Built-in Single-Source Output Current with Electronic Polarity Switching
  • Eliminates Need for Mechanical Polarity Reversing Switches and Compressed Gas


precision cURRENT sHUNTS

Precision DC Current Shunts Model 9230A

  • Series Ranges from 10 A to 10,000 A
  • 3 Point Current Calibration Provided
  • < 10 ppm Long Term Stability
  • Extremely Low Self-Heating Effects

Multiple DC Resistor/Current Shunt Model 9211B

  • Multiple range Resistance or Current Shunt
  • Resistance range: 0.0003Ω ~ 10KΩ
  • Current range: 10µA ~ 300A
  • Accuracy: ± 100ppm
  • Low TC : < 5 ppm/°C

Precision AC/DC Current Shunts Model 7340/7350

  • 10 Ranges from: 1 mA to 100A
  • 6 Models from 0.01Ω to 1 kΩ
  • Accuracy: ±35 ppm
  • Low T C: <2 ppm/°C
  • True None- Inductive Design
  • Ruggedized EMI Shielded Enclosure


precision cURRENT transformers

Precision AC Current Transformers 7223CT-2S

  • High Precision AC Current Measurements!
  • Test Current Range: 2000A
  • Test Voltage Range: 100kV with insulating bushings
  • Fixed Permanent Accuracy!
  • Measurement Accuracy <5 ppm at Power Frequencies for Both Ratio and Phase Angle!
  • Stability Measurement < 5 ppm!

High Current DC Transformer Model 6624CT-3000

  • Measurement Accuracies as low as 10 ppm!
  • Stability Measurement as low as 3 ppm!
  • 3 Primary ranges (300. 1500 and 3000 Amperes)
  • Compatible with Guildline Precision Current Sources
  • Optional 66259 Provides automation for use with Guildline Precision Currents Sources