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microK GOLD – a unique package
Best performance, documented, guaranteed with an unmatched satisfaction promise.

Award Winning
In April 2017 Isotech won a Queen’s Award for Enterprise in the Innovation category for the co-development of the microK, read more in our news section.

Confidence in Thermometry Bridges
The microK range of thermometry bridges have rapidly established themselves as the number one choice for temperature metrologists. Many NMIs are now using the new drift free microK technology and sales have exceeded our initial expectations.
Of course the microK is not the only thermometry bridge available, there are both older and newer designs of bridge and all claim advantages with performance or measuring method.

AC or DC Measurement
In the past it was the case that AC Bridges operated with lower noise than DC bridges but the microK uses a new parallel processing technique to match or exceed that which previously needed impedance matching and the use of transformers.

Different manufactures claim performance in different ways and it can be confusing to compare specifications. With the availability of the automatic resistance bridge calibrator more and more bridges are being calibrated with reports published, the microK is consistently shown to exceed its specification, which is not the case for all! Ask us for the latest reports.

With claim and counter claim we want to give you confidence and have introduced the microK GOLD package. With microK GOLD you get

  • Best Performance – less than 30ppb ratio accuracy – drift free
  • Evidence – shipped with a report documenting the performance Recalibration in years two and three included – return for further evidence
  • Three Year Warranty

Now with the RBC Bridge performance can be measured – with microK GOLD you get evidence at the time of delivery and you can return it for recalibration in year two and three. Guaranteed and documented performance with a unique satisfaction promise.

We challenge you to find any other company to report ratio accuracy, measured with the RBC and who guarantee that for three years.


ParametermicroK GOLD
Accuracy Whole Range (SPRT Ro ≥ 2.5Ω) [1]<0.03ppm
Ratio Resolution1 pbb
Resolution Voltage10nV
TC (resistance ratio) [4]0ppm/ ° C
Resistance Range0-100 kΩ
Voltage Range (Thermocouple)±125mV
Internal Resistance Standards25, 100, 400Ω
Internal StandardTCR <0.5ppm/°C
Resistor StabilityAnnual Stability <2ppm/year
InterfacesRS232, GPIB & USB & Ethernet
Power25W maximum, 1.5A (RMS) maximum




microK Gold

-200°C to 1800°C

Best performance, documented, guaranteed with an unmatched satisfaction promise.

  • Ratio Accuracy to <0.02ppm (20ppb) with Zero Drift
  • SPRTs, PRTs, RTDs, Thermistors and Thermocouples
  • Reliable 21st Century 100% Solid State Design

We are online and ready to chat to you if you need any advice and support, or if you prefer you can fill out the form below.

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Or call +44 01704 543830

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