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Isometric View Showing Connections on the microK2 Precision Thermometry Bridge
Isometric View of Temperature Graph on the microK2 Precision Thermometry Bridge
Close Up View of USB Ports on the microK2 Precision Thermometry Bridge
Front View of microK2 Precision Thermometry Bridge
People using the microK2 Precision Thermometry Bridge
Isometric View Showing Connections on the microK2 Precision Thermometry Bridge
Isometric View of Temperature Graph on the microK2 Precision Thermometry Bridge
Close Up View of USB Ports on the microK2 Precision Thermometry Bridge
Front View of microK2 Precision Thermometry Bridge
People using the microK2 Precision Thermometry Bridge

DESCRIPTION

The microK² builds on the success of the original microK models that were quickly adopted by the world’s leading National Metrology Institutes and commercial laboratories. Retaining Isotech’s innovative technology and operating mode to achieve accuracies as low as 7.5 μK, microK² remains first choice to measure with SPRTs and supports all standard thermometer types including Standard Thermocouples, Industrial PRTs and Thermistors.

New: The microK² introduces several new features designed to enhance usability, accuracy, and versatility. A notable addition is the new fourth channel, which accepts SPRTs, reference resistors, or the channel expander, offering greater flexibility in measurement systems. The touchscreen has been upgraded to a 10.1-inch high-resolution display with improved capacitive touch technology, ensuring a more responsive and intuitive user interface, input terminals are now more robust and easier to use. Enhanced connectivity options now include Ethernet, two RS232 serial ports, and three USB ports, with new software features.

Performance by Design – Inherently Drift-Free: The microK was developed with a clear design philosophy: to ensure genuine, long-term performance without relying on “tweak pots,” software adjustments, or self-calibration. This innovative approach has resulted in a resistance ratio accuracy that is uniquely drift-free, ensuring unparalleled accuracy and stability.

As a ratio bridge, the microK leverages a substitution topology that inherently eliminates drift. With no need for compensation circuits, software offsets, or routine calibration, the microK maintains its performance without requiring adjustments or service interventions, delivering consistent, reliable measurements year after year, thereby reducing operating costs.

Since its introduction in 2006, the microK has been rigorously studied and validated by temperature metrologists worldwide, confirming its superior performance and reliability.

For an in-depth understanding of the microK’s technology and performance, visit our technical library.

SPECIFICATION

ParameterModel
microK²
Temperature Range*-200°C to 1800°C
microK² ELITE
Accuracy, Whole Range30 ppb
Equivalent Temperature Accuracy
Whole Range		30 μK
Equivalent Temperature Accuracy
Water Triple Point		7.5 μK
microK² 60
Accuracy, Whole Range60 ppb
Equivalent Temperature Accuracy
Whole Range		60 μK
Equivalent Temperature Accuracy
Water Triple Point		15 μK
COMMON Specifications
Weight13.2kg
Resolution, Temperature0.001 mK 0.000001°C
Input Channels NEWFour – three front and one rear
Ratio RangeUnlimited
Ratio Accuracy StabilityZero Drift
Ratio Accuracy Temperature CoefficientZero
Resistance Range0 – 500 kΩ
Keep Warm CurrentEach Channel Individually Programmable
Voltage Range (thermocouple)125mV
Voltage Accuracy 0 – 20 mV0.15 μV Equivalent to 0.006°C for a Platinum / Gold thermocouple at 1000°C
Resolution Voltage10nV
Cold Junction ModeExternal and Remote with PRT
Sensor Current NEWEach Channel Adjustable 0 – 14.2 mA
Cable LengthLimited to 10Ω per core and 10nF shunt capacitance (equivalent to 100m of RG58 coaxial cable)
Temperature Conversions NEWPRTs: ITS-90, Callendar-van Dusen. Thermocouples:
IEC 60584-1 Ed. 3.0 2013 (B, E, J, K, N, R, S, T), L, Pt/Pd and Au/Pt, Thermistors: Steinhart-Hart, Polynomial
Internal Resistance Standards25, 100, 400Ω
Optional Internal Values1, 10, 10KΩ
Internal Standard Resistor StabilityTCR < 0.5 ppm/°C and stability < 2 ppm/year
Input ConnectorsUpgraded: Gold Plated 4mm binding posts for plugs,
spades or bare wires, material tellurium-copper alloy for low thermal EMF
InterfacesEthernet, 3 x USB Host, 2 x RS232, IEEE
Store Calibration CoefficientsUnlimited
Datalogger32 GB Storage
Expandable NEWAdd up to 90 expansion channels
Switching TechnologySolid State
UnitsRatio, V, Ω, °C, °F, K
Display10.1-inch high-resolution touchscreen with anti glare treatment
Operating ConditionsFull Specification: 15 – 30°C 10 – 80% RH Operational: 0 – 40°C 0 – 95% RH
Power85 – 264 Vac 50/60 Hz 20 watts maximum
Dimensions539mm x 200mm x 300mm (19″ Rack Mountable)

DOWNLOADS

VIDEOS

microK² Precision Thermometry Bridge

-200°C to 1800°C

The microK² builds on the success of the original microK models that were quickly adopted by the world's leading National Metrology Institutes and commercial laboratories. Retaining Isotech's innovative technology and operating mode to achieve accuracies as low as 7.5 μK, microK² remains first choice to measure with SPRTs and supports all standard thermometer types including Standard Thermocouples, Industrial PRTs and Thermistors.

  • Accuracy and Stability: Superior resistance ratio accuracy and zero drift to ensure long-term stability
  • Trusted by NMIs: Widely recognised by leading NMIs with independent reports validating its exceptional performance
  • Second Generation: Improved performance with new features and a 10.1-inch high-resolution touchscreen for clear visualisation of measurements and data

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