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Millikelvin Thermometer MKT 50

Millikelvin Thermometer MKT 50
Millikelvin Thermometer MKT 50
Product Code : 01
Product Description

In combination with two highly precise Platinium Resistance Thermometers your MKT 50 Millikelvin Thermometer measures the temperature to the highest level of accuracy. MKT 50 is by far the best-priced thermometer for applications which require a low measuring uncertainty of 0.01 oC to 0.001 oC.

Key Features

Highest accuracy

  • Resolution 0.0001 oC (0.1 mK)
  • Measuring uncertainty over the whole measuring range 0.001 oC (= 1 mK)
  • Anton Paar's patented direct current measuring method (previous models MKT 25/100)

Temperature calculation according to conventional methods

  • DIN IEC 751 for industrial Platinum Resistance Thermometers (PRT)
  • ITS-90 for standard thermometers (SPRT: Standard Platinum Resistance Thermometer)
  • Comparison calibration (PRT) or fixed point calibration (SPRT)
  • Calibration data for 30 sensors can be saved

Highest stability - easy adjustment

  • AD converter does not drift
  • Adjustment of the internal reference resistance by connecting a standard resistor
  • Automatic new calculation of the reference resistance in less than 2 minutes

Modern interfaces plus battery and mains operation

  • LAN connection (Ethernet)
  • Serial interface RS-232
  • Mains adapter
  • Battery operation: 2 AA batteries (>10 hours)

Applications :

  • Highly accurate comparison calibrations of all types of thermometers in liquid baths
  • Reference thermometer for all applications and branches
  • Calibration of standard thermometers at temperature fixed points according to ITS-90

Technical Specifications :

Measuring range


-260 to +962 oC (-418 to +1764 oF)


0 to 440 Ω

Uncertainty of measurement


< 1 mK (Pt 100)


< 400 µΩ



0.1 mK (Pt 100)


40 µΩ

Measuring sensor

Pt 100 or Pt 25.5 (DIN IEC 751 or ITS-90)

Measuring current

0.41 mArms

Internal reference resistor

400 Ω (Vishay)

Number of sensor inputs


Sensor connection

4 wire (Lemo 1S304)

Measuring time (for both channels)

1.44 seconds

Data outputs

RS 232 D (optionally USB with USB-RS232 converter); LAN (Ethernet, 10 Mbit)

Ambient operating temperature

0 to 35 oC (for highest accuracy 20 to 25 oC recommended)

Temperature coefficient

< 0.3 ppm/oC

Power supply

Mains adapter 7.5 V or 2 x AA batteries

Dimensions (L x W x H)

approx. 240 x 190 x 110 mm (9.5 x 7.5 x 4.3 inches)


approx. 2 kg (4.4 lbs)

refers to the calibration of the reference resistor without contribution of the sensor (confidence level: 95 %, number of measurement values: 50, reference temperature: 23oC)


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