Millikelvin Thermometer: MKT 50

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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 °C to 0.001 °C.

Highest accuracy

Resolution 0.0001 °C (0.1 mK)
Measuring uncertainty over the whole measuring range 0.001 °C (= 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

Measuring range
Temperature	-260 to +962 °C (-418 to +1764 °F)
Resistance	0 to 440 Ω
Uncertainty of measurement*
Temperature	< 1 mK (Pt 100)
Resistance	< 400 µΩ
Resolution
Temperature	0.1 mK (Pt 100)
Resistance	40 µΩ
Measuring sensor	Pt 100 or Pt 25.5 (DIN IEC 751 or ITS-90)
Measuring current	0.41 mA_rms
Internal reference resistor	400 Ω (Vishay)
Number of sensor inputs	2
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 °C (for highest accuracy 20 to 25 °C recommended)
Temperature coefficient	< 0.3 ppm/°C
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)
Weight	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: 23 °C)

Most of the documents in this area can be downloaded directly. For some documents you need to register and then send a request to Anton Paar. Your download request will be processed as soon as possible by the responsible sales partner.