mK Grade High-Precision Thermometer Readout
Introduction
The DTMC-mK301 is a new-generation, multi-channel, ultra-high-precision thermometer readout developed for temperature metrology and calibration. It integrates high-accuracy electrical measurement technology, intelligent interface design, and application-specific functions to fully meet the calibration needs of both laboratories and fieldwork. The DTMC-mK301 measures: standard and industrial RTDs, thermocouples, thermistors, temperature transmitters, humidity sensors, DC current, resistance, and voltage signals. It supports ITS-90 and IEC 60751 standards and features built-in thermophysical conversion tools, intelligent sensor management, and broad compatibility across industries such as power, petrochemical, metrology, metallurgy, biotechnology, pharmaceuticals, and scientific research.
mK-Grade Precision Thermometer Readout
· Resolution: 0.00001 °C
· Accuracy: 5 ppm @ 0 °C (using SPRT)
Channels & Sensor Support
· 3 input channels: CH1 and CH2 (front), CH3 (rear)
· Supports 2 standard platinum resistance thermometers (SPRT), 2 standard thermocouples
· Supports RTDs: Pt (Pt25, Pt100, PtX), Cu (CuX), and Ni (NiX)
· Supports thermocouples: K, N, J, E, T, R, S, B, WRe3, WRe5
· Supports thermistors: 0 kΩ to 40 kΩ
· Supports temperature transmitters: 0 mA to 20 mA / 4 mA to 20 mA
· Automatic current reversal for RTD input to eliminate EMF thermal voltage error
Thermocouple Cold Junction Compensation
· Multiple compensation modes supported: internal compensation, external compensation, fixed compensation
Multiple Conversion Algorithms Supported
· ITS-90, Callendar-Van Dusen, IEC 60751:2008, polynomial equations, Steinhart–Hart, B-Value, linear conversion
Sensor Management Features
· Supports management of up to 100 sensor profiles
· Editable sensor parameters improve measurement accuracy
Smart Sensor Capability
· Automatic detection and data upload when a smart sensor is connected
Smart Terminal Box Support
· Stores and auto-uploads SPRT certificate values
· Plug-and-play operation; no need to manually input certificate data
User Interface & Display Modes
· Five display modes: single-channel, dual-channel, triple-channel, curve display, table display
· Real-time display of sensor information, measurement data, and trends
· Automatic statistical analysis: max, min, average, peak-to-peak, standard deviation, stability, etc.
· Real-time curve plotting
· 7-inch high-resolution capacitive touchscreen
Thermophysical Calculator
· Built-in thermophysical calculator
· Integrated ITS-90 fixed-point reference data
Data Logging & Storage
· Timestamped data recording
· 8 GB internal storage; external USB drive supported
· SCPI communication protocol over RS232/WLAN
· Screenshot feature available on all display screens, no need for manual data recording
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Model |
DTMC-mK301-PRTG |
DTMC-mK301G |
DTMC-mK301HG |
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Multi-channel temperature meter |
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Nanovoltmeter |
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Sensor testing |
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SPRT/RTD Measurement |
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RTC/TC Measurement |
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Transmitter |
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Thermistor Measurement |
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Temperature switch test |
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Constant temperature source test |
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Electronic scanning switch |
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Smart Sensors |
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Smart Junction Box |
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Thermal Calculator |
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Sensor Management |
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Data storage |
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Smart Communications |
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Technical Parameters
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Electrical test indicators |
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Applicable Models |
DTMC-mK301HG |
DTMC-mK301G |
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Channel Type |
Range |
Input range |
Resolution |
Accuracy(1 year) |
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SPRT 25 |
120Ω |
0Ω to 125Ω |
0.01mΩ |
15ppm+3ppm |
30ppm+5ppm |
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SPRT 100 |
400Ω |
0Ω to 400Ω |
0.01mΩ |
15ppm+3ppm |
30ppm+5ppm |
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PRT |
100Ω |
0Ω to 110Ω |
0.01mΩ |
15ppm+3ppm |
30ppm+5ppm |
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PRT |
400Ω |
0Ω to 410Ω |
0.01mΩ |
15ppm+3ppm |
30ppm+5ppm |
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PRT |
1KΩ |
0Ω to 1.1KΩ |
0.01mΩ |
28ppm+1ppm |
30ppm+1ppm |
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PRT |
4KΩ |
0Ω to 4.1KΩ |
0.01mΩ |
28ppm+1ppm |
30ppm+1ppm |
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TC |
30mV |
-35mV to 35mV |
10nV |
36ppm+6ppm |
40ppm+7ppm |
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TC |
100mV |
-120mV to 120mV |
10nV |
36ppm+6ppm |
40ppm+7ppm |
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DCV |
1V |
-1V to 1V |
10nV |
30ppm+2ppm |
30ppm+2ppm |
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DCV |
10V |
-10V to 10V |
10nV |
30ppm+2ppm |
30ppm+2ppm |
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Transmitter |
25mA |
0mA~25mA |
0.001mA |
0.02% |
0.02% |
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Note: The test environment temperature specification conditions are 1 hour warm-up time; The environment temperature is 20℃ ±1℃; The environment relative humidity is 40%RH |
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Temperature index |
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Type |
Graduation |
Temp.range |
Accuracy |
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SPRT |
Pt25 |
-189 ℃ to 660 ℃ |
0.0033 ℃@-200 ℃ 0.0060 ℃@0 ℃ 0.0100 ℃@100 ℃ 0.0180 ℃@300 ℃ 0.0280 ℃@600 ℃ |
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Pt100 |
-189 ℃ to 660 ℃ |
0.0033 ℃@-200 ℃ 0.0060℃@0 ℃ 0.0100 ℃@100 ℃ 0.0180 ℃@300 ℃ 0.0280 ℃@600 ℃ |
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PRT |
PT10 |
-189 ℃ to 961 ℃ -200 ℃ to 740 ℃ |
0.005℃@-200 ℃ 0.0009℃@-100 ℃ 0.012℃@0 ℃ 0.031 ℃@600 ℃ |
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Pt100 |
-189 ℃ to 961 ℃ -200 ℃ to 740 ℃ |
0.0080℃@0 ℃ 0.0185 ℃@300 ℃ 0.0280 ℃@600 ℃ |
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PT200 |
-189 ℃ to 961 ℃ -200 ℃ to 740 ℃ |
0.0020℃@-200 ℃ 0.0048℃@-100 ℃ 0.0300 ℃@600 ℃ |
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TC |
K |
-270 ℃ to 1370 ℃ -100 ℃ to 1300 ℃ |
0.038℃@600℃ 0.050℃@1000℃ |
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N |
-270 ℃ to 1300 ℃ -200 ℃ to 1300 ℃ |
0.038℃@600℃; 0.050℃@1000℃ |
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J |
-210 ℃ to 1200 ℃ -100 ℃ to 900 ℃ |
0.018℃@300℃ 0.026℃@600℃ |
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E |
-210 ℃ to 1000 ℃ -90 ℃ to 700 ℃ |
0.020℃@300℃; 0.028℃@600℃ |
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T |
-270 ℃ to 400 ℃ -150 ℃ to 400 ℃ |
0.01℃@0℃; 0.02℃@200℃ |
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R |
-50 ℃ to 1760 ℃ 0 ℃ to 1760 ℃ |
0.055℃@300℃; 0.06℃@600℃; 0.08℃@1000℃ |
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S |
-50 ℃ to 1760 ℃ 0 ℃ to 1760 ℃ |
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B |
250 ℃ to 1820 ℃ 300 ℃ to 1800 ℃ |
0.07℃@1000℃; 0.068℃@1200℃; 0.088℃@1800℃ |
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Remarks: It doesn’t include the sensor's own deviation |
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Function parameters |
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Function |
Type |
Description |
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Channels |
3 |
CH1 & CH2 (front),CH3(rear).External 8-Channel Electronic Scanning Switch (Optional) |
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Input |
CH1/CH2 |
TC/RTD |
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CH3 |
Current |
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Input Connectors |
Thermal resistor (front panel) |
Lemo EPG.1B.306.HLN 6-pin connector |
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Thermal resistor (rear panel) |
4mm Low-thermal posts |
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TC |
Mini TC Connectors(ASTM E 1684-05) |
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Drive current |
SPRT/PRT |
1mA(±0.1%)(Auto-reversing) |
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Cold Junction Compensation(CJC) |
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Built-in cold junction compensation External Cold Junction Compensation (CJC) CH1 and CH2 can be CJC to each other User-defined cold junction temperature. |
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Cold junction compensation accuracy |
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±0.1℃ |
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Smart Sensors |
SPRT/PRT |
Support |
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Sensors Management Quantity |
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100 Pcs |
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Sensor Management |
Conversion formula |
ITS-90 IEC60751(2008), Callendar-van Dusen Steinhart-Hart, polynomial B Value Multinomial |
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Sensor support |
RTD |
SPRT Pt25/Pt100 PRT: Pt100/Pt1000/Pt-X Copper resistor: Cu50/Cu100/Cu-X Nickel resistor:Ni50/Ni120/Ni1000 Thermistor:(0-40K) |
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TC |
Standard Thermocouple: B/S Industrial Thermocouples: K/N/J/E/T/R/S/B/WRe3/WRe5 |
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Transmitter |
Temperature transmitter:(0-20mA/4-20mA) |
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Sensor |
Type / index |
Temperature range (°C) |
Coefficients |
Freezing point |
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Standard platinum resistance thermometer (SPRT) |
SPRT |
0 to 660.323 |
a7, b7, c7 |
Stannum (WSₙ), Zinc (WZn), Aluminum (WAl) |
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0 to 419.527 |
a8, b8 |
Stannum (WSₙ), Zinc (WZn) |
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0 to 231.928 |
a9, b9 |
Stannum (WSₙ), Indium (WIn) |
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-189.834 to 0 |
a4, b4 |
Argon triple point (WAr), Mercury triple point (WHg) |
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0 to 156.5985 |
a10 |
Indium (WIn) |
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0 to 29.7646 |
a11 |
Gallium melting point (WGa) |
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-38.8344 to 29.7646 |
a5, b5 |
Gallium melting point (WGa), Mercury triple point (WHg) |
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Industrial RTDs |
Pt100 |
-200 to 850 |
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Cu100 |
-50 to 150 |
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Standard thermocouples (RTC) |
S (Standard) |
300 to 1300 |
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B (Standard) |
0 to 1820 |
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Industrial thermocouples (TC) |
S |
-50 to 1760 |
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R |
-50 to 1761 |
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B |
0 to 1820 |
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K |
-270 to 1370 |
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N |
-270 to 1300 |
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E |
-270 to 1000 |
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J |
-210 to 1200 |
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T |
-270 to 400 |
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WRe3 (D) |
0 to 2310 |
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WRe5 (C) |
0 to 2311 |
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