

Isotech
Isotech MILLIK 923 Digital Thermometer, -270 to 1820 °C, 3 Input Channels
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Key specs from the product description
- Model
- 923 (milliK)
- Input channels
- 3 (2 sensor channels, 1 process input); expandable to 33
- Measurement range
- -270 °C to 1820 °C
- SPRT range
- 0-115 Ω
- PRT range
- 0-460 Ω
- Thermistor range
- 0-500 kΩ
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Datasheets & manuals
Isotech MILLIK 923 Digital Thermometer, -270 to 1820 °C, 3 Input Channels
Overview
The Isotech MILLIK 923 Digital Thermometer is a precision measuring instrument built for calibration laboratories and light industrial environments. It reads platinum resistance thermometers, thermistors, thermocouples and process instrumentation (4-20 mA) across a temperature span of -270 °C to 1820 °C, with two input channels for sensors and a third channel for current. Using a Sigma Delta analogue-to-digital converter, the display resolves 0.0001 °C (0.1 mK), backed by a true measurement resolution of 28 µΩ, equivalent to about 0.07 mK on PRT inputs.
Accuracy is specified at better than ±5 ppm over range for SPRTs/PRTs (3 mK at 0 °C initial, 5 mK over the full range), ±2 µV for thermocouples and ±1 µA for transmitters, with a 1-year drift budget also published. Beyond measurement, the milliK can control Isotech temperature sources such as dry blocks and liquid baths, sequencing through a programmable list of set points while logging readings to internal memory or a USB drive. Channel expansion to 33 inputs makes it suitable as the core of a complete calibration bench.
Features
- Measurement range of -270 °C to 1820 °C depending on the connected sensor
- Accepts 25 Ω SPRTs, 100 Ω PRTs, thermistors, thermocouples and 4-20 mA transmitters
- Accuracy of < ±5 ppm for PRTs, ±2 µV for thermocouples and ±1 µA for transmitters (initial)
- Display resolution of 0.0001 °C with a 28 µΩ true measuring resolution for PRT inputs
- Two sensor channels plus a current channel, expandable to a 33-channel measuring system
- Controls Isotech dry blocks and liquid baths and logs data to internal memory or USB
- Displays in °C, °F, K, Ω, mV and mA with numeric and graphical modes
- Sensor currents of 1 mA and 1.428 mA (reversing) for SPRTs/PRTs and 5 µA for thermistors
Applications
- Calibration of reference SPRTs, PRTs and industrial RTDs in secondary laboratories
- Automated calibration runs controlling Isotech dry blocks and temperature baths
- Thermocouple and 4-20 mA transmitter verification in light industrial settings
Isotech MILLIK 923 Digital Thermometer, -270 to 1820 °C, 3 Input Channels Technical Specifications
| Model | 923 (milliK) |
|---|---|
| Input channels | 3 (2 sensor channels, 1 process input); expandable to 33 |
| Measurement range | -270 °C to 1820 °C |
| SPRT range | 0-115 Ω |
| PRT range | 0-460 Ω |
| Thermistor range | 0-500 kΩ |
| Thermocouple input | ±115 mV |
| 4-20 mA process input | 0-30 mA, isolated 24 VDC supply included |
| Accuracy (SPRTs/PRTs) | 5 ppm initial, 7 ppm over 1 year |
| Accuracy (thermocouples) | 2 µV initial, 4 µV over 1 year |
| Temperature accuracy | 3 mK at 0 °C initial, 5 mK over full range (initial) |
| Display resolution | 0.0001 °C (0.1 mK); 28 µΩ true resolution |
| Display units | °C, °F, K, Ω, mV, mA |
| Temperature conversions | IEC60751 (2008), Callendar-Van Dusen, ITS90; IEC584-1 thermocouples (B, E, J, K, N, R, S, T) |
| Sensor currents | 1 mA / 1.428 mA ±0.4% (reversing) for PRTs; 5 µA (reversing) for thermistors |
Manufacturer information: Isotech milliK Precision Thermometer product page
Price $2,801.00 USD as listed on 05 Nov 2026. Request a firm quote: https://na.indomultimeter.net/products/isotech-millik-923-digital-thermometer-270-to-1820-c-3-input-channels
Shipping. We ship worldwide. See the shipping policy.
Documents. Instruments ship with calibration documentation traceable to national standards. Some models, such as the Mensor CPG2500, also ship with an A2LA accredited ISO/IEC 17025 certificate.
Warranty. See the warranty policy.
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