CMT-290 Ultra-Low Temperature Controller

The CMT-290 Ultra-Low Temperature Controller by Vectomag is a next-generation precision instrument for cryogenic and variable-temperature experiments.

Built upon mature multi-generation technology, it delivers exceptional resolution, accuracy, and stability, supporting multiple temperature-sensor types including diodes, thermocouples, platinum resistors, and negative temperature coefficient (NTC) sensors.

The controller integrates advanced dual constant-current balanced output technology, automatically adjusting excitation levels at ultra-low temperatures to minimize sensor self-heating and ensure reliable performance.

It provides multi-channel measurement (up to 10 sensors), dual closed-loop control (up to 200 W total output), and flexible communication interfaces — Ethernet, USB, and RS-485 — making it ideal for both laboratory research and industrial cryogenic systems.

The standard CMT-290 system includes:

• CMT-290 Main Controller (dual-loop, multi-channel)
• Standard temperature sensor set (diodes, Cernox, RTDs)
• Communication cables (Ethernet / RS-485 / USB)
• Heater connection and relay output terminals
• User manual and LabVIEW driver

• Minimum measurable temperature: as low as 300 mK (with appropriate sensors)
• 10-channel sensor input capability (2 standard + 8 expandable)
• Supports diodes, thermocouples, platinum RTDs, NTC sensors
• Dual control loops supporting two × 100 W or one × 200 W low-noise heater
• Self-tuning PID closed-loop control for stable and fast temperature regulation
• 24-bit ADC with 10 readings / second / channel for high-resolution acquisition
• Thermoelectric-potential compensation for resistive sensors
• ±10 V analog outputs, alarms, and relay control functions
• Multi-protocol communication: Ethernet / RS-485 / USB / MODBUS
• LabVIEW driver and data-logging software support
• Network operation: up to 247 units on one network

• Cryogenic and variable-temperature experiments (0.3 K – 1505 K)
• Semiconductor and superconductor characterization
• Magnetic and optical material temperature studies
• Low-temperature transport and resistivity testing
• Integration with vacuum cryostats or closed-cycle refrigerators
• Automated multi-point temperature control systems

• Additional temperature sensors (Cernox, Diode, Platinum RTD)
• Extended 10-channel sensor module
• Extra 200 W low-noise heater module
• Rack-mount installation frame
• Serial printer for data logging
• PC data-logging software package