TC300B

TC300B is a Windows utility published by THORLABS Inc. that provides full control and monitoring of the company’s TC300B Heater and TEC Temperature Controller, a benchtop instrument widely used in photonics and laser laboratories to stabilize the temperature of optical components, laser diodes, and thermo-electrically cooled mounts. Version 2.0.1, the first public release, presents a single-window interface where users can set target temperatures between 5 °C and 85 °C with 0.1 °C resolution, switch between constant-temperature and constant-power modes, and tune PID parameters for optimal thermal response. Real-time graphs display sensor temperature, output current, and load power, while data-logging options stream these variables to CSV for later analysis in MATLAB or Python. The driver layer automatically detects the controller when it is connected via USB, enumerating up to four units on the same bus for multi-channel setups; TEC and heater limits are polled from on-board EEPROM to prevent overdriving the connected Peltier element or resistive heater. Security features include password-protected calibration coefficients and an automatic shutdown timer that disables the output if communication is lost for more than five minutes. The installer bundles both 32- and 64-bit USB drivers signed for Windows 10 and 11, eliminating the need for separate THORLABS driver packages and allowing the software to run alongside other ThorCam or Kinesis applications without address conflicts. Typical use cases cover stabilizing laser-diode mounts for interferometry, locking optical crystals to millikelvin stability for cavity ring-down experiments, and cycling test specimens in environmental chambers. TC300B is available for free on get.nero.com, with downloads delivered through trusted Windows package sources such as winget, always providing the latest version and supporting batch installation of multiple applications.

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