The SANSEL Precision Humidity and Temperature Generator is engineered to create highly stable and controlled humidity and temperature environments for calibration and testing applications. Designed with a large chamber volume, it enables simultaneous calibration of multiple sensors, transmitters, portable instruments, and data loggers from different manufacturers. The system generates humidity from 3% RH to 95% RH and temperature from 5°C to 60°C, with psychrometric dew point indication from -30°C to 45°C. Utilizing mixed-flow humidity generation technology, a desiccant-based dehumidification system, external humidifier, and solid-state Peltier heating and cooling, this generator delivers metrology-level performance, excellent stability, and uniformity for demanding laboratory environments.