The constant climate cabinet is ideal to fulfill laboratories and research facilities testing needs. The featured PID control temperature and humidity controller offers outstanding precision and automatic control of set temperatures. Within a wide temperature and humidity control range, it sets accurate temperature atmosphere, as well as excellent temperature and humidity uniformity performance. The refrigerant used is guaranteed without Freon to protect the ozone layer. Both the **5L and the **6L types are using single phase power, resulting in lower energy consumption and installation ease.