This document introduces the main features and technical specifications of the NA222 cold and hot constant temperature controller, including automatic switching between refrigeration and heating modes, compressor startup delay protection, and temperature probe abnormal alarm. The temperature display range of the controller is -50°C to 125°C, and the temperature setting range is -45°C to 120°C. The power supply voltage is AC 220V±10% or 380V±10%, and the output contact capacity is 20A/250VAC. The controller is suitable for use in environments with temperatures from -10°C to 45°C and humidity ≤85% without condensation. It uses an NTC temperature sensor and complies with the standard Q/320585 XYK 01 (NA222-CHT).
