AT840 Series Constant Temperature Humidity Chamber is suitable for compatibility tests of rubber, plastic, leather, home appliances, instruments, meters, components and other products under high temperature, low temperature and humid environments. This machine conforms to GB/T 2423.1, GB/T 2423.2, GB/T 2423.4, etc. This instrument complies with the following international and industry standards. GB/T: GB/T 2423.1, GB/T 2423.2, GB/T 2423.4. Structure. The internal chamber is made of a 1.2mm thick 304 SUS stainless steel wire drawing board, and the external chamber is made of a 1.5mm thick high-quality cold-rolled steel board with spraying treatment. Imported sealing material and a unique silicone sealing structure between the door and doorframe ensure a good sealing effect and ageing resistance. It adopts an internationally popular light pressure type door lock, ensuring a good sealing effect of the chamber door. The chamber door has a hollow glass observation window and a lighting device, allowing clear observation of the internal test specimen. The bottom of the equipment is equipped with swivel casters, which can adjust the height of the equipment and facilitate movement. Heating system. The thermal insulation material adopts high-quality superfine glass fiber insulation cotton, with a long service life and good thermal insulation effect. The heater adopts stainless steel stents and a rack-type electric heater, which heats up quickly, has a long service life and high sensitivity. Cooling system. Imported refrigeration compressor with large cooling capacity, low noise, low energy consumption and high efficiency. Finned evaporator for fast heat transfer. Imported oil separator is adopted. R404A and R23 environmental protection refrigerants are used. Electrical control system. The temperature and humidity controller adopts PLC control. Level A Pt100 platinum resistance sensor with high accuracy and sensitivity. Control mode: thermal equilibrium temperature adjusting mode. Executive components, AC contactor, thermal relay and solid-state relay use the French "Schneider" brand, with reliable quality. Simple operation and easy maintenance. Touch screen control with real-time curve display is optional, and data can be output and printed. (Optional). Technical Specification Model: AT840 Series Temperature range: 4~60℃, -8~60℃, -5/-20/-40/R.T +10℃ ~+85℃ Temperature fluctuation: ±0.5℃ Temperature uniformity: ±2℃ Heating rate: 2～3℃/min Humidity range: 50%~95% RH @ 4℃ ~+60℃; 60%~85% RH @ R.T +10℃ ~+85℃ Humidity uniformity: +2%/-3% @ 75% R.H; ±2%~5% @ 75% R.H Noise: ≤65dB Power supply: AC220/380V 50Hz