Product Features 
Double door easy access design
Setting or program operation modes
Standard water cooled cooling mode
Single-stage or cascade stage refrigeration system with semi-hermetic compressor
Balanced temperature and humidity control system
A combination of control panel, electric switchboard, insulation board, forced fan, heater, humidifier and refrigeration unit
Water and electricity system separating design 
Tube bending machine for copper tube bending decreasing the welding points to keep compressor working in higher efficiency and better energy-saving
Mainly 7 standard room sizes of 28 different test specifications
Refrigerator uses original Europe/America compressor and CFC free refrigerant
Refrigeration system adopts cascade low temperature circuit design
Integrated board units for easy assembly and disassembly 
Shell is made of high quality stainless steel (SUS304). Solid, waterproof and elegant structure
Multiple wings air supply mode and the horizontal diffusion and ventilation heat exchange circulatory system keeps interior chamber temperature and humidity uniformity
When an exception occurs, controller screen will automatically display fault status in real time, cut off the power supply switch and provide troubleshooting techniques 
Doors and chamber uses dual-layer insulation gasket to ensure chamber sealing quality

Standards and Test Methods
GB/T 2423.1-2001
GB/T 2423.2-2001
GJB 150.3-1986
GJB 150.4-1986
GB/T 5170.2-2008
GB/T10592
GB/T10586
IEC60068-2-1
IEC60068-2-38 
IEC60068-2-78

Specifications of Walk in Chambers
Models		ATW -
		4	6	8	13	17	21
Interior Dimensions (mm)	W	2100	3000	3900	3000	3900	4800
	H	2100	2100	2100	2100	2100	2100
	D	2050	2050	2050	4300	4300	4300
Exterior Dimensions (mm)	W	3250	4160	5050	4160	5050	5950
	H	2350	2350	2350	2350	2350	2350
	D	2250	2250	2250	4500	4500	4500
Interior Volume (m3)		9	12.9	16.7	27	35.2	43.3
Door Size (mm)		Single Door: W800xH1800; Double Door: W1600xH1800
Power Supply		AC 380 V ± 10% 50Hz, 3 Phase 4 Wires + Ground Wire
Temperature
Temperature Range		Maximum: 80℃, 120℃; Minimum: -60℃/-50℃/-40℃/-30℃/-20℃/-10℃/0℃
Temperature Constancy (±℃)		0.5
Temperature Uniformity (±℃)		2
Heat up Time		(+20℃～+80℃, Within 60 min)
Cool Down Time		(+20℃～-55℃/-40℃/-20℃/-10℃, Within 120 min/90 min/60 min/45 min)
Ambient Temperature (+℃)		5～35
Humidity
Humifdity Range (R.H)		10%, 20%, 30%～95%
Humidity Constancy (±R.H)		2.50%
Humidity Uniformity (±R.H)		5.00%
Material
Interior		SUS304 Stainless Steel
Exterior		Electrostatic Spray Coating Finish Stainless Steel or Stainless Steel (SUS304)
Insulation		High Density Polyurethame Foam and Glass Wool
Systems
Control		Balanced Temperature/Humidity System
Controller		7-Inch LCD Touch-screen Panel (Chinese or English Language Modes) Operation Modes: Program or Setting Memory Capacity: 120 Programs, 1200 Steps Cycles: all repeat 999 cycles, part repeat 99 cycles Accuracy: Temp.: 0.1%of F.S±1 digit; Humidity: 0.1% of F.S±1 digit Input: Temperature PT100; Humidity PT100 or 5V DC Communication Port: RS-232 or RS-485
Refrigeration		Water Cooled Single-stage or Cascase Stage Refregiration System Semi-hermetic Compressor HFC Free Refrigerant (HFC-404 / HFC-23)
Safety and Configurations
Safety Devices (Standard)		No Fuse Breaker Compressor over Pressure/Heat/Current/Temperature Protection Fan Overload Protection Safety Fuse Dry Combustion Protector Water Shortage Protection
Standard Configurations		1 x Heatproof Oberservation Window 1 x Cable Port (portΦ50mm) 1 x Chamberlamp 1x Indicator Light