The main box is shaped by CNC machine, the modeling is pleasing and nice, and operated by no-reaction handle. It is easy to use.

The interior of the box uses the material of imported stainless steel plate of mirror surface (SUS304) or 304B, and weld them by argon arc. The outside of the box uses A3 plastic coating plate.

It uses microcomputer temperature and humidity controller which can control the temperature and humidity precise and accurate.

Large observation window with light make the box bright and the use of double-glass make the customer have a clear observation at any time.

It has an independent temperature-limitative alarm system. Once higher than the limiting temperature, it will stop to work automatically in order to keep the safety running.

The customer can choose the record machine according to their own demand; the printer can print the record set parameter and scan the change curve of the temperature and the humidity, 4-20mA standard signal.

There is a DIA 50MM test hole at the left of the box.

Meet the standard

GB/T2423.1-2001 GB/T2423.2-2001 GB/T2423.3-1993

ITEM NO DHS-100 DHS-225 DHS-500 DHS-010  DHS-013
Size of studio D*W*H 450*450*500  500*600*750  800*700*900   1000*1000*1000 1000*1000*1300
Temperature range	0℃--100℃
Humidity range	30-98% R.H
Fluctuations/uniformity	≤±0.5℃/≤±2℃
Humidity deviation	+2, -3% R.H
Heating time	0℃--100℃ about 35min
Cooling time	100℃---0℃ about 40min
Controller: imported Microcomputer Integrated temperature and humidity controller
Precision range   set precision: temperature±0.1℃  instructed precision: temperature±1% R.H humidity: ±1% R.H
Temperature and humidity sensor	platonic resistance PT100 /MV
Heating system: all independent systems, Ni-Cr alloy, heating heaters
Add humidity system: External insulate style, evaporation in stainless steel surface type Add humidity machine
Dehumidification system: evaporator coil contacts dew-point temperature Dehumidification  way laminar
Water supply system: automatically control to add humidity and supply water
And can recover the waste water to cut down expense
Cooling system: all :closed one way /multi ways wind-cooled Compression refrigeration
(brand: “TAI KANG” from France)
Cycling system: high temperature resistance, low noisy air conditioning motor
multi-leaf centrifugal wind round
Material of outside box: carbon steel plate of good quality, which is deal with electrostatic phosphate powder-coating，SUS304 stainless steel plate with veins in the surface
Material of inside box:SUS304 stainless plate with mirror surface of good quality
Material of heat preservation	polyurethane foaming     glass fiber cotton
Heat insulation doorframe: double high, low temperature-resistance, anti-aging rubber sealing bar
Standard configuration	glass vision window for lighting(1set)
Sample rack 2pcs  1 test holes (25, 50,100mm)
Safety protections: have memory in situation of Leakage, short-circuit
over-temperature of the electric machinery and lack of water
Also have memory when Over-current/voltage of compressor happens.
Power supply voltage:AC380V±10% 50±0.5HZ three-phase five-wire system
Temperature of the environment	5℃--+30℃≤85% R.H
P.S    1 “DHS”is the pattern symbol of low temperature constant temperature and humidity test chamber.         2,  All the data are taken in condition of 25℃(QT) and the working studio has no load         3, We can make nonstandard low temperature constant temperature and humidity test chamber according to the demand of the customer.