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Benchtop Environmental Chamber

Benchtop Environmental Chamber is able to simulate a wide range of temperature and humidity environments, that temperatures ranging from -86°C to +150°C and humidity range from 20% to 98% RH. Torontech can also offer you the best solutions based on your own requirements.


Benchtop Environmental Chamber is widely used in testing various types of materials for their tolerances of heat, cold, dry and humidity. It is designed for quality inspection for all types of electronic products, electric appliance, and products from communication, instruction, automobile, plastic, metal, food, and chemical, building materials, medical and aerospace industries. Unique design with high-quality material, whether you’re testing aerospace products, electronic instrumentation, materials, electrical and electronic products and various electronic components, our High low alternating temperature and humidity test chamber can give you a perfect solution.

Test Area

  • Material of the test cabinet is high quality SUS304 stainless steel.
  • Test hole, sealed with silicone screw plug.
  • Temperature sensor Pt100 platinum
  • Humidity sensor dry and wet bulb
  • 2 pieces of adjustable and removable shelves

Air Circulation

  • Air circulation fans in the workroom of the chamber.
  • The real wall of test area equipped with chip-type wind board. Air flowing from top of wind board which control air direction return to air inlet to achieve air circulation.

Cooling System

  • Mechanical compression refrigeration system
  • Refrigerating unit is French TECUMSEH compressor.
  • Two cascade compressor
  • Environment friendly refrigerant R404a for first stage,
  • R23 for the second stage

Humidity System

  • External isolation, stainless steel surface evaporation humidifier
  • Automatic water supply

Control Panel

  • PLC controller
  • Programmable color display touch screen controller.
  • Programs reach to 999 groups and 999 sections
  • RS-232 interface, PC Link, LAN network

Safety Protection

  • Over temperature protection
  • Water shortage protection
  • Humidifier dry combustion protection
  • Refrigerant high pressure protection
  • Over current protection
  • Earth leakage protection




Interior Volume



Heat load


Temperature Range

A: -20°C ~ +150°C

B: -40°C ~ +150°C

C: -70°C ~ +150°C

Temperature Fluctuation

± 0.5°C

Temperature Deviation

± 2.0°C

Humidity Range

20% ~ 98% RH

Humidity Deviation

± 2.5% RH

Cooling Rate

1°C / min

Heating Rate

3°C / min


Cooling system

Mechanical compression refrigeration system

Refrigerating unit

French TECUMSEH compressor


R404A, R23

Heating Element

Nichrome heater


Programmable color LCD touch screen controller

Ethernet connection, PC Link



External isolation, stainless steel surface evaporation humidifier




Temperature Sensor

PTR Platinum Resistance PT100 Ω/MV A-class, accuracy 0.001Ω

Humidity Sensor

Dry and wet bulb sensor

Build-in Water Tank(mm)


View Window Size(mm)


Air Circulation

Centrifugal wind fan

Safety Device Safety Device

Humidifier Dry-combustion protection; Over-temperature Protection; Over-current Protection;

Refrigerant High-pressure protection; Water Shortage Protection; Earth leakage Protection

Exterior Material

Steel Plate with protective coating

Interior Material

SUS304 stainless steel

Thermal Insulation

Polyurethane foam and insulation cotton

Observation Window

Interior lighting, double-layer thermo stability silicone rubber sealing

Power Supply

220V 50Hz / 380V 50Hz (other voltage with transformer option)

Maximum Noise

65 dBA

Environmental Conditional

5°C ~ +35°C   ≤85% RH


Low temperature can cool down to -86°C.

The Refrigerant can be replaced by R449A/R508B.

The heat load can absorb 1000W in -20°C.

Standard & customized

* pay attention to the environmental condition during installing