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Low Temperature Test Chamber

TTLT Series of Low Temperature Test chamber are widely used in testing various types of materials for their tolerances of heat and cold. It is designed for quality inspection for all types of electronic products, electric appliance, and products from communication, instruction, automobile, plastic, metal, food, 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.

TTLT Series is able to simulate a wide range of temperature environments, that temperatures ranging from -86°C to +90°C. Torontech can also offer you best solutions based on your own requirements.

Test Area

  • Cabinet made of high quality SUS304 stainless steel
  • Test hole(φ50mm, φ125mm) sealed with silicone screw plug
  • PT100 platinum temperature sensor
  • 2 pieces of adjustable and removable shelves

Air Circulation

  • 3 air circulations fans
  • The real panel of test area equipped with chip-type wind board, air flowing out from top of wind board and return into air inlet to achieve air circulation.

Cooling System

  • Mechanical compression refrigeration system
  • 2 cascade compressor
  • Environment friendly refrigerant R404a for first stage, R23 for the second stage

Control Panel

  • PLC controller
  • Programmable color display touch screen controller.
  • 999 groups/sections programs
  • RS-232 /RS-485 interface, PC Link, LAN network

Viewing Window

  • Interior lights
  • Window coated with conducting film to protect operator
  • Size: 250 × 300mm


  • Over temperature protection and water shortage protection
  • Humidifier dry combustion protection and refrigerant high pressure protection
  • Over current protection
  • Earth leakage protection


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2.Sample Shelf

3.Cable Hole

The internal material is 304 stainless steel, mirror surface, rust-proof to high and low temperature and moisture corrosion;

Nice ruggedness and long life.

SUS304 stainless steel punching sample shelf 2pcs;

Standard load of 50KGS for each layer of sample shelf;

The height of the shelf is adjustable and can be removed directly to facilitate the various sizes of test samples.

Conducive to the air circulation.

A standard test hole, located at the left side of the work room, is provided with a sleeve inside to prevent moisture from entering the insulation layer. Equipped with flange.

The standard inner hole diameter is 50mm.

Soft silicone plug seal; Metal enclosure closed, beautiful designed.

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4.Viewing Window



Double layer insulating glass 8cm thick, made of tempered glass.

The conductive film is located on the interior glass to prevent window frosting, built-in LED light for the work room lighting ;can clearly observe samples.

The light control button is located below the controller.

PID programmable color touch screen controller, network connection computer.

Can edit 100 programs 100 segment.

LIB also can preset program into the controller based on user testing requirements.

The set system language is English for standard.

Install 4 castors for easily moving, and with brakes function. Caster height is adjustable

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Core Function

Cooling System


After the liquid refrigerant absorbs the heat of the cooled object in the evaporator, it is vaporized into low-temperature and low-pressure steam, sucked by the compressor, compressed into high-pressure high-temperature steam, discharged into the condenser, and radiated to the cooling medium in the condenser, condensed into a high-pressure liquid, throttling through a throttle valve into a low-pressure low-temperature refrigerant, and again entering the evaporator to absorb heat and vaporize, to achieve the purpose of cycle refrigeration.

In this way, the refrigerant completes a refrigeration cycle through four basic processes of evaporation, compression, condensation, and throttling in the system.

Air Circulation

The centrifugal fan is installed at the rear of the chamber body, and the air is uniformly distributed through the air outlet. Air circulation adopts air outlet at top and air return at bottom, and the wind speed and pressure are in compliance with the test standard, and the temperature is stabilized at the moment of switching. The high-quality centrifugal fan is used to strongly supply air circulation, making the temperature distribution in the test area uniform

Controller System