Thermal Shock Chamber

Thermal shock chamber is used to test most commercial products to see how they withstand drastic temperature changes. Simply to say, A thermal shock chamber will subject a product to the most extreme temperature conditions, instantly.
The purpose of testing a product under these circumstances by the thermal shock test chamber is to observe changes in the products characteristics and check for failure occurrence of different materials and thermal expansion coefficients. This thermal shock chamber are prohibited to flammable explosive easily to volatile substances sample test or storage, corrosive substance sample test or storage, biological sample test or storage, strong electromagnetic emission source sample test or storage.

thermal shock chamber

Quality inspection for all types of electronic products, electric appliance, and products from communication, instrument, automobile, plastic, metal, food, chemical, building materials, medical and aerospace industries.

The Three-Box Type Thermal Shock Chamber (WE-TST-080-B) Related Features:
● Thermal shock chamber divided into three zones: High temperature zone, low temperature zone, and testing zone. The test sample is in static mode.
● Using touch-control graph control as operation interface, easy to operate.
● Use wind route conversation to shock way to distribute temperature to test zone for cold shock measurement.
● For high or low temperature shock, max. Time is up to 999H, and max. Circulation cycles are 9999 times.
● The system can be used for automatic Circulation Shock or manual selective shock.
● Can entering normal temperature. RS-232 and RS-485 communication.
● The thermal shock testing chamber adopt binary cooling system, with quick cooling effect. Cooling method is water cooling.



Model DescWE-TST-027-BWE-TST-050-BWE-TST-080-BWE-TST-150-B
Voluem Size27L50L80L150L
Interior Dimension (W×H×D)300*300*300mm360*350*400mm500*400*400mm600*500*500
Exterior Dimension (W×H×D)900*1670*1260mm1200*1750*1860mm1330*1800*1860mm1430*1900*2000mm
StructureTwo/Three ZonesTwo/Three ZonesTwo/Three ZonesTwo/Three Zones
Maximum Sound Level55 dBA60 dBA65 dBA65 dBA
Electric Current35A max55A max78A max120A max
Cooling SystemAir CoolingWater CoolingAir CoolingWater Cooling
Temperature Range-70°~200°C-70°~200°C-70°~200°C-70°~200°C
Temperature Fluctuation±0.5°C±1.0°C±1.0°C±2.0°C
Humidity Range40~95%RH40~95%RH40~95%RH40~95%RH
Preheating Temperature Limit200°C200°C200°C200°C
Heating Rate0°C~200°C/30 min0°C~200°C/30 min0°C~200°C/30 min0°C~200°C/30 min
Precooling Temperature Limit-70°C-70°C-70°C-70°C
Cooling Rate0°C~ -70°C/90 min0°C~ -70°C/90 min0°C~ -70°C/90 min0°C~ -70°C/90 min
Temperature Recovery TimeIn 10 minIn 10 minIn 10 minIn 10 min
Test Area Bearing50 Kgs50 Kgs50 Kgs80 Kgs
Shelf Bearing20 Kgs20 Kgs30 Kgs30 Kgs
Setting RangeTemperature: -100°C~200°CTIME:OHIM~999hCYCLE:0 ~9999
Output ModePID+SSR(control method)PID+SSR(control method)
Power supplyAC 220V, 230V50/ 60 HzAC 380V ±10%,50/ 60 Hz
Gross Weight350 Kgs475 Kgs650 Kgs950 Kgs

In fact, We have a customer request a more strictly liquid nitrogen cooling system design. This kind of thermal shock chamber with a highly technology inside of the chamber. There seldom Chinese environmental test chamber manufactures can produce it. But Wewon Environmental Chambers Co., Ltd. win this customer at last. The technical parameters for this Liquid Nitrogen with France Tecumseh Cooling Type Thermal Shock Chamber as below mentioned :

Overall Feature of the Thermal Shock Chamber:
Thermal Shock Chamber’s Type:Three cabinet version, Air to air vertical type thermal shock chamber.
Testing Type of thermal shock chamber:Time based thermal shock (Test specimen   dwells at each test space for   a definite  period of time defined by the respective dwell timer)
Cooling Method:Cooling by Refrigeration, and Cooling by Liquid Nitrogen (LN2) circulation/ injection.
Heating Method:Electrical Resistance Heaters.
Nominal Operating Temperature Range:
Hot Cabinet : ≤ +40º C  to ≥ +250º C
Ambient cabinet : ≤ +10º C  to ≥ +80º C
Cold cabinet : ≤ -65º C  to ≥ +60º C (Cooling by refrigeration) 
Cold cabinet :  ≤ -180º C to ≥ +60º C (Cooling by liquid nitrogen).
Temperature  Accuracy :  ± 1ºC, Wewon Environmental Chambers Co., Ltd. Copyrights
Test Specimen Load:3 kg Compact Stainless Steel.
Test Specimen Recovery Time :
≤ 5 minutes to cool from+150º C to -65º C (by refrigeration cooling in cold cabinet)
≤ 5 minutes to cool from+250º C to -180º C (by LN2 cooling in cold cabinet)
≤ 5 minutes to heat from -65º C to +150º C. (Heating in hot cabinet)
≤ 5 minutes to cool from +150º C to +25º C. (Cooling in ambient cabinet)
≤ 5 minutes to heat from    -65º C to +25º C. (Heating in ambient cabinet)
Basket Transfer Type: Electro mechanical elevator/ pneumatic piston.
Basket Displacement  Speed:  ≤  10  seconds  (without  jerks  &    mechanical shock
Basket Load Carrying Capacity: ≥25kg.
Number of Settable Test Cycles: 0 to 9999 cycles (operator re-settable).
Dwell Timers Set Range: 0 to 99 minutes with least count of seconds.
Cold Cabinet Gasket Heating: By diathermic oil circulation.


Electrical Features:
Wiring Comment:
All the wires shall be suitably numbered or labeled for easy identifications and documentation. The wires shall be strapped / bundled and routed through the ducts.
All electrical circuits shall have reliable safety devices like fuse or circuit breaker.
Power connection terminal block and ground lugs shall be provided for easy utility connections.
Complete wiring shall meet International Standard Code.
The electrical control system shall conform to industry standard and must facilitate the following:
Electric connections according to IEC specification
Smooth starting of electrical systems.
Electrical protection against load faults such as short circuit, overload etc.,
Electrical protection against supply faults such as single phasing, low voltage
And negative phase sequence.
Safety push button in case of emergency.
Three Phase Power Protections:
Single phasing protection.
Reverse phase protection (Phase sequencer protection).
Noise Level: Noise level of the chamber shall be less than 75 dB (A). (typically at 1 m distance from chamber).


Thermal Shock Chamber’s Construction:
Description:The chamber shall be of mono block structure construction, comprising three cabinets placed one above the other (Hot cabinet at top, ambient  cabinet at middle and cold cabinet at bottom).
Exterior:The exterior housing must be made from lightweight, self-supporting, corrosion resistant, galvanized steel-sheet of suitable thickness. The outside surface of the exterior wall shall be primed and painted to a standard finish with high quality materials.
Complete construction of the inner test spaces shall be made of Stainless steel
All the joints shall be continuous seam welded to form a hermetically sealed unit  in order to prevent external moisture migration.
The inner shell  shall have good suitable thickness and structural rigidity to withstand thermal induced thermal stress.
Inner wall shall be connected to external wall suitably.
Test Space:
Upper test cabinet shall be  hot cabinet and equipped with fan, heaters, temperature sensor, thermostat etc.,
Middle test cabinet shall be ambient cabinet and equipped with fan, heaters, evaporator, temperature sensor, thermostat etc.,
The lower test cabinet shall be cold cabinet and shall  equipped with fan, heaters, evaporator, temperature sensor, thermostat etc.,
All the fan motors shall be placed outside the test space with suitable protection.
If cooling by LN2 injection method an appropriately  sized port shall be provided at   the centre of the cold cabinet wall to vent the vaporized LN2 so as to avoid over pressurization in the test space.
Materials used in test space conditioning shall not generate any corrosive elements like sulphur, chlorine etc.,
Temperature sensor or any other items in the test cabinet shall not protrude into the usable test space volume of specimen carriage basket.
Insulation Description:
Suitable environmental friendly, low thermal conductivity, high density and non hygroscopic insulation material shall be provided between interior and exterior of the chamber and also between the test cabinets. Asbestos insulation or hazardous substance shall not be used. The thickness of the insulation shall be such that to ensure the following conditions:
The outer wall surface temperature of the cold cabinet shall be ≥ 20oC, when cold cabinet is maintained at -180o C in continuous operation.
The outer wall surface temperature of the hot cabinet shall be ≤ 35o C, when hot cabinet is maintained at +250oC in continues operation.
Test Specimen Carriage Basket:The chamber shall be provided with electrical driven actuator / pneumatic piston actuator to transfer  specimen  holding  carriage  (Basket)  between  the  test  cabinets.  Clear  basket dimension  shall be  ≥ 500mm (D) x  ≥500mm  (W) x ≥500mm (H). The basket shall be transferred vertically between the test cabinets in short duration (≤ 10 seconds) without jerk & mechanical shock after the lapse of the set time in each cabinet. The basket shall be made of stainless steel mesh to facilitate good air circulation.
Travelling Cable Port:The chamber shall be provided with travelling cable port at test specimen carriage basket for the usage of temperature sensors and signal wires external from the test package. Any part of the travelling cable port shall not protrude into the usable test space volume of the basket. Travelling port inside shall be Teflon sleeved and clear inside dia shall be ≥50mm.
Door Description:
The chamber shall have door at front side. The door shall be fully open able (180C or  more) to facilitate test article loading and unloading
Heaters  shall  be  provided  at  the  door  at  appropriate  place  to  avoid  moisture condensation on the outside surface.
Suitable numbers of locks / clamps shall be provided to ensure uniform pressure and air tightness of the chamber test space.
Window and Interior Lights:The chamber door shall have  multi-pane observation window of size ≥ 0.3m x 0.3m to view/inspect the  test specimen  in the ambient cabinet. The  test space  shall have  proper lighting for functional inspection.
Condensation Water Drain:A backpressure free automatic drain shall be provided at cold cabinet and ambient cabinet to remove humidity/condensation water.
Testing Standards:The chamber shall be designed to conduct thermal shock tests as per the international standards (MIL-STD, IEC, DIN, etc.) as applicable.
Run Time Meter:Run time counter shall be provided for recording the total running time in hours of the chamber
Thermal Shock Chamber’s Safety
Audio / Visual Alarm system on machine & computer for fault reporting.
Chamber protection during power failure, power surge, low power,  fluctuating power or power reversal.
Prevention of condensation on test specimen.
Fuse protection for mains and individual circuits.
Over temperature safety cut off thermostat with audio alarm.
Integral Fault Diagnostic system/Auto diagnosis program for safety with troubleshooting for equipment.
Auto/self adapting power control of cooling system.
High and low temperature protection for test specimen.
Door opening electrical switch control with chamber conditioning fan.
Test cabinet fan interlock for Heaters and Refrigeration.
Factory set high heat limit.
All electrical & electronics components should be CE marked components.
Safety interlocks to prevent basket transfer when chamber door is open.


Thermal Shock Chamber

Thermal Shock Chamber

Thermal Shock Chamber Conditioning System:
Heating System:
Heating shall be achieved by non-corrosive and long life electrical heaters.
Heaters shall be baffled from test space to prevent direct heat radiation on test Specimen.
Heaters shall be of easily removable type for maintenance / replacement activity.
Heating system shall have over temperature  protection  for test space  by power isolation.
Cooling system: Cooling shall be achieved by following two methods:
Cooling by Refrigeration system (To cool down -65º C).
Cooling by LN2 circulation/injection system (To cool down to -180ºC)
Refrigeration system shall include the followings:
Refrigeration system shall be two stage (High stage & Low stage) cascade type
High stage refrigeration system shall be charged with R404A refrigerant and low stage refrigeration system with R23 Refrigerant.
Compressors shall be of Scroll / Hermetic / Semi-hermetic type.
Condenser shall be of air cooled/water cooled.
Evaporator shall preferably have copper tubes and copper fins.
Refrigeration system shall be fitted with electrical & temperature protection, safety pressure switches etc.,
Compressor shall be placed on anti-vibration mounts (acoustic isolation).
Circulation/Injection system shall include the followings:
LN2 circulation/injection system shall have long stem solenoid valve, flow meter, pressure gauge, safety relief valve, etc., in the thermal circuit.
If cooling is by LN2 circulation method, the heat exchanger shall preferably have copper tubes and copper fins.
If cooling is by LN2 injection method,  the LN2 should be atomized thoroughly and only cold GN2 shall have contact with test specimen.
GN2 Purging System:All the three test cabinets shall be provided with GN2 purging provision.  Each test space shall be provided with one ½ inch NPT pipe connection (preferably) for GN2 purging.




thermal shock chamber'

Data Sheet (Thermal Shock Chamber)
POP Photo for Thermal Shock Chamber
Technical Parameters for Wewon’s Thermal Shock Chamber 1
Technical Parameters for Wewon’s Thermal Shock Chamber 2
Technical Parameters for Wewon’s Thermal Shock Chamber 3
LN2 Liquid Nitrogen Cooling System and Aluminum Plate for Rapidly Temperature Change Purpose
Mainly structure for Wewon’s thermal shock chambers, 2 zones, Mechanical Movement, Cylinder, Three Zones, Air to Air Recycle Blowing Solution
Main Product Lines Verification Report by Alibaba
The Temperature Humidity Sensor Spec for PT 100
Products Catalog
Company Profile 
Products Profiles



Wewon Environmental Chambers Co., Ltd. as a manufacturer and supply environmental test chambers climatic chambers for abroad partners many years ! The mainly product from Wewon Environmental Chambers Co., Ltd. are : temperature humidity chambers, walk-in chambers, thermal shock chambers, xenon test chambers, ozone test chambers and vibration test systems.


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