Walk-in Environmental Test Chamber & Environmental Control Chamber Manufacturers India

WALK IN ENVIRONMENT TEST CHAMBER/ENVIRONMENTAL CONTROL CHAMBER

Some testing cannot be done at a bench. When the specimen is large, the batch is massive, or the researcher needs to be inside the environment alongside the experiment, only a walk-in environmental test chamber will do. At ACMAS Technologies Pvt. Ltd. (WEIBER brand), we design and build walk-in environmental test chambers and environmental control chambers that create any climate, on demand, at any scale, and we build them exactly to your specifications. Not off a shelf. Not from a standard catalogue. To your requirements, your standards, your dimensions, and your budget.

What Is a Walk-in Environmental Test Chamber, and Who Needs One?

A walk-in environmental test chamber is a room-sized controlled environment unit that simulates precise combinations of temperature, humidity, and light, allowing researchers and technicians to physically enter the chamber and work with specimens directly. Unlike benchtop models, a walk-in chamber is designed for applications where specimen size, experiment volume, or operational complexity makes a smaller unit impractical.

They are used whenever the testing environment must match the scale of the work: automotive component arrays, large electronic assemblies, whole-rack telecommunications equipment, tissue culture trays by the hundred, or industrial material batches that would take months to process in standard chambers. An environmental control chamber of this scale is not simply a bigger box, it is a climate-controlled laboratory that your entire team can work inside.

Why Laboratories & QA Teams Choose ACMAS–WEIBER Environmental Control Chambers

Procurement managers and laboratory directors evaluating environmental control chamber manufacturers ask the same questions: will it perform to specification, will it last, and will someone answer the phone when something goes wrong. Here is why ACMAS–WEIBER answers yes to all three:

HMI+PLC integrated controller, 1.6 GHz processor, 256MB RAM, 7" or 10" colour touch panel: one unified interface for all parameters, eliminating operator error from juggling separate controllers
Variable-speed circulation fans with coaxial design, better temperature and humidity uniformity across the full chamber volume, not just near sensors
Pre-attached data logger with data analysis software, automatic 24-hour data capture, graph and table outputs, directly publication-ready
Open and close door alerts via mobile network, real-time chamber status from anywhere, anytime
Self-calibrating system, continuously monitors and recalibrates without operator intervention
Air-cooled refrigeration with CFC-free compressors (Kirloskar / Tecumseh / Bitzer / Danfoss), low fan power consumption, corrosion-resistant, long-life operation
Heated viewing window with automatic defogging, observe your specimens without opening the chamber
CE and ISO certified, documentation your quality system and international customers accept without question

Our walk-in environmental test chambers are installed in automotive research facilities, aerospace test organisations, telecommunications equipment labs, defence establishments, tissue culture facilities, agricultural research institutions, and universities across India and in more than 50 countries internationally.

Our walk-in environmental test chambers and environmental control chambers are designed to perform tests in accordance with the international standards. Custom standard configurations are available on request.

IEC 60749-25
IEC 60068-2-14
IEC 61747-5
JESD22-A105-B
IPC 9701
ASTM D5116-10
ASTM D4565-15
BS EN 60068-3-11:2007
BS EN 60068-3-7:2002
IEC 60068-3-7:2001
ASTM D6670-13
Customer defined.

HMI+PLC based controllers.
Colored touch screen panel.
Data logging facility with data analysis software.
USB ports.
Open and close door updates through mobile network.
RS 232/485 connectivity.
In built printer for printing graphs.
Over and under temperature specimen protection
Viewing window with automatic defogging.
Temperature and humidity controlled by microprocessor based system.
CFC FREE REFRIGERATION UNIT
Less use of Electrical and Mechanical Components on the Top and Bottom of Chamber - Provides easy maintenance of chamber, increases durability because of proper air circulation; cooling systems kept at bottom of the chamber to provide proper environment for compressor.
Heated Vewing Window - Heated viewing window allows viewing fog generated and proper viewing of the test sample.
Circulation Fan with Variable Speed -
- Electrical efficiency
  Variable speed motor saves money by reducing energy bills, as it consumes less electricity than conventional motor.
- Cooling Efficiency
  Variable speed enables gaining air conditioning efficiency or SEER.
- Air Quality
  Variable speed motor helps clean the air efficiently. When the fan is in constant operation (indicated by the "Fan" setting on thermostat), the motor continues to slowly circulate air, allowing filters to capture more contaminants.
- Humidity Control
  Variable speed motor combined with a Thermostat allows controlling the amount of humidity.
- Quieter Operation
  Variable speed blower motor are significantly quieter thanits single-speed counterpart.
Air Cooled Refrigerated System - Air cooled refrigeration system offer various benefits like
- low fan power consumption
- resistant to corrosion and freezing conditions
- requires very low maintenance
- Guaranteed long life operation
PCRC Sheet Body - Powder coated steel body assures corrosion resistant chamber and allows working of chamber at high temperature applications.
Digital Output – Target and Performance Output of the chamber operations are in digital format(digits) giving precise reading.
Pre - Attached Data Logger with Data Analysis Software - Primary benefits of using data loggers is to automatically collect data 24-hour basis.Graph and table format of results can be produced automatically by the data logging software.
Self-calibration system- WEIBER incorporate a self-calibration system, in each chamber,that is completely automatic to prevent errors that could result from failure to calibrate. The system continuously monitors the environment, sensing changes that could affect analysis, and re-calibrates accordingly using a built-in long-life calibrator The process takes just a few seconds, without operator intervention or additional supplies, quickly optimizing system parameters for the current conditions.
Open and Close Updates Through Mobile Network - Mobile technology has the potential to make services more flexible and keep informed, information anywhere at any time from mobile device, and can set alert system to know whether or not the chamber is being used.
Reliable – Construction, performance mechanism, controls and information system integration makes the equipment reliable.
Precise Control of Environmental Parameters - The set/ programmable parameters of the chamber are precise or have less deviation from original value,thus ensuring correct measurement.
Micro - Processor Based Controller – Microprocessor based controller enablesprecise control of temperature, humidity, pressure and other values. Benefits:
- Processing speed is high
- Provides flexibility to alter the system by changing software.
- Compact in size.
- Operation and maintenance easier.
- Maintain precise values
Aesthetically designed - Designed according to the standards and principles underlining industry’s aesthetic values.
Corrosion Resistant interior and exteriors - Corrosion resistant coatings like epoy coatings are applied inside and outside the chamber to prevent against degradation due to moisture, salt spray, oxidation or exposure to a variety of environmental or industrial chemicals/ corrosive agents.
Energy Efficient – WEIBER chamber uses less energy to provide the same level of performance, comfort and convenience, thus making it energy conserving chamber.
CFC - free cooling - The air cooled refrigerator use CFC (chlorofluorocarbon)-free refrigerants those are ozone friendly and eco-friendly.
Sturdy Construction - WEIBER chambers are built with robustness to withstand stress and strain, giving the chamber long life and ability to perform in extreme stress environments.
Low Maintenance - WEIBER systems benefit inretaining proper functionality over long period of time.
Light Weight: Compact and superior materials ensure the chamber be light weight

The test condition (temperature and humidity) are controlled by air-jacket control system. Control is governed by the 32 Bit I/O system with integrated soft PLC. A web server can place test and diagnosis information in the intranet via Ethernet if desired.

The principle of the test is to determine the effects of different environmental parameters such as humidity, temperature applications tests involving micro-organisms, plants, tissues, electronic components etc. apart from various customized industrial and research applications.

The input temperature and humidity is given through Nano technology based hmi and plc, and the results are observed. By setting the temperature and humidity conditions, operation is automatically controlled.

There are 2 modes of testing:

Select the "Normal Mode “for frequently changing temperature and humidity conditions and flexible adjustments to rapid changes in the heat load generated by the sample.
The "Power Saving Mode" keeps power consumption down for constant operation. Select either mode depending on testing circumstances.

WEIBER environment test chambers are double walled convection heated and cooled units. Outer body of our environmental chambers are constructed out of thick PCRC, pre coated corrosion resistant GI sheet duly pre-treated with primers and rust proofing and painted with long lasting stove enamel or elegantly powder coated. The inner chamber is made of heavy gauge stainless steel sheet of SS-304 grade). The gap between the walls is filled high grade mineral glass wool, which ensures maximum thermal efficiency in our chambers.

The unit is provided with double door opening (single door can be added on request). This door is provided with magnetic door closer. This door is provided with lock and key arrangement. The triple walled back of our Temperature and Humidity Control Test chambers are provided with two/Four/Six/Eight (size specific) air circulation fans for uniform maintenance of the temperature throughout the chamber.

HMI+ PLC IN ONE UNIT:

Weiber provides better automatic controls for the chamber by integrating HMI and PLC together. This special feature is compelling alternative to traditional methods and provides a simplified, reduced cost control system architecture.
It works by following operating steps:

Sensors measure the physical quantity like temperature and convert them to electrical signal
The actuation device acts upon that electrical signal
At HMI interface between operator and chamber occurs.
The machine operates with the logic design controls controlled by software.
This signal is sent to the chamber by logic control devices and the chamber operates.

Basic features of HMI+PLC:

Processor of 1.6 GHz: High clock speed processing PLC that enables speed up processing to the functions. With 1.6GHz processing speed, the PLC system is capable of multitasking, processing of large data volume, and high performance.
Audio Output Alarm: Audio alarm alertin case of failures in any of the component controlling functions.
256 MB of RAM: PLC of 256Mega Byte memory for running programmes offers high memory space for installing of more programs
COM Port: Com port provided for attaching RS 235/RS 485 cable.

USB Ports: A USB port provided for transferring data through communication between HMI and PLC. Various peripherals can be connected via USB hub.
Coloured Touch Panel: We provide coloured touch panel screen available in 2 sizes -7 inches and 10inches, displaying all the control features, digital clock, sensor layouts, data and values, graphics and pictures, navigations etc.
RS232 or RS485 Interface: Serial interface provided to get connectivity with internet, mobile and other data transmission. Single device to device interface and a communication bus that is used to form simple networks of multiple devices are available through RS485 interface. RS485 interface supports transmission speed of 2400, 4800, 9600, 19200, 38400 bits per second.
Through Ethernet communication module, AC Drives, temperature controller and other industrial automation products can be connected quickly.
Touch Screen Size of 7 Inches and 10 Inches: HMI screen available in 2 sizes- 7inches and 10inches, as per user’s requirement. Screen displays the control features, images, data values and other programs.
Expandable Memory with a SD Card: SD card plugged in appropriate slot for more memory requirement that will be read and used as part of device; for long storage requirements SD card may be added and store data with expanded memory.

High Resolution Brilliant TFT Displays, 64k Colours: HMI screen displays 64000 different colours with good resolution, allowing large number of distinguished colours, easy to establish and work with. It shows entire new 2D drawing technique, the screen resolution enhanced for more realistic images and more colourful and vivid displays.

Software Supports All Six IEC 61131 Programming Languages: Software supports all the six programming languages under international standard IEC 61131: Function Block Diagram, Ladder Diagram, Structured Text, Sequential Function Chart, Instruction List, and Continuous Function Chart.
E-remote Control Software: E-remote enables viewing the monitor and same screen shown on HMI at the production site, and control the manufacturing process via Ethernet.

A set of Trouble Shooting Tools: 3 troubleshooting tools provided with in the software
Simulation- Imitation of a situation as real situation
Debugging- Finding and reducing number of defects.
Online changes- Like change of IP address can be made online. Manual to operate the programs on request.

Increased Numbers of On - Board I/O peripherals (10-50): Maximum number of 50 I/O peripherals provided on request, to attach input and output devices to the HMI and PLC. Increased number of input and output peripherals allows adding of devices like printers, recorders, etc.,as per the need.

Data Logging and Free Pprogramming Software: Attached data logger with input program software provided. Through data logging software, HMI and PLC collect datathrough sensors, analyse the data and save and output the results of the collection and analysis. Examples of the types of information a data logging system can collect include temperatures, sound frequencies, vibrations, times, light intensities, electrical currents, pressure and changes in states of matter.

CoDeSys (Controller Development System) software technology

controller development System screenshot complex ir chamber

Heating:
Indirect heating system is provided in our units, comprising of air heaters made of high grade Kanthal A-1 wires of suitable wattage. The warm air is evenly distributed throughout the chamber through efficient motor fans ensuring very good temperature sensitivity.

Cooling:
An energy efficient cooling unit is installed in our photostabilitytest chambers to enable studies at lower room temperatures. We use high end CFC free compressors of Kirloskar/Tecumseh / Bitzer/ Denfos make, conforming to latest international standards and guidelines.

DETAILED DESCRIPTION ALONG WITH SALIENT FEATURES ARE AS UNDER FOR REFRIGERATION MACHINE

CONDENSING UNIT

AIR-COOLED CONDENSOR

Air-cooled condenser is internally grooved finned copper tubes used for high heat transfer area, which not only reduce power consumption, but also bring down the condensation faster. This unit is designed. &verdigris& reduces the resistance, saves energy consumption and ensure good heat exchange.

COMPRESSOR:

HERMETIC COMPRESSOR
Single stage Reciprocating Compressor. Give the High Efficiency compared to sealed compressors, Less Power Consumption , Accessible for repairing, low noise level, Less Vibrations, Wide Voltage Range, Designed for Extremely High Ambient ,Full warranty etc
COOLING SYSTEM
The compressor is mounted perfectly to ensure recommended level of sound and vibration.

REFRIGERATION CONTROL

Low and High Pressure switch of RANCO/Danfoss

Which ensures the compressor and refrigeration system when low pressure will occurs it trip off the compressor. This is the only operator friendly switch can easily reset.
Hand Shut off Valve
Is the only Condensing Unit, which is equipped with it. This valve is used for pump down the total gas in to the condenser & receiver in the faulty condition.
Liquid Dryer of Danfoss make
Which is equipped in the liquid line for ministration of moisture in the liquid. It will collect all the moisture in side the refrigeration line as well as gas.
Moisture Indicator of Danfoss make
The sight glass area in the Moisture Indicator shows at a glance the condition of the refrigerant system. The moisture indicator element changes colour and indicate if the system is safely dry, or dangerously wet.
Solenoid Valve of Castle make
In most refrigeration applications, in order to automatically control the flow of fluids in a system, it is necessary to be able to start or stop the flow in the refrigerant circuit. An electrically operated solenoid valve is usually used for this purpose. Its basic function is the same as a manually operated shutoff valve, but it can be positioned in remote locations, and may be conveniently controlled by simple electrical switches.
Oil Separator of Stainless Steel 304

The oil separator intercepts the oil mixed with compressed gas and returns it into the crankcase of the compressor, thus assuring an efficient lubrication of its moving parts. Also, it improves the overall efficiency in the system.
Suction Accumulator
Maximum Efficiency of the relief device (expansion valve) because it is supplied with sub cooled Liquid.
Liquid Receiver
As per ASME Section VIII Division I for storage of refrigerant.

Humidity Range
10% to 95%RH

Humidification (WATER TANK AND AEROSOL SYSTEM)

A low-pressure droplet free vapor boiler using direct vaporization system is used. Water Reservoir is provided at the side of the chamber with a 10 x 8mm PU tube quick connector and water level is automatically controlled through a water-in solenoid valve. The wick tank water level is automatically maintained through a water solenoid valve and an electrical float switch. The de-mineralized water or single distilled water supply to the humidity inlet having a resistance measurement of approximately 50,000 – 200,000 Ohm/cm is provided with the unit
Aerosol Generator and Monitor is a multi-function aerosol instrument comprised of an atomizer aerosol generator. As an aerosol generator can be used to generate a monodisperse aerosol by atomization. The output aerosol concentration is continuously monitored by control facility to provide a stable aerosol output with a known particle size and a known aerosol concentration from 10nm to1000nm.

Dehumidification: Refrigeration based de-humidification system is used. The desired level of lower humidity will be achieved by maintaining the precise dew point temperature. If you need more low humidity than the standard range then refrigeration based dehumidification system can be incorporated on customer’s request.
Humidity Sensitivity: Humidity is controlled by mean of an electronic humidity controller cum indicator with an accuracy of ±3%RH
Temperature Control: The temperature inside our temperature and humidity controltest chambers is controlled through Nano technology based HMI & PLC controller.
Temperature Range: Temperature range of our standard Chamber is -40°C to +90°C. . However we have the capacity to modify the same to suit the individual specialized requirements of our customers.
Temperature Sensitivity: Temperature inside our Temperature And Humidity Control test chambers are controlled with a sensitivity of + 1 o C or better.
Illumination: OurTemperature and Humidity Control test chambersare provided with door operated illumination system comprising of fluorescent lights, beside two panels of diffused fluorescent light panel located at the either side of the chamber to enable the user to conduct the photo periodic tests and experiments.
Insulation: The gap of 75 mm between the outer and the inner wall is filled with special grade glass wool to prevent thermal losses.
Mineral Glass Wool Insulation: Glass mineral wool is one of the most environmentally friendly, stable and sustainable insulates available. Glass wool is incombustible by nature. Euro class classification is A. It does not propagate flames and toxic smokes. Thanks to a dense entanglement of materials with a low conduction and trapping a great amount of air, glass wool is an excellent thermal insulant. The thickest it is, the best thermal resistance it has, thus reducing heat losses in our equipment’s for better sensitivity and economical operations. And its impact on the environment in manufacture, use and disposal is minimal.
Air Circulation: Triple walled back of unit is fitted with two air circulation fans for maintaining temperature uniformly throughout the chamber

Features of Coaxial Circulation Fan:

Vacuum impregnated stator winding with dr. back varnish under red baktol
Non-hygroscopic.
Best IR value
Bright bar (EN - 8 class) shaft.
Bush bearing of branded companies.
Surge comparison testing in fans and pumps eliminates into turn short circulating of the stator.
Pressure die-casted-rotor manufactured with zero error.
Boats of high accuracy

Port Hole:Port Holes with silicon enclosure is provided at back side of the chamber (50mm dia). Through the port hole you can input sensors, wires and other test equipment. Silicone foam plugs have excellent temperature and humidity resistance and offer very good thermal insulation Generally a single port hole is given but more numbers ca be increased according to customers request.

Working sizes

Volume (Lt.)	External dimensions (WXDXH)mm
4200	*179021102305*
8100	*274021002305*
12500	*379021002305*

Customizable sizes are also available

Power Requirements	220/230V, 50/60Hz
Electricity	1 phase or 3 phase as requested
Temperature Range	-40° C to +90° C (adjustable)
Temperature Fluctuation	±0.1°C
Temperature uniformity	±2°C
Ramp up rate	1°C/min
Temperature pull down rate	0.33°C/min
Humidity	10 to 95%RH
Humidity Deviation	±3%RH
Humidity uniformity	±5%RH
Temperature Sensor	PT-100
Port hole (single)	50 mm dia (more port holes can be attached on request)
Temperature Controller	HMI+PLC
Display	LCD
Safety thermostats
Automatic temperature setting	Yes
Adjustable limits	Yes

Basic humidity graph

Test houses and research.
Automotive industry
Electronics industry
Aviation and space industries
Plastic processing industries
Clothing industry, manufactures of sports articles
Chemical industry
Paints and coatings
Agricultural research
Bio related products.

Fully Customised to Your Specifications, Our Custom Engineering Capability

Every walk-in environmental test chamber we build at ACMAS–WEIBER starts with your specification document, not with ours. We do not configure a standard model and call it customised, we design from your requirements up. If you have a test standard to meet, a specimen with unusual dimensions, a laboratory with specific footprint constraints, or an R&D protocol that no standard chamber can satisfy, we will build what you need.

What we customise:

Temperature range: extend below -40°C or above +90°C as required
Chamber dimensions: any footprint from 1,800L to 20,000L and beyond
Humidity profile: modify the 10–95% RH standard range for specialist applications
Ramp rates: faster or slower temperature transitions to match your test protocol
Lighting: photoperiod programmes, UV capability, specific wavelength requirements
Test ports: number, diameter, and placement to your cable and instrument pass-through needs
Power supply: single-phase or three-phase, 220/230V or 380V, 50Hz or 60Hz
Standards compliance: configure for specific IEC, ASTM, BS, MIL-STD, or OEM test protocols
Data connectivity: RS-232/RS-485, Ethernet, USB, or custom SCADA integration

To request a custom configuration, share your technical specification sheet or describe your test requirements, we will design and quote within 5 working days.

Walk-in Environmental Test Chamber Suppliers & Exporters, India and Worldwide

As established walk-in environmental test chamber suppliers and manufacturers, ACMAS-WEIBER serves R&D laboratories, quality assurance departments, and testing organisations across India and internationally, including the Middle East, Europe, Germany, Japan, Southeast Asia, Africa, and the United States.

Within India, our environmental control chambers are installed in leading automotive OEM facilities, DRDO and defence research establishments, CSIR and ICAR institutes, agricultural universities, leading pharmaceutical companies, and tier-1 electronics manufacturers. For international orders, all chambers are CE-certified, shipped with export-compliant packaging and multilingual technical documentation, and supported by remote commissioning assistance.

Whether you need a standard configuration or a fully custom-engineered walk-in environmental test chamber built to your exact specification, our technical and sales teams are ready for a direct conversation. No pressure, no upselling. Just honest engineering guidance to help you specify the right chamber for your work.

Frequently Asked Questions:

Q: What is a walk-in environmental test chamber?

A: A walk-in environmental test chamber is a large-format, room-sized unit that simulates temperature, humidity, and light for testing products and materials at scale. It allows researchers to physically enter the chamber and work with specimens, accommodating large or bulk test loads that standard benchtop chambers cannot.

Q: What is the difference between a walk-in environmental test chamber and an environmental control chamber?

A: Both terms refer to the same category. An environmental control chamber describes the precision climate control aspect; a walk-in environmental test chamber describes the room-entry configuration. ACMAS–WEIBER units function as both.

Q: What temperature and humidity range does your walk-in environmental test chamber support?

A: Standard range is -40°C to +90°C with ±0.1°C fluctuation and ±2°C uniformity. Humidity: 10% to 95% RH with ±3% RH deviation. Custom ranges available on request.

Q: Can walk-in environmental test chambers be customised to my specifications?

A: Yes, this is ACMAS–WEIBER's core strength. We customise temperature range, chamber dimensions, humidity profile, ramp rates, lighting, test port configuration, power supply, and standards compliance. Share your technical specification and we will design and quote within 5 working days.

Q: What sizes are available?

A: Standard: 4200L (1790×2110×2305mm), 8100L (2740×2100×2305mm), and 12500L (3790×2100×2305mm). Custom sizes from 1800L to 20000L and beyond.

Q: What standards do your chambers comply with?

A: IEC 60749-25, IEC 60068-2-14, IEC 61747-5, JESD22-A105-B, IPC 9701, ASTM D5116-10, ASTM D4565-15, ASTM D6670-13, BS EN 60068-3-11:2007, BS EN 60068-3-7:2002, IEC 60068-3-7:2001, and customer-defined specifications.

Q: Do you export these chambers outside India?

A: Yes. We export to the Middle East, Europe, Southeast Asia, Africa, Japan, and the United States. CE-certified equipment with export-compliant packaging and international technical support.

Walk-in Environmental Test Chamber & Environmental Control Chamber Manufacturers, Suppliers & Exporters in India

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