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FD-201 Environmental Testing Chamber
Illustration of man next to FD-201 for scale
Illustration of man next to FD-201 for scale
FD-201 Environmental Testing Chamber
Illustration of man next to FD-201 for scale
Illustration of man next to FD-201 for scale


FloorRack and Stack

TUVRheinland icon Benchtop Stackable icon

FD-201 Model is a floor-style temperature-only environmental test chamber. 

STRUCTURE.  The internal workspace is lined with type 304 stainless steel for a vapor-tight internal construction. The exterior has a durable powder-coat finish over heavy-gauge steel for a long-lasting clean look. Between the two layers is highly-efficient, low k-factor, thermal insulation. This chamber is built to last for many years.

CIRCULATION SYSTEM.  Air circulation is crucial for environmental testing. The FD-201 Test Chamber has a proprietary baffle and fan design combination. This optimizes temperature conditions within the workspace. 

HEATING SYSTEM.  FD test chambers feature heating systems equipped with open ceramic-core nichrome heaters for reliable and accurate temperature control within ±0.5°C.

COOLING SYSTEM.  The cooling system in the FD-205 consists of a self-contained mechanical refrigeration system with a cascade configuration, and an air-cooling condenser. An optional water cooling-condenser is available. 

Add boost cooling with liquid LN2 or CO2 for even faster pull-down rates. It's a great option for stress tests that require rapid cooling.  Even without boost cooling, AES’ standard cascade refrigeration systems have the fastest standard change rates of any environmental test chamber manufacturer. See Basic Specifications tab below. 

INSTRUMENTATION.  FD Series Test Chambers have incorporated the AESONE CONNECT creating a robust connected device for a standard and uniform interface making operation easier. Learn more in the Instrumentation Tab below.


  • FD-501 -37°C to +180°C (-35°F to +356°F)


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  • Specifications
  • Standard Features
  • Instrumentation
  • Safety Features
  • Optional Features
  • Downloads


Scaled Image of FD-201
Interior: 13.5W x 16D x 9H (in)
  342.9W x 406.4D x 228.6H (mm)
Exterior: 19.5W x 32D x 41H (in)
  495.3W x 812.8D x 1041.4H (mm)
Volume: 1.125 cubic ft
  31.86 liters
Temperature: -70°C to 180°C (-94°F to 356°F)
Rise Rate*: 3.88°C/minute
Pull Down Rate*: 1.5°C/minute
Electrical Supply:  120VAC, 1PH, 50HZ or 60HZ,
Full Load Amps: 28A
Power Requirement: NEMA L5-30
Mobility: Will fit through 32" door

*Rise and pull-down rates calculated using IEC 60068-3-5 standard. Custom options available.


  • Interior Cabinet: Stainless Steel, Type 304
  • Exterior Cabinet: Cold Rolled Steel, Heavy-Gauge, Powder Coat finish, Color: Bone
  • 8 x 8 in. Multipane Viewing Window Heated Window (Standard on -65°C Models Only)
  • Internal Light with External Switch Port Configuration: Left
  • Wall Access Port and Plug with 3 in. (76.2mm) Diameter
  • Locking Swivel Casters, set of 4




FD Series Test Chambers have incorporated AESONE CONNECT creating a robust connected device for a standard and uniform interface making test chamber operation easier.

AESONE XCHANGE  is hardware that lives inside your chamber's electrical system to increase your functionalityaesone-connect-1

  • connects your test chamber controller (Watlow F4T)  to your network for increased accessibility
  • on-board storage with multi-year data logging holding up to eight years of data

AESONE CONSOLE is software accessed by an IP address on your company network giving you the power to

  • turn-on, operate, and monitor your test chamber remotely
  • create multiple web-based test profiles with a simple drag-and-drop taskbar and setting pop-ups so you don't miss an event
  • viewing current data and historical data visually while the DUT profile is still being executed
  • multi-level authentication types and secure multi-level user access allowing the right access for all of your team


WATLOW F4T PROGRAMMABLE CONTROLLER. Features a 4.3” capacitive touchscreen minimizing the chance for error. Ethernet communication supported by AESONE HARDWARE. View more controller specifications and options

SENSORS. 100 OHM Platinum RTD  is a highly-accurate sensor made from platinum components for increased sensitivity View sensor options

OPTIONAL DATA LOGGERS. View additional data loggers

Safety Features

  • Adjustable Digital Set Limit Controller Indicating High-Temperature Safety
  • Over Temperature Heat Fusing
  • Refrigeration System Over Pressure Safety Circuit
  • TUV Rheinland Certified Meeting UL 61010-1, US, C, E

Optional Features

  • Shelf Modification (placement, size, number)
  • Custom Porting Sizes
  • Custom window size
  • Noise Reduction Package
  • LN2 Boost Cool
  • CO2 Boost Cool
  • Desiccant Air Dryer to ensure conditions as low as 5% RH
  • Dry Nitrogen Purge to keep condensation and frost from accumulating on DUT surfaces at cold temperatures and to prevent oxidation of metals surfaces at high temperatures