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FD/HD Series

The FD/HD series is our standard floor-model temperature test chamber. FD chambers are temperature only, whereas HD chambers include a humidity system with a range of 10% to 98% +/- 2% RH. Available in a wide range of volumes, there is a test chamber to meet your environmental testing needs. The construction of the FD/HD series gives it the highest quality and the utmost reliability. Using AES' patented inner baffle design, FD/HD series environmental test chambers are capable of producing a temperature range from -65°C to +180°C (-85°F to +356°F) all while maintaining even and stable airflow. This airflow consistency allows for highly accurate environmental testing on your product. The FD/HD series environmental test chambers are also ideal for thermal cycling tests and can be outfitted with a liquid CO2 or LN2 to improve the functionality of the test chamber.

FD/HD Configurations:

  • FD - Temperature only
  • HD - Temperature and humidity capability

Available in two standard temperature ranges:

  • 500 Series ~ -37°C to +180°C (-35°F to +356°F)
  • 200 Series ~ -65°C to +180°C (-85°F to +356°F)



  AES|XChange-Operating and Data Management Dashboard

Dashboard view enables chamber control at the chamber, at a desktop, or remotely via laptop or tablet

Profile Builder has drag-and-drop, web-browser functionality

Data Logging with onboard, multi-year logging of live and current data, anyplace anytime

Communication and Control uses standard, well-documented JSON API for easy integration with other test platforms

Security decreases test interference with three authentication methods and six permission levels 

View all the benefits of AES|XCHANGE

Watlow F4T Programmable Controller

Features a 4.3” capacitive touchscreen minimizing the chance for error. Ethernet communication supported by AES|XCHANGE

View more controller options


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

View sensor options

Data Loggers

View additional data loggers


Safety Measures

We offer multiple types of safeties on our test chambers to help protect your product and your test chamber if anything malfunctions.

Heat Fuse: (Standard)

A heat fuse or thermal fuse, will interrupt the flow of electricity to the test chamber and shut it down if it reaches a certain temperature.

High Temperature Safety: (Standard)

A digital set temperature safety that will shut down the test chamber if it goes over a certain temperature.

High/Low Temperature Safety:

A digital set temperature safety that will shut down the test chamber if it goes over a certain temperature or below a certain temperature.


Optional Features:

  • Shelf Modification (placement, size, number)
  • LN2 Boost Cool
  • CO2 Boost Cool
  • Custom Porting Sizes
  • Dry Nitrogen Purge
  • Water Cooled Condenser
  • Self Contained Water Recirculating System (HD Only)
  • Water Demineralizer Cartridge System (HD Only)
  • Heater for Window
  • Noise Reduction Package
  • Desiccant Air Dryer (for lower RH Range)
  • Variable Speed Fan*

*Only available on 13 cubic foot models and up



A unique feature of an Associated Environmental Systems test chamber is the variable speed fan we use to control airflow in the chamber. The fan is a variable frequency drive, specifically an ACS310 by ABB, that is dedicated to optimize the variable torque operation of our fans. The speed of the fan can be controlled through a profile or with a control loop on the AES|ONE.

152mm(h) x 152mm(w) x 152mm(d)
6"(h) x 6"(w) x 6"(d)
Scale Guy