Environmental Chambers and Space Simulation Systems

Request a Quotation
KDR Burn-in and Stress Screening Literature Link

KDR Burn-in and Stress Screening Literature Link

Burn-in and Stress Screening Chambers

KDR4 Stress Screening Chamber

Supervise the operation of your product, electronic device, circuit board, or medical device while they are stress screened, burned-in, or temperature cycled inside a Bemco Kardburn or Koldburn glass front chamber. With a huge amount of testing or storage space within instant reach, KD Chambers provide a compact and attractive alternative to a walk-in chamber.

Glass door chambers were originally pioneered by Bemco over 25 years ago. Available in cart loaded, shelf loaded, relay rack mounted, and electronically fixtured versions, these chambers are still the standard by which all other glass door chambers are measured.

Often specified with optional power supplies or product exercising electronics, these systems are designated a model KDB Koldburn when optimized for stress screening, temperature cycling, or burn-in and a KDR Kardburn when circuit board card cages or card cage support rails are specified.

These chambers use specially fabricated temperature controlled heated frame doors with conductively heated multi-pane glass windows to allow individual bay access to items under test.

KDR Fixtured Bay

The exterior equipment and the control apparatus are neatly packaged in a sheet metal enclosure painted Bemco Blue or optionally from 300 Series stainless steel so that they can be flush mounted through a wall or aligned with a narrow walkway. The rear mounted vertical air duct is constructed so that a large number of optional penetrations can be installed in the rear wall for fixturing.

Similar in concept to the familiar reach-in cooler found in supermarkets, these chambers are much easier to load than a walk-in. The large glass doors help you watch your displays, lights, and switches while keeping track of test progress and observing potential problems before they become serious.

Kardburn and Koldburn chambers include a heliarc welded 304 Series stainless steel inner liner with high temperature fiberglass insulation. No asbestos is used. Duct-work and baffles are also fabricated from 300 Series stainless steel.

62.2" 28” 101” 100.5" 42"
92.7" 28” 101” 130.7" 42"
123.1" 28” 101” 161.1" 42"
153.6" 28” 101” 191.6" 42"
185.1" 28” 101” 223.1" 42"

Number of Workspace Bays
Interior Height
Interior Width
Interior Depth
Exterior Height
Exterior Width
Exterior Depth

KDR Table Notes:

KBR6 System Stress Screening Chamber

Each bay includes a high volume, non-sparking, aluminum blower drawing air through a large, bottom of bay mounted cooling coil and an electric air heating system. The blower discharges into a rear mounted duct that flows air up the back wall to a ceiling mounted diffuser.

The high volume air circulation system assures temperature uniformity over the items being tested and helps eliminate hot spots. An oversize shaft, dual ball bearing race, TEFC motor mounted outside the workspace on the chamber back wall drives the blower.

A proportionally controlled, water cooled refrigeration system utilizing modern, environmentally friendly refrigerants cools the workspace. This system is furnished as a packaged unit for remote mounting by your refrigeration contractor. Air cooled refrigeration systems and integrally mounted and enclosed refrigeration systems are also optionally available.

Fast response, low watt density open type heaters located behind a radiation baffle raise chamber temperature as required. The heaters are protected by a factory preset high temperature safety thermostat interlocked with a separate power interrupting contactor.

Safety Systems and Electrical Wiring

All systems have thermal and current sensors on the compressor, charging valves, and a sight glass as well as numerous safety and reliability protection systems for dependable operation. All electrical wiring meets the United States National Electric Code. UL and CSA approved components are used where possible.


The KDR Chamber includes a microprocessor based, programmable 1/4-DIN, solid state 256-step ramping controller with a 4-line LCD interface display, and a large red LED display. An RS232 and RS485 interface is standard. The protocol is Modbus™. LabVIEW™ drivers are available.

A Factory Mutual approved high and low temperature safety control with audible and visual alarm is optionally available.


Standard KDR chambers include a 1,500 cfm air circulation system in each bay. They heat from 0 C to 65 C in approximately 60 minutes when loaded with a test load equivalent to 115 pounds of aluminum per bay plus 3 shelves. They cool from 65 C to 0 C in approximately 30 minutes with 115 pounds of aluminum per bay plus 3 shelves, while the load dissipates 500 watts per bay while cooling.

A standard higher performance conditioning system (add -HC to the model number requested) has the same performance on cooling and heating as the base system with a load of 230 pounds of aluminum per bay plus 3 shelves, while the load dissipates 1000 watts per bay while cooling.

Custom conditioning systems with much faster heating and cooling rates and higher live load capabilities are available.

Temperature Control is + or - 1 C guaranteed, + or - 0.25 C typical.

Optional Accessories

Optional Instruments

Available instrument options include:

Available Literature Includes:

KDR Burn-in and Stress Screening Literature Link Bemco KD Series, Kardburn and Koldburn Glass Door Burn-in, Stress Screening, and Medical Storage Chambers. Six standard common bay KDR Glass Door Chambers, four standard KDZ individual bay Glass Door Chambers, one and two bay cart loaded chambers, and one to six bay KDM Medical Storage Chambers. Document is 8 pages, 668 KB download.

The systems described above are our Standard Models. We make custom equipment to your specifications.  If you have any questions, need assistance in preparing a specification, or have a technical problem you want help with, we are ready.  Our quotations and advice are free.

Back to the TopHome

Bemco Inc, 2255 Union Place, Simi Valley, California 93065, Telephone (805) 583-4970, Fax (805) 583-5033

"Conrad Missimer" and "PAO Chiller" found at http://www.paochiller.com are Divisions of Bemco Inc.
Kardburn, Koldburn, and Bemcoil are Trademarks of Bemco Inc. Bemco Web Site, © 2007 Bemco Inc.