Qualmark
- Manufactures test chambers for temperature and vibration. (Nasdaq: QMRK).
- http://www.qualmark.com/

Enterprise
- Manufacturers of environmental test chambers, climatic chambers, -85°C freezers, industrial cold plants, space simulators; for electrical or electronics testing.
- http://www.angelantoni.it/

Thermaxx, Inc.
- Specializes in the service and repair of environmental test chambers.
- http://www.thermaxx.com

Sun Electronic Systems
- Manufactures desktop ate which include temperature test chambers, cycling chambers, environmental chambers, process and temperature controllers, and temperature calibrators.
- http://www.sunelectronics.com/

Temptronic Environmental Test Chambers
- Chambers and fixtures for a wide variety of applications in semiconductor, automotive, communications, aerospace, military defense, fiber optic, rf microwave, medical and critical materials.
- http://www.temptronic.com

Tenney Environmental Test Chambers
- Benchtop chambers, thermal shock chambers, thermal cycling chambers, burn in chambers, altitude chambers, vacuum ovens, vibration, temperature humidity cycling, laboratory chambers
- http://www.tenney.com