Spacechina

During the past twelve months, several third-party testing bodies and OEM laboratories reported the same problem: when running dust tests in accordance with GB/T 4208, IEC 60529 or MIL-STD-810, the batch cycle has stretched from 48 h to 72 h, even 96 h, while energy consumption has risen by more than 30 %.

The sand and dust test chamber is used to evaluate the dust resistance of objects in sandy and dusty environments. Currently, this equipment is widely applied across various fields. Today, we will focus on its application in the military industry.

Dust testing, codified in GB/T 2423.37 and IEC 60068-2-68, is now mandatory for proving the sealing integrity and reliability of military, automotive, photovoltaic and rail-transit products. Direct test outlays—consumables, energy, labour and depreciation—seldom exceed one to three per cent of the selling price, yet hidden expenses triggered by poor chamber selection—repeat tests, invalid data or after-sales downtime—can leap to eight to twelve per cent.

From the outside, a high and low temperature test chamber may appear to be just a large box. However, its internal structure is not as simple as it seems.

The thermal shock test chamber is a cornerstone of environmental-reliability testing. Within tens of seconds it transfers specimens between extreme high- and low-temperature zones, revealing mechanical stress, electrical degradation, and chemical instability induced by rapid thermal expansion and contraction.