Thermal Shock Chambers, Thermal Shock Chamber


	CERTIFIED Refurbished Thermal Shock Chambers Thermal Shock Chambers are used for “temperature shocking” a product under test. Usually a Thermal Shock Chamber consists of two chambers, one hot and another cold, with a test basket (which contains the product being tested) which moves between the two chambers (or zones) – either horizontally for vertically, depending on the configuration of the thermal shock chamber. LRE has all types of Thermal Shock Chambers available, CERTIFIED REFURBISHED and sold with a 100% Money Back Warranty. Once refurbished, these chambers look almost like, and operate, like new. Originally Thermal Shock Chambers were used for testing military products such as semiconductors, IC’s and circuit boards. However, nowadays most commercial products are also tested for rapid temperature change rates, and Thermal Shock Chambers are ideal for this application. Most Thermal Shock Chambers consist of two zones, but when an ambient condition needs to be included, three zone systems are also available. Another type of Thermal Shock Chamber is a double duty style - this includes two test baskets instead of one. This increases the efficiency of the thermal shock chamber providing more test product throughput. Thermal Shock chambers can be cooled using mechanical refrigeration or LN2/CO2 or a combination of both. Each has advantages and disadvantages as follows: Advantages of using LN2/CO2 for cooling: Faster ramp-down temperature rates than standard mechanically Thermal Shock Chambers (however, this can be improved with larger mechanical refrigerated compressors). Faster temperature changes can reduce total test time.
		Temperature testing that would have taken hours to perform can be completed much faster. Also, faster temperature ramp-down rates can propagate failures in the product being tested. Lower initial cost of the Thermal Shock Chamber itself, since they do not require mechanical refrigeration compressors (which add to the price). The main disadvantages of CO2 or LN2 Thermal Shock Chambers are: A Liquid CO2 or LN2 source is required – This could be a portable storage dewar (tank) that can be located near the Thermal Shock Chamber or a larger bulk storage tank installed outside the building where the Thermal Shock Chamber will be used – The latter option requires that insulated LN2 or CO2 lines to be run between the Thermal Shock Chamber and the bulk storage tank (often an expensive installation depending on length of the run). It’s possible to displace or dilute the room’s oxygen and create an unsafe environment for workers around the Thermal Shock Chamber. This condition is called Oxygen Deficiency Hazard (ODH) and every LN2 or CO2 application must be evaluated with this concern in mind. Normally this is only an issue with larger Thermal Shock Chambers – Please discuss with our sales engineers who will provide more information if required. Even though CO2 or LN2 chambers are less expensive than mechanically Thermal Shock Chambers, they could become more costly to operate over time as CO2 or LN2 is consumed, depending on the test being performed. For the best type of Thermal Shock Chamber for your application, please ask our sales engineers for

CERTIFIED Refurbished Thermal Shock Chambers