Electrical Conductivity / High Voltage Leak Detection (HVLD)
The electrical conductivity leak test, also called high voltage leak detection (HVLD), or “the spark test”, is an approach for detecting leak presence and potentially the location of a leak(s) in the wall of a nonporous package, rigid or flexible, containing liquid product.
The principle of high voltage leak detection is based on quantitative electrical conductance measurements. The presence of a leak path in the proximity of electrically conductive liquid results in a drop in test sample electrical resistance, as evidenced by a spike in current above a predetermined pass/fail limit. This highly sensitive method even works to detect package defects clogged by product formulation proteins or salts. Stability studies by clients have supported the use of this technology for nondestructive leak testing a variety of product formulation types. This should be considered, however, on a product-by-product basis.
Package systems that may be tested by HVLD include parenteral vials, pre-filled cartridges and syringes, plastic containers, and plastic bags or pouches.
Whitehouse Laboratories operates a “Container Testing Center of Excellence”. The entire business unit brings multiple levels of experience to each container testing program. Staff members with specific areas of expertise are always available to consult on your testing needs.