Kalpak Instruments & Controls manufactures Vacuum Based Micro Leak Testing Machine. Kalpak Instruments & Controls offers a wide range of electronic test and measuring instrumentation for various industrial applications. The Vacuum Based Micro Leak Testing Machine of model MELD-2000 is Pressure Decay type programmable Leak Tester capable of easy and accurate volume Leak testing using dry air as source. The Vacuum Based Micro Leak Testing Machine is based on the principle that any pressure charged component if leaky, will exhibit negative pressure difference with reference to time.