--- title: VTK On-Site Varnish Test Kits Specifications description: The VTK test kit contains everything you need to test including a laboratory grade Membrane Patch Colorimetric (MPC) test, wherever you need it. --- [![Donaldson Hy-Pro](https://www.hyprofiltration.com/hs-fs/hubfs/Donaldson%20Hy-Pro%20Logo_Blue.png?width=170&height=76&name=Donaldson%20Hy-Pro%20Logo_Blue.png) ![Donaldson Hy-Pro](https://www.hyprofiltration.com/hs-fs/hubfs/Donaldson%20Hy-Pro%20Logo_Blue.png?width=170&height=76&name=Donaldson%20Hy-Pro%20Logo_Blue.png) ](https://www.hyprofiltration.com?hsLang=en) [**](https://www.hyprofiltration.com/products/test-kits-and-equipment/vtk-specifications#tmpmodule_1710871496765239) [![Distributors](https://no-cache.hubspot.com/cta/default/170326/6a993b6f-f737-4a22-8a35-a45c4da5c3b4.png)](https://cta-redirect.hubspot.com/cta/redirect/170326/6a993b6f-f737-4a22-8a35-a45c4da5c3b4) [![eCatalog](https://no-cache.hubspot.com/cta/default/170326/4050f587-90b6-4151-8b5e-82d87ca58336.png)](https://cta-redirect.hubspot.com/cta/redirect/170326/4050f587-90b6-4151-8b5e-82d87ca58336) ** ## VTK On-Site Varnish Test Kits Condition monitoring is critical in staying ahead of lube oil degradation issues. Varnish Test Kits from Hy-Pro provide on-site access to laboratory grade Membrane Patch Colorimetric (MPC) testing as a key piece in predicting potential varnish problems before unit trip or fail-to-start conditions occur, all according to the world recognized ASTM D7843-12 standard for the measurement of insoluble oxidation by-products   [![Download Brochure](https://no-cache.hubspot.com/cta/default/170326/090faa2d-d933-4a0d-a804-fea37c133f00.png)](https://cta-redirect.hubspot.com/cta/redirect/170326/090faa2d-d933-4a0d-a804-fea37c133f00) Complete Varnish Test Kit Includes ![VTK Spectrophotometer](https://www.hyprofiltration.com/hs-fs/hubfs/VTK_.png?width=1800&name=VTK_.png "VTK Spectrophotometer") Spectrophotometer calibrated for MPC ∆E  ![VTK filter patches](https://www.hyprofiltration.com/hs-fs/hubfs/Hy-Pro%20Website%20Images/VTK/IMG_0011.jpg?width=197&name=IMG_0011.jpg "VTK filter patches") 45µ 47 mm membrane filter patches (100) ![VTK flask](https://www.hyprofiltration.com/hs-fs/hubfs/Hy-Pro%20Website%20Images/VTK/IMG_0005_2.jpg?width=93&name=IMG_0005_2.jpg "VTK flask") 125 ml glass mixing flask (for sample oil & solvent) ![VTK solvent dispenser](https://www.hyprofiltration.com/hs-fs/hubfs/Hy-Pro%20Website%20Images/VTK/IMG_0006_1.jpg?width=111&name=IMG_0006_1.jpg "VTK solvent dispenser")  Solvent dispenser with cap, squirt nozzle, and syringe filters (3) ![VTK vacuum pump hose ](https://www.hyprofiltration.com/hs-fs/hubfs/Hy-Pro%20Website%20Images/VTK/IMG_0010_1.jpg?width=258&name=IMG_0010_1.jpg "VTK vacuum pump hose ") Vacuum pump hose ![VTK bench piston vacuum pump ](https://www.hyprofiltration.com/hs-fs/hubfs/Hy-Pro%20Website%20Images/VTK/VTK_032814_082.jpg?width=107&name=VTK_032814_082.jpg "VTK bench piston vacuum pump ")  Bench piston vacuum pump (120V AC, 1P, 60 Hz) ![VTK glass filter funnel](https://www.hyprofiltration.com/hs-fs/hubfs/Hy-Pro%20Website%20Images/VTK/IMG_0008_2.jpg?width=69&name=IMG_0008_2.jpg "VTK glass filter funnel")  Glass filter funnel + filter holder top assembly ![VTK glass funnel flask ](https://www.hyprofiltration.com/hs-fs/hubfs/Hy-Pro%20Website%20Images/VTK/IMG_0007_1.jpg?width=107&name=IMG_0007_1.jpg "VTK glass funnel flask ")  Glass filter funnel flask with vacuum pump tube port ![VTK forceps](https://www.hyprofiltration.com/hs-fs/hubfs/Hy-Pro%20Website%20Images/VTK/IMG_0007_2.jpg?width=343&name=IMG_0007_2.jpg "VTK forceps") Forceps ![VTK instruction manual ](https://www.hyprofiltration.com/hs-fs/hubfs/Hy-Pro%20Website%20Images/VTK/IMG_0009_1.jpg?width=235&name=IMG_0009_1.jpg "VTK instruction manual ")  Instruction manual including details on patch preparation, spectrophotometer operation, sample result interpretation and solutions for lube oil varnish ## Have a Question for Donaldson Hy-Pro? [![Contact Us](https://no-cache.hubspot.com/cta/default/170326/82b6a151-2481-4e91-9cac-0d88a5679d18.png)](https://cta-redirect.hubspot.com/cta/redirect/170326/82b6a151-2481-4e91-9cac-0d88a5679d18) [**](https://www.linkedin.com/company/hy-pro-filtration) [**](https://www.youtube.com/c/hyprofiltration) [![Donaldson Hy-Pro Logo](https://www.hyprofiltration.com/hs-fs/hubfs/Hy-Pro%20Logos/Donaldson%20Hy-Pro%20Logo%202.png?width=130&height=58&name=Donaldson%20Hy-Pro%20Logo%202.png "Donaldson Hy-Pro Logo")](https://www.hyprofiltration.com?hsLang=en) Donaldson Hy-Pro 6810 Layton Road Anderson IN, 46011 | +1 (317) 849-3535 | info@hyprofiltration.com | All Rights Reserved 2026 ** [[fa icon="chevron-up"]](https://www.hyprofiltration.com/products/test-kits-and-equipment/vtk-specifications#)