How expensive is the UV flashlight but then you can buy the syringe alone and it lasts a lot depending on the route or meters of the circuit's spout.
The economic solution is to look for the tutorials on youtube that teach you how to make UV flashlights, buy yellow lenses at the hardware store and only buy the syringe in replacement refrigeration houses.
Hi Nachito: Sorry to differ with the use of these products, but they often cover the capillaries, this type of products is not designed for these equipment only for air or automotive cooling, so it is my negative vote. Because such products are NOT used for equipment such as the one in the consultation. It is not to argue and I do it with respect. Thank you
I recommended the product because I used it in equipment with R410a without problems and at the end of the procedure I perform a scan to avoid leaving product residue or obstructions. Another device that also comes the gas leak detector by probe. I also leave link https://articulo.mercadolibre.com.ar/MLA-663513622-detector-de-fuga-de-gas-refrigerante-wjl-6000-r-410-r-22-_JM