Tif hld 440 halogen freon leak detector HDL440 tif

Tif hld 440 halogen freon leak detector HDL440 tif

TIF HLD halogen detector, includes original case, operating instruction, and several extra tips that looks like springs. Unit turns on, and emits a steady tone, not a beeping tone, but just one steady tone. I tried to adjust for sensitivity, without effects. I do not know if I was doing this right. This is the extent of my test. In cosmetically acceptable appearance, as pictured.
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