Safe to clean Hanna cuvetts in ultra sonic cleaner?

[warriorcookie]

I don't see why not. Many labs use heated ultrasonic cleaners with a mild detergent or acid such as HCL or HNO3 for their glassware.

I usually rinse in RODI immediately after each test. Every 5 to 10 tests or so I use Isopropyl Alcohol followed by a soak in DI. Alkaline detergents can etch the glass if left too long, whereas Isopropyl Alcohol is acidic and completely safe. Also, if there's a residue left it separates out from salt water.