What probe do you trust more?

[parrot_coral]

The Hanna benchtop refractometer, used for years. I once didn’t believe my either three probes, so I bought the TM Hydrometer, and the Hanna refractometer’s number is still completely the same with TM

 

[Reef Jedi]

The Hanna benchtop refractometer, used for years. I once didn’t believe my either three probes, so I bought the TM Hydrometer, and the Hanna refractometer’s number is still completely the same with TM

Is that have the same accuracy as the Hanna pen?

 

[parrot_coral]

Is that have the same accuracy as the Hanna pen?

The accuracy of ppt/psu are 1, SG is 0.001. But I believe the read stability and reliability is more important.