Hanna Instruments TDS 1 Water Tester 0-999 PPM C1
Has some marks on it.
Hanna DiST 5 / 6 EC/TDS/Temp Tester 0-3999 µS/cm & 2000 ppm HI98312 HI98311
Tester was only turned on to test after purchasing.
HI99301 Portable High Range EC/TDS Meter EXP 11/2027
HI99301 Portable High Range EC/TDS Meter EXP 11/2027