Hardness Standard25 TO 49.99 - 75 TO 99.99 - 100 TO 199.99
1
Thermo Scientific Orion Water Hardness Standard, 100 ppm CaCO3, 475 mL, 923206.
Item No.21782 Call for availability
Price $136
each
2
Hach APA High Range Hardness Standard 1, 1L, 2793253.
Item No.204433 Call for availability
Price $79.95
each
3
USABlueBook® Hardness Standard, 100 ppm as CaCO3, 500 mL.
Item No.29625 Call for availability
Price $37.65
each
4
USABlueBook® Hardness Standard, 1000 ppm as CaCO3, 500 mL.
Item No.29627 Call for availability
Price $37.65
each