Hardness Testing


Water hardness measurement solutions.


Hardness testing determines calcium and magnesium levels in water. It's essential for treatment plants, industrial processes, and laboratory analysis. Accurate hardness measurement helps prevent scaling and optimize water quality.

LaMotte Calcium Hardness TesTabs®, Pack of 100, 6846A-J
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LaMotte Calcium Hardness TesTabs®, Pack of 100, 6846A-J
$26.45

Mfr. Part # LaMotte 6846A-J

Product # 707898

LaMotte Hardness Reagent 6, 30 mL, 4485-G
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LaMotte Hardness Reagent 6, 30 mL, 4485-G
$13.25

Mfr. Part # LAMOTTE 4485-G

Product # 707865

LaMotte Hardness Reagent 5, 30 mL, 4483-G
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LaMotte Hardness Reagent 5, 30 mL, 4483-G
$13.95

Mfr. Part # LAMOTTE 4483-G

Product # 707864

Hach 5 in 1 Water Quality Test Strips, 2755250
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Hach 5 in 1 Water Quality Test Strips, 2755250
$31.45

Mfr. Part # 2755250

Product # 701888

Core & Main Hardness Standard as CaCO3, 1000 ppm, 1 L
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Core & Main Hardness Standard as CaCO3, 1000 ppm, 1 L
$55.35

Mfr. Part # HA7670-Q

Product # 707040

Core & Main Hardness Standard as CaCO3, 1000 ppm, 500 mL
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Core & Main Hardness Standard as CaCO3, 1000 ppm, 500 mL
$37.65

Mfr. Part # HA7670-P

Product # 707039

Core & Main Hardness Standard as CaCO₃, 100 ppm, 1 L
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Core & Main Hardness Standard as CaCO₃, 100 ppm, 1 L
$48.25

Mfr. Part # HA7630-Q

Product # 707038

Core & Main Hardness Standard as CaCO3, 100 ppm, 500 mL
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Core & Main Hardness Standard as CaCO3, 100 ppm, 500 mL
$29.55

Mfr. Part # HA7630-P

Product # 707037

Hach Hardness (Total & Calcium) Test Kit, Model HAC-DT, 2063900
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Hach Hardness (Total & Calcium) Test Kit, Model HAC-DT, 2063900
$497.00

Mfr. Part # 2063900

Product # 701114

Hach Hardness (Total) Test Kit, Model HA-DT, 2063600
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Hach Hardness (Total) Test Kit, Model HA-DT, 2063600
$442.00

Mfr. Part # 2063600

Product # 701112

Hach Hardness (Total & Calcium) Test Kit, Model HA-4P MG-L, 145701
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Hach Hardness (Total & Calcium) Test Kit, Model HA-4P MG-L, 145701
$155.00

Mfr. Part # 145701

Product # 700757

Hach Hardness (Total & Calcium) Test Kit, Model HA-4P, 145700
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Hach Hardness (Total & Calcium) Test Kit, Model HA-4P, 145700
$155.00

Mfr. Part # 145700

Product # 700756

Hach Hardness (Total) Test Kit, Model 5-EP MG-L, 145401
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Hach Hardness (Total) Test Kit, Model 5-EP MG-L, 145401
$55.69

Mfr. Part # 145401

Product # 700755

Hach Total Hardness Test Strips 0-425 mg/L, 1000 tests, Individually Wrapped, 2793828
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Hach Total Hardness Test Strips 0-425 mg/L 1000 Tests Individually Wrapped 2793828
$508.00

Mfr. Part # 2793828

Product # 701920

Hach Total Hardness Test Strips, 0-425 mg/L, 250 tests, Individually Wrapped, 2793844
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Hach Total Hardness Test Strips 0-425 mg/L 250 Tests Individually Wrapped 2793844
$170.00

Mfr. Part # 2793844

Product # 701921

Hach EDTA, Disodum Salt (TitraVer® Hardness Reagent), ACS Grade, 500 g, 20434
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Hach EDTA Disodum Salt TitraVer Hardness Reagent ACS Grade 500 g 20434
$136.00

Mfr. Part # 20434

Product # 700586

Hach EDTA, Disodum Salt (TitraVer® Hardness Reagent), ACS Grade, 100 g, 20426
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Hach EDTA Disodum Salt TitraVer Hardness Reagent ACS Grade 100 g 20426
$58.50

Mfr. Part # 20426

Product # 700585

Hach Rochelle Salt Solution, 500 mL, 172549
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Hach Rochelle Salt Solution, 500 mL, 172549
$116.00

Mfr. Part # 172549

Product # 700772

Hach EDTA Digital Titrator Cartridge, 0.1428 M, 1496001
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Hach EDTA Digital Titrator Cartridge, 0.1428 M, 1496001
$34.19

Mfr. Part # 1496001

Product # 701070

Hach EDTA Digital Titrator Cartridge, 0.714 M, 1495901
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Hach EDTA Digital Titrator Cartridge, 0.714 M, 1495901
$34.19

Mfr. Part # 1495901

Product # 701069

Hach CDTA Digital Titrator Cartridge, 0.800 M, 1440301
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Hach CDTA Digital Titrator Cartridge, 0.800 M, 1440301
$30.65

Mfr. Part # 1440301

Product # 701024

Hach CDTA Digital Titrator Cartridge, 0.0800 M, 1440201
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Hach CDTA Digital Titrator Cartridge, 0.0800 M, 1440201
$33.99

Mfr. Part # 1440201

Product # 701023

Hach CDTA Disodium Magnesium Salt, 100 g, 1408026
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Hach CDTA Disodium Magnesium Salt, 100 g, 1408026
$290.00

Mfr. Part # 1408026

Product # 700949

Hach CDTA Disodium Magnesium Salt Powder Pillows, pk/100, 1408099
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Hach CDTA Disodium Magnesium Salt Powder Pillows, pk/100, 1408099
$66.15

Mfr. Part # 1408099

Product # 700950

Hach Eriochrome Black T, Practical Grade, 25 g, 13224
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Hach Eriochrome Black T, Practical Grade, 25 g, 13224
$57.79

Mfr. Part # 13224

Product # 700561

Hach Hardness Reagent Set, Calmagite Colorimetric, 2319900
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Hach Hardness Reagent Set, Calmagite Colorimetric, 2319900
$126.00

Mfr. Part # 2319900

Product # 701432

Hach Hardness Buffer Solution, Aminoethanol, 500 mL, 2311149
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Hach Hardness Buffer Solution, Aminoethanol, 500 mL, 2311149
$41.59

Mfr. Part # 2311149

Product # 701416

Hach Alkali Buffer, 3.0 N, 100 mL, 2307242
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Hach Alkali Buffer, 3.0 N, 100 mL, 2307242
$28.95

Mfr. Part # 2307242

Product # 701406

Hach HNB Lab Reagent Package, 2307300
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Hach HNB Lab Reagent Package, 2307300
$60.99

Mfr. Part # 2307300

Product # 701407

Hach HNB Dilution Solvent, 100 mL, 2305042
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Hach HNB Dilution Solvent, 100 mL, 2305042
$18.80

Mfr. Part # 2305042

Product # 701402

Hach Hardness (Total) Reagent Set, Digital Titrator, Full Range, 2272000
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Hach Hardness (Total) Reagent Set, Digital Titrator, Full Range, 2272000
$107.00

Mfr. Part # 2272000

Product # 701371

Hach Hardness (Calcium and Total) Reagent Set, Digital Titrator, 2272100
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Hach Hardness (Calcium & Total) Reagent Set Digital Titrator 2272100
$184.00

Mfr. Part # 2272100

Product # 701372

Hach Alkali Solution, 500 mL, 2241749
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Hach Alkali Solution, 500 mL, 2241749
$82.70

Mfr. Part # 2241749

Product # 701317

Hach Calcium/Magnesium Indicator Solution, 500 mL, 2241849
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Hach Calcium/Magnesium Indicator Solution, 500 mL, 2241849
$91.45

Mfr. Part # 2241849

Product # 701319

Hach EGTA Solution, 50 mL SCDB, 2229726
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Hach EGTA Solution, 50 mL SCDB, 2229726
$36.75

Mfr. Part # 2229726

Product # 701308

Hach Calmagite Solution, 0.003%, 4 L, 2230356
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Hach Calmagite Solution, 0.003%, 4 L, 2230356
$123.00

Mfr. Part # 2230356

Product # 701309

Hach UniVer® 3 Hardness Reagent, 28 g, 21320H
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Hach UniVer 3 Hardness Reagent 28 g 21320H
$21.65

Mfr. Part # 21320H

Product # 702691

Hach Magnesium TNTplus Vial Test, 0.5 - 50 mg/L Mg , 25 Tests, TNT849
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Hach Magnesium TNTplus Vial Test, 0.5 - 50 mg/L Mg, 25 Tests, TNT849
$120.00

Mfr. Part # TNT849

Product # 700168

Hach Hardness (ULR) Reagent Set, Bulk Solution, 2603101
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Hach Hardness (ULR) Reagent Set, Bulk Solution, 2603101
$1,281.00

Mfr. Part # 2603101

Product # 701728

Hach Hardness (ULR) Reagent Set, Solution Pillows, 2603100
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Hach Hardness (ULR) Reagent Set, Solution Pillows, 2603100
$434.00

Mfr. Part # 2603100

Product # 701727

Hach Chlorophosphonazo Indicator Solution Pillows for ULR Hardness, pk/100, 2589599
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Hach Chlorophosphonazo Indicator Solution Pillows for ULR Hardness, pk/100, 2589599
$402.00

Mfr. Part # 2589599

Product # 701717

Hach CDTA Titrant (HexaVer™), 0.02 N, 1 L, 74053
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Hach CDTA Titrant (HexaVer) 0.02 N 1 L 74053
$52.69

Mfr. Part # 74053

Product # 700672

Hach CDTA Titrant (HexaVer™), 0.02 N, 4 L, 74056
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Hach CDTA Titrant (HexaVer) 0.02 N 4 L 74056
$101.00

Mfr. Part # 74056

Product # 700673

Hach Hardness (Calcium & Total Sequential) LR Reagent Set, Digital Titrator, 2448600
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Hach Hardness (Calcium & Total Sequential) LR Reagent Set, Digital Titrator, 2448600
$164.00

Mfr. Part # 2448600

Product # 701606

Hach Hardness (Calcium & Total Sequential) HR Reagent Set, Digital Titrator, 2448700
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Hach Hardness (Calcium & Total Sequential) HR Reagent Set, Digital Titrator, 2448700
$146.00

Mfr. Part # 2448700

Product # 701607

Hach Hardness Reagent Set (Calcium & Total), Buret, 0-2500 mg/L CaCO₃, 2448200
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Hach Hardness Reagent Set (Calcium & Total), Buret, 0-2500 mg/L CaCO₃, 2448200
$165.00

Mfr. Part # 2448200

Product # 701605

Hach Hardness (Total) Reagent Set, HR, Digital Titrator, 2448100
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Hach Hardness (Total) Reagent Set, HR, Digital Titrator, 2448100
$79.39

Mfr. Part # 2448100

Product # 701604

Hach Hardness (Total) Reagent Set, LR, Digital Titrator, 2448000
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Hach Hardness (Total) Reagent Set, LR, Digital Titrator, 2448000
$79.39

Mfr. Part # 2448000

Product # 701603