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Browse a wide selection of high-quality lab equipment including spectrophotometers, turbidimeters, and colorimeters for measuring parameters such as pH, turbidity, chlorine, dissolved oxygen, fluoride, ammonia and many others. We carry everything you need to ensure your testing lab is in compliance with water quality regulatory standards.

Alkalinity Testing

Alkalinity Testing

Chlorine Testing

Chlorine Testing

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Colorimeters & Spectrophotometers

Conductivity, Salinity & TDS Testing

Conductivity, Salinity & TDS Testing

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Lead & Heavy Metals Testing

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Microbiological Testing

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Multiparameter Testing

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Oxygen Testing (Including BOD & COD)

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Phosphates & Phosphorus Testing

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645 - 736 of 2306 Products

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Most Popular

Price High to Low

Price Low to High

Core & Main Chloride Standard, 100ppm as Cl⁻, 500 mL

Core & Main Chloride Standard, 100ppm as Cl⁻, 500 mL

Mfr Part # CH7310-P

Product # 706966

$31.50

Core & Main Sodium Thiosulfate, 0.00564N, 4 L

Core & Main Sodium Thiosulfate, 0.00564N, 4 L

Mfr Part # ST2701-G

Product # 707258

$172.45

Core & Main Sodium Thiosulfate, 1.0N, 1 L

Core & Main Sodium Thiosulfate, 1.0N, 1 L

Mfr Part # ST2965-Q

Product # 707269

$25.90

Core & Main Calcium Chloride, 2.75% w/v, 500 mL (former C&M PN 707327)

Core & Main Calcium Chloride, 2.75% w/v, 500 mL (former C&M PN 707327)

Mfr Part # CC7500-P

Product # 706961

$18.25

Core & Main Conductivity Standard, 500 µS/cm, 4 L

Core & Main Conductivity Standard, 500 µS/cm, 4 L

Mfr Part # CS0500-G

Product # 706853

$64.45

Core & Main Potassium Chloride, 3M, 500 mL

Core & Main Potassium Chloride, 3M, 500 mL

Mfr Part # PC3000-P

Product # 706994

$22.45

Core & Main Starch Indicator Solution, 2.0% w/v, 500 mL

Core & Main Starch Indicator Solution, 2.0% w/v, 500 mL

Mfr Part # ST5025-P

Product # 707277

$34.00

Core & Main Acetate Buffer Solution, pH 4, 1 L

Core & Main Acetate Buffer Solution, pH 4, 1 L

Mfr Part # AB4150-Q

Product # 706882

$37.75

Core & Main Conductivity Standard, 5000 µS/cm , 1 L

Core & Main Conductivity Standard, 5000 µS/cm , 1 L

Mfr Part # CS5000-Q

Product # 706859

$36.30

Core & Main Starch Indicator Solution, 0.5% w/v, 500 mL

Core & Main Starch Indicator Solution, 0.5% w/v, 500 mL

Mfr Part # ST5005-P

Product # 707272

$14.60

Core & Main Chloride Standard, 1000ppm as Cl⁻, 500 mL

Core & Main Chloride Standard, 1000ppm as Cl⁻, 500 mL

Mfr Part # CH7360-P

Product # 706968

$31.60

Core & Main Ammonium Chloride Solution, 0.1M, 1 L

Core & Main Ammonium Chloride Solution, 0.1M, 1 L

Mfr Part # AC8300-Q

Product # 706927

$84.65

Core & Main pH Buffer Solution, pH 4.00, Red, 20 L Cubitainer

Core & Main pH Buffer Solution, pH 4.00, Red, 20 L Cubitainer

Mfr Part # BU5004-T

Product # 707129

$126.95

Core & Main Ammonium Acetate Buffer Solution, APHA for Iron, 1 L

Core & Main Ammonium Acetate Buffer Solution, APHA for Iron, 1 L

Mfr Part # AA8810-Q

Product # 706925

$61.45

Core & Main Chlorine Standard, 100ppm as Cl₂, 1 L

Core & Main Chlorine Standard, 100ppm as Cl₂, 1 L

Mfr Part # CH9200-Q

Product # 706971

$37.65

Core & Main pH Buffer Solution, pH 9.18, Colorless, 500 mL

Core & Main pH Buffer Solution, pH 9.18, Colorless, 500 mL

Mfr Part # BU5918-P

Product # 707142

$17.80

Core & Main Bromcresol Green Indicator Solution, 0.1% w/v, 120 mL

Core & Main Bromcresol Green Indicator Solution, 0.1% w/v, 120 mL

Mfr Part # BG4135-C

Product # 706949

$15.50

Core & Main SPADN Reagent Solution, 1 L

Core & Main SPADN Reagent Solution, 1 L

Mfr Part # SP4400-Q

Product # 707271

$45.40

Core & Main pH Buffer Solution, pH 4.0, Colorless, 500 mL

Core & Main pH Buffer Solution, pH 4.0, Colorless, 500 mL

Mfr Part # BU9504-P

Product # 707130

$17.80

Core & Main pH Buffer Solution, pH 6.86, Colorless, 500 mL

Core & Main pH Buffer Solution, pH 6.86, Colorless, 500 mL

Mfr Part # BU5686-P

Product # 707132

$16.90

Core & Main Sodium Chloride, 0.141N, 500 mL

Core & Main Sodium Chloride, 0.141N, 500 mL

Mfr Part # SC3800-P

Product # 707223

$38.10

Core & Main Ammonia Standard, 5ppm as N, 1 L

Core & Main Ammonia Standard, 5ppm as N, 1 L

Mfr Part # AS1005-Q

Product # 706912

$74.60

Core & Main Chloride Standard, 100ppm as Cl⁻, 1 L

Core & Main Chloride Standard, 100ppm as Cl⁻, 1 L

Mfr Part # CH7310-Q

Product # 706967

$46.95

Core & Main Boric Acid Solution, 2% w/v w/ Indicator, 1 L

Core & Main Boric Acid Solution, 2% w/v w/ Indicator, 1 L

Mfr Part # BA3000-Q

Product # 706948

$29.00

Core & Main Silver Nitrate, 0.141N, 500 mL

Core & Main Silver Nitrate, 0.141N, 500 mL

Mfr Part # SN3420-P

Product # 707208

$68.55

Core & Main Ammonia Standard, 2ppm as N, 500 mL

Core & Main Ammonia Standard, 2ppm as N, 500 mL

Mfr Part # AS1002-P

Product # 706907

$34.00

Core & Main Ammonium Acetate Buffer Solution, APHA for Iron, 500 mL

Core & Main Ammonium Acetate Buffer Solution, APHA for Iron, 500 mL

Mfr Part # AA8810-P

Product # 706924

$38.65

Core & Main Acetate Buffer Solution, pH 4, 4 L

Core & Main Acetate Buffer Solution, pH 4, 4 L

Mfr Part # AB4150-G

Product # 706883

$112.60

Core & Main pH Buffer Solution, pH 2.00, Colorless, 500 mL

Core & Main pH Buffer Solution, pH 2.00, Colorless, 500 mL

Mfr Part # BU5002-P

Product # 707124

$17.80

Core & Main Zero Oxygen Standard, 120 mL

Core & Main Zero Oxygen Standard, 120 mL

Mfr Part # ZE4175-C

Product # 707316

$13.50

Core & Main pH Buffer Solution, pH 6.86, Colorless, 4 L

Core & Main pH Buffer Solution, pH 6.86, Colorless, 4 L

Mfr Part # BU5686-G

Product # 707133

$69.90

Core & Main pH Buffer Solution, pH 10.00, Colorless, 4 L

Core & Main pH Buffer Solution, pH 10.00, Colorless, 4 L

Mfr Part # BU9510-G

Product # 707149

$69.90

Core & Main pH Buffer Solution, pH 2.00, Colorless, 4 L

Core & Main pH Buffer Solution, pH 2.00, Colorless, 4 L

Mfr Part # BU5002-G

Product # 707125

$69.90

Core & Main Ammonia Standard, 30ppm as N, 1 L

Core & Main Ammonia Standard, 30ppm as N, 1 L

Mfr Part # AS1030-Q

Product # 706918

$50.95

Core & Main Sodium Thiosulfate, 1.0N, 500 mL

Core & Main Sodium Thiosulfate, 1.0N, 500 mL

Mfr Part # ST2965-P

Product # 707268

$19.85

Core & Main Borate Buffer Solution, 1 L

Core & Main Borate Buffer Solution, 1 L

Mfr Part # BB6585-Q

Product # 706945

$36.20

Core & Main Starch Indicator Solution, 0.5% w/v, 4 L

Core & Main Starch Indicator Solution, 0.5% w/v, 4 L

Mfr Part # ST5005-G

Product # 707274

$72.75

Core & Main Ammonia Standard, 3ppm as N, 1 L

Core & Main Ammonia Standard, 3ppm as N, 1 L

Mfr Part # AS1003-Q

Product # 706910

$62.95

Core & Main TISAB II, 20 L

Core & Main TISAB II, 20 L

Mfr Part # TS3000-T

Product # 707309

$722.50

Core & Main Ammonia Standard, 50ppm as N, 500 mL

Core & Main Ammonia Standard, 50ppm as N, 500 mL

Mfr Part # AS1050-P

Product # 706919

$34.00

Core & Main Alkaline-Iodide Azide Reagent, 500 mL

Core & Main Alkaline-Iodide Azide Reagent, 500 mL

Mfr Part # AI4205-P

Product # 706893

$46.20

Core & Main Ammonia Standard, 0.2 ppm as N, 500 mL

Core & Main Ammonia Standard, 0.2 ppm as N, 500 mL

Mfr Part # AS1202-P

Product # 706903

$34.00

Core & Main Potassium Acid Phthalate, ACS Grade, 500 g

Core & Main Potassium Acid Phthalate, ACS Grade, 500 g

Mfr Part # PA3000-K

Product # 707178

$145.95

Core & Main Starch Indicator Solution, 1.0% w/v, 500 mL

Core & Main Starch Indicator Solution, 1.0% w/v, 500 mL

Mfr Part # ST5010-P

Product # 707275

$18.65

Core & Main Ammonia Standard, 1000ppm as N, 1 L

Core & Main Ammonia Standard, 1000ppm as N, 1 L

Mfr Part # AS1000-Q

Product # 706906

$64.70

Core & Main Starch Indicator Solution, 0.5%, 1 L

Core & Main Starch Indicator Solution, 0.5%, 1 L

Mfr Part # ST5005-Q

Product # 707273

$25.15

Core & Main Phosphate Buffer, pH 7.2, 500 mL

Core & Main Phosphate Buffer, pH 7.2, 500 mL

Mfr Part # PH5070-P

Product # 707158

$30.75

Core & Main Mercuric Nitrate Titrant, 0.141N, 1 L

Core & Main Mercuric Nitrate Titrant, 0.141N, 1 L

Mfr Part # MN9340-Q

Product # 707096

$80.40

Core & Main Sodium Thiosulfate, 0.025N, 500 mL

Core & Main Sodium Thiosulfate, 0.025N, 500 mL

Mfr Part # ST2825-P

Product # 707259

$14.55

Core & Main L-Glutamic Acid, ACS Grade, 500 g

Core & Main L-Glutamic Acid, ACS Grade, 500 g

Mfr Part # GL1020-K

Product # 707034

$106.30

Core & Main Sodium Thiosulfate, 0.00564N, 1 L

Core & Main Sodium Thiosulfate, 0.00564N, 1 L

Mfr Part # ST2701-Q

Product # 707257

$45.80

Core & Main Phenylarsine Oxide, 0.00564N, 500 mL

Core & Main Phenylarsine Oxide, 0.00564N, 500 mL

Mfr Part # PO4400-P

Product # 707155

$89.80

Core & Main Ammonia Standard Solution as N, 500 mL

Core & Main Ammonia Standard Solution as N, 500 mL

Mfr Part # AS1030-P

Product # 706917

$34.00

Core & Main Nitrate Standard as N, 100 mg/L (ppm), 500 mL

Core & Main Nitrate Standard as N, 100 mg/L (ppm), 500 mL

Mfr Part # NS4700-P

Product # 707109

$33.05

Core & Main Alkaline-Iodide Azide Reagent, 1 L

Core & Main Alkaline-Iodide Azide Reagent, 1 L

Mfr Part # AI4205-Q

Product # 706894

$82.60

Core & Main Sodium Chloride, 0.141N, 1 L

Core & Main Sodium Chloride, 0.141N, 1 L

Mfr Part # SC3800-Q

Product # 707224

$73.65

Core & Main Silver Nitrate, 0.10N, 500 mL

Core & Main Silver Nitrate, 0.10N, 500 mL

Mfr Part # SN3400-P

Product # 707206

$39.95

Core & Main Acetate Buffer Solution, pH 4, 500 mL

Core & Main Acetate Buffer Solution, pH 4, 500 mL

Mfr Part # AB4150-P

Product # 706881

$22.50

Core & Main Starch Indicator Solution, 1.0% w/v, 1 L

Core & Main Starch Indicator Solution, 1.0% w/v, 1 L

Mfr Part # ST5010-Q

Product # 707276

$27.65

Core & Main Iodine Solution, 0.0282N, 1 L

Core & Main Iodine Solution, 0.0282N, 1 L

Mfr Part # IO2889-Q

Product # 707085

$30.70

Core & Main Magnesium Chloride, Hexahydrate, ACS Grade, 500 g

Core & Main Magnesium Chloride, Hexahydrate, ACS Grade, 500 g

Mfr Part # MG1000-K

Product # 707092

$125.95

Core & Main Sodium Thiosulfate, 0.025N, 1 L

Core & Main Sodium Thiosulfate, 0.025N, 1 L

Mfr Part # ST2825-Q

Product # 707260

$18.25

Core & Main Nitrate ISA Buffer, 1 L

Core & Main Nitrate ISA Buffer, 1 L

Mfr Part # NB3095-Q

Product # 707113

$75.20

Core & Main Magnesium Chloride, Hexahydrate, ACS Grade, 100 g

Core & Main Magnesium Chloride, Hexahydrate, ACS Grade, 100 g

Mfr Part # MG1000-J

Product # 707091

$59.70

Core & Main Iron Standard Solution as Fe, 200 mg/L (ppm), 1 L

Core & Main Iron Standard Solution as Fe, 200 mg/L (ppm), 1 L

Mfr Part # IS1200-Q

Product # 707087

$97.95

Core & Main Sodium Chloride, 0.0141N, 500 mL

Core & Main Sodium Chloride, 0.0141N, 500 mL

Mfr Part # SC3760-P

Product # 707219

$33.15

Core & Main Sodium Thiosulfate, 0.00564N, 500 mL

Core & Main Sodium Thiosulfate, 0.00564N, 500 mL

Mfr Part # ST2701-P

Product # 707256

$30.30

Core & Main Sodium Thiosulfate, 0.025N, 4 L

Core & Main Sodium Thiosulfate, 0.025N, 4 L

Mfr Part # ST2825-G

Product # 707261

$47.45

Core & Main Potassium Acid Phthalate, ACS Grade, 100 g

Core & Main Potassium Acid Phthalate, ACS Grade, 100 g

Mfr Part # PA3000-J

Product # 707177

$52.95

Core & Main Phenylarsine Oxide, 0.00564N, 4 L

Core & Main Phenylarsine Oxide, 0.00564N, 4 L

Mfr Part # PO4400-G

Product # 707157

$199.95

Core & Main Potassium Chromate Indicator, 5% w/v, 500 mL

Core & Main Potassium Chromate Indicator, 5% w/v, 500 mL

Mfr Part # PC8025-P

Product # 707175

$19.00

Core & Main Nitrate Standard as N, 1000 mg/L (ppm), 500 mL

Core & Main Nitrate Standard as N, 1000 mg/L (ppm), 500 mL

Mfr Part # NS4750-P

Product # 707111

$33.15

Core & Main Phosphate Standard, 5ppm, 500 mL

Core & Main Phosphate Standard, 5ppm, 500 mL

Mfr Part # PS3305-P

Product # 707162

$38.30

Core & Main Silver Nitrate, 0.141N, 1 L

Core & Main Silver Nitrate, 0.141N, 1 L

Mfr Part # SN3420-Q

Product # 707209

$109.65

Core & Main Total Alkalinity Indicator, 1 L

Core & Main Total Alkalinity Indicator, 1 L

Mfr Part # AI6925-Q

Product # 706897

$38.95

Core & Main Total Alkalinity Indicator, 500 mL

Core & Main Total Alkalinity Indicator, 500 mL

Mfr Part # AI6925-P

Product # 706896

$25.60

Core & Main Nitrate Standard as N, 2.0 mg/L, 1 L

Core & Main Nitrate Standard as N, 2.0 mg/L, 1 L

Mfr Part # NS4602-Q

Product # 707106

$51.40

Core & Main Potassium Chloride, 4M, Saturated, 500 mL

Core & Main Potassium Chloride, 4M, Saturated, 500 mL

Mfr Part # PC4000-P

Product # 706995

$23.65

Core & Main Silver Nitrate, 0.10N, 1 L

Core & Main Silver Nitrate, 0.10N, 1 L

Mfr Part # SN3400-Q

Product # 707207

$66.40

Core & Main Iodine Solution, 0.0282N, 500 mL

Core & Main Iodine Solution, 0.0282N, 500 mL

Mfr Part # IO2889-P

Product # 707084

$16.35

Core & Main Potassium Iodide, 10% w/v, 500 mL

Core & Main Potassium Iodide, 10% w/v, 500 mL

Mfr Part # PI1410-P

Product # 707184

$32.45

Core & Main Iodine Solution, 0.025N, 500 mL

Core & Main Iodine Solution, 0.025N, 500 mL

Mfr Part # IO2885-P

Product # 707083

$16.35

Core & Main Sodium Carbonate, 0.02N, 1 L

Core & Main Sodium Carbonate, 0.02N, 1 L

Mfr Part # SC3102-Q

Product # 707216

$51.50

Core & Main Phosphate Standard, 5ppm, 1 L

Core & Main Phosphate Standard, 5ppm, 1 L

Mfr Part # PS3305-Q

Product # 707163

$63.20

Core & Main Sodium Chloride, 0.0141N, 1 L

Core & Main Sodium Chloride, 0.0141N, 1 L

Mfr Part # SC3760-Q

Product # 707220

$44.30

Core & Main TISAB II, 1 L

Core & Main TISAB II, 1 L

Mfr Part # TS3000-Q

Product # 707307

$59.95

Core & Main Potassium Iodide, 10% w/v, 1 L

Core & Main Potassium Iodide, 10% w/v, 1 L

Mfr Part # PI1410-Q

Product # 707185

$55.15

Core & Main Iron Standard Solution as Fe, 200 mg/L (ppm), 500 mL

Core & Main Iron Standard Solution as Fe, 200 mg/L (ppm), 500 mL

Mfr Part # IS1200-P

Product # 707086

$53.95

Core & Main Phenylarsine Oxide, 0.00564N, 1 L

Core & Main Phenylarsine Oxide, 0.00564N, 1 L

Mfr Part # PO4400-Q

Product # 707156

$146.80

Core & Main Iodide Reagent, 1 L

Core & Main Iodide Reagent, 1 L

Mfr Part # IO2810-Q

Product # 707082

$45.00

Core & Main Mercuric Nitrate Titrant, 0.0141N, 1 L

Core & Main Mercuric Nitrate Titrant, 0.0141N, 1 L

Mfr Part # MN9141-Q

Product # 707094

$31.35

Core & Main Potassium Chromate Indicator, 5% w/v, 1 L

Core & Main Potassium Chromate Indicator, 5% w/v, 1 L

Mfr Part # PC8025-Q

Product # 707176

$25.95

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