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🧪 Calibrate with Confidence — Because Accuracy is Non-Negotiable
The Hach SpecCheck Secondary Gel Standards Set offers four sealed 10 mL gel cells with chlorine concentrations from 0 to 2.0 mg/L Cl₂, designed for precise low-range chlorine testing calibration. With a 2-year shelf life, non-hazardous formulation, and included Certificate of Analysis, this lab-grade kit ensures consistent instrument response and hassle-free compliance in water quality monitoring.






| ASIN | B00N4028YE |
| Best Sellers Rank | #201,444 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #268 in Analytical Reagents |
| Date First Available | August 28, 2014 |
| Item Weight | 4.9 ounces |
| Item model number | 2635300 |
| Manufacturer | HACH COMPANY |
| National Stock Number | 6550-01-504-0944 |
| Product Dimensions | 3 x 3 x 3 inches |
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