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The R-7540 CHEMets Refill is for use with K-7540 (0-40 ppb) and K-7599 (0-100 ppb) Dissolved Oxygen Test Kits.
Application Overview: Monitoring Dissolved Oxygen in High-Pressure Boiler Systems
Cost per test: $1.13Analysis Time: < 1 minute
50 or more $30.60
100 or more $28.90
200 or more $27.20