The Hanna HI97701-11 is a set of CAL Check performance-verification standards for free and total chlorine photometers — a fast, traceable way to confirm your meter is reading correctly without sending it to a lab.

Key features

• NIST-traceable CAL Check standards with a Certificate of Analysis for traceability
• Verify photometer accuracy at any time; recalibrate to the standard if out of specification
• Reusable, ready-made standards

Use with: Hanna HI977XX chlorine photometers including the HI97711. What's included: free and total chlorine CAL Check standard set.

See the meters in our Hanna WQ Meters collection.

Estimated shipping weight: 0.6 lb.