SpecCheck Secondary Gel-Standards Kit for DPD Chlorine Methods

Chlorine SpecCheck Secondary Standards Kit for Mid Range DPD Chlorine Methods. Contains a blank vial and 3 colored vials at ~0.2, ~1.6, and ~2.7 mg/L Cl2. Ready-to-use SpecCheck Secondary Standards Kits include four 10 mL (1 inch) sealed glass cells with a blank and three different standards within the typical testing range, instructions, plastic case and Certificate of Analysis. SpecCheck Standards are computer-formulated and have a two-year shelf life from date of manufacture.
Note: For use only with Mid Range DPD chlorine methods (Pocket Colorimeter II, DR300 and DR900).
Not for use with Low Range methods (including LR/HR Pocket Colorimeter II).