Calibration Plugs

Calibrating your Mark 22 portable water quality analyzer has never been this easy. Certified calibration plugs eliminate the need for messy, unreliable conductivity standards. Please specify which microsiemen range needed by choosing from the drop down menu. p/n's 400550, 500549, 400551, 400609, 400614 Want to purchase multiple calibration plugs and save money? View our bundle. SPECIFICATIONS Dimensions 2.25” x 1.4” x 0.875” LWD Weight 4 oz Construction PVC, 0.01% accuracy-rated wire-wound resistors  Warranty Accuracy guaranteed for one year Manufactured in USA ORDERING INFORMATION Part Number Description 400550 Calibration Plug, 0 uS/cm 400549 Calibration Plug, 1 uS/cm 400551 Calibration Plug, 10 uS/cm 400555 Calibration Plug, 50 uS/cm 400609 Calibration Plug, 100 uS/cm 400614 Calibration Plug, 1,000 uS/cm NOTE: All prices FOB Factory. Consult the factory for specific warranty information. Wa