Myron L 442 Natural Water Standard Calibration Solution Value and Size:442-300 Quart Calibration gas should be replaced

Calibration gas should be replaced before its expiry date to keep readings accurate and compliant

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Tri-color status indicators on regular self-diagnosis of sensor

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Myron L 442 Natural Water Standard Calibration Solution Value and Size:442-300 Quart Calibration gas should be replacedMyron L 442 Natural Water Standard is the calibration solution to use when your instrument is set to the 442 solution model Myron L's blend that mimics the conductivity TDS behavior of natural waters. Calibrating in the same solution model you measure in is what keeps TDS readings honest. Application Use with Ultrameter II, Ultrameter III, PoolPro, TechPro II, DS pDS meters and Ultrapen PT1 PTBT1 pens whenever readings are reported in 442 TDS. Values