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HM Digital 1000 ppm TDS Calibration Solution, 3 oz HM Digital NaCl calibration solution 1000 ppm comes in lightweight HDPE plastic bottles. Sealed with a coated foam liner. For optimal performance, re-calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges. Features: 1000 ppm NaCl calibration solution Comes in lightweight HDPE plastic bottles Sealed with a tamper-evident closure
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🇺🇸 Ship from USA · On Agora since 2026
$9.20