Calibration Standard for HI 715 Checker HC ®
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The HI 771 Checker®HC is a simple, accurate, and cost effective way to measure ultra-high ranges of chlorine. Designed as a more accurate alternative to chemical test kits, the HI 771 provides quick, accurate results in four easy steps.
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Range 0 - 300 ppm in salt water | Colorimetric Method | Resolution 1 ppm
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Range 0 - 20 ppm | ESPA method | Resolution 0.1ppm
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Range 0.0 - 12.5 ppm | DPD Method | Resolution 0.1ppm
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Range 0 - 200 ppb | ascorbic acid method | Resolution 1 ppb
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Range 0:00 to 2:00 ppm | ASTM D859 Method | 0.01ppm resolution
The HI 775 Checker®HC is a simple, accurate, and cost effective way to measure alkalinity. Designed as a more accurate alternative to chemical test kits, the HI 775 provides quick, accurate results in four easy steps.
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Range: 0 to 300 ppb. The HI 749 Checker®HC is a simple, accurate, and cost effective way to measure low ranges of chromium VI in fresh water. Designed as a more accurate alternative to chemical test kits, the HI 749 provides quick, accurate results in four easy steps. The HI 749 uses an adaptation of the ASTM Manual of Water and Environmental Technology, D1687-92, Diphenylcarbohydrazide method. The reaction between chromium VI and the reagent causes a purple tint in the sample.
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เครื่องวัดค่าเหล็ก รุ่น HI721 
BL983318-1 TDS Mini Controller 0.0 to 10.00 g/L (ppt) - 230V 
HI4104 - Calcium ISE, Polymer membrane combination 
HI717 Checker HC ® - Phosphate, HR 
