Sechang Instruments Blog

Industrial Measurement Guides & Technical Insights

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Conductivity Meter for Water Treatment: Measuring EC, TDS, and Salinity in Industrial Water Systems EN

Conductivity meter guide for industrial water: measuring electrical conductivity, TDS, and salinity, plus online conductivity analyzer selection.

Sep 3, 2026 · 2,050 words

COD Analyzer for Wastewater Treatment: Chemical Oxygen Demand Measurement Methods, Regulatory Limits, and Online Monitoring EN

COD analyzer guide for wastewater treatment: chemical oxygen demand measurement by dichromate method, regulatory discharge limits, and online COD monitoring.

Sep 1, 2026 · 1,820 words

Fluoride in Drinking Water: WHO and EPA Limits, Health Effects, and Online Fluoride Analyzer Selection Guide EN

Fluoride in drinking water guide: WHO and EPA limits, ISE and colorimetric detection methods, online analyzer selection, and defluoridation treatment options.

water-quality fluoride drinking-water water-analysis en
Aug 29, 2026 · 2,129 words

Heavy Metal Testing in Water: ICP-MS vs Voltammetry vs ICP-OES — Choosing the Right Method EN

Compare ICP-MS, ICP-OES, and voltammetry for heavy metal testing in water: detection limits, elemental scope, regulatory acceptance, and cost trade-offs.

water-quality heavy-metals ICP-MS water-analysis en
Aug 27, 2026 · 2,266 words

Ion Chromatography for Water Quality Analysis: EPA Method 300, Anion Detection, and Online IC Systems EN

Ion chromatography is the gold standard for multi-anion water analysis: EPA Method 300, suppressed conductivity detection, column selection, and MDL values.

water-quality ion-chromatography EPA-method water-analysis en
Aug 25, 2026 · 2,188 words

Chlorine Residual Analyzer: Free Chlorine vs. Total Chlorine Measurement in Water Treatment EN

Chlorine residual analysis for drinking water, pools, and industrial systems: free vs total chlorine, DPD colorimetry, amperometric sensors, limits.

Water Analysis Chlorine Disinfection Water Treatment
Aug 20, 2026 · 1,611 words

Ammonia Nitrogen Analyzer for Wastewater Treatment: Online Monitoring, Sensor Types, and Regulatory Compliance EN

Ammonia nitrogen (NH3-N) measurement guide for wastewater: ISE, colorimetric, UV sensors, regional discharge limits, and aeration process integration.

Wastewater Ammonia Nitrogen Water Analysis
Aug 18, 2026 · 1,474 words

TOC Analyzer for Pharmaceutical and Semiconductor Water: USP <643>, SEMI F63, and Online Monitoring Guide EN

TOC analysis for pharmaceutical WFI and semiconductor ultrapure water: UV oxidation, combustion, USP <643>, EP 2.2.44, SEMI F63, online monitoring.

TOC Pharmaceutical Semiconductor Ultrapure Water Water Quality
Aug 15, 2026 · 1,389 words

Strontium-90 in Water: How to Monitor This Invisible Radioactive Threat EN

How utilities and environmental labs detect radioactive Strontium-90 (Sr-90) in water: regulatory limits and reliable field measurement methods.

Water Quality Radiation Monitoring Environmental Analysis Nuclear
Aug 14, 2026 · 1,128 words

2026 환경부 수질 TMS 기준 완전정리 | 측정기 선택 가이드

2026년 환경부 수질 TMS 기준 완전 정리 — 자동측정기기 설치 항목, 허용 오차, 운영 기준, 측정기 선택 가이드.

water TMS environmental regulation wastewater Korea TMS standards
Aug 13, 2026 · 934 words

Bromine in Water Treatment: Cooling Towers, Swimming Pools, and Field Measurement with CHEMets K-1605 EN

Bromine vs chlorine in cooling towers and spa pools: superior pH and temperature stability, target residual levels, and accurate field measurement.

bromine water treatment cooling tower swimming pool CHEMets field test kit
Aug 11, 2026 · 1,033 words

Selenium in Water: Environmental Limits, Industrial Wastewater Monitoring, and Choosing the Right Analyzer EN

Selenium in industrial wastewater: regulatory limits (WHO 0.04, Korea/Japan 0.01 mg/L), speciation, and choosing between field kits and ICP-MS.

selenium water quality environmental monitoring heavy metals industrial wastewater
Aug 9, 2026 · 1,039 words