Hach Products Testing Equipment Single Parameter Test Kits • Chlorine, Low Range Test Kits • Hardness, Total Test Kits • Nitrogen, Nitrate Test Kits Titration Based Test Kits • Hardness, Total Test Kits • Chlorine, Total, Mid-Range Test Kits • Alkalinity, P & Total Test Kits Multi-Parameter Test Kits • Water Quality DREL Portable Laboratories • DREL/2400 Complete Water Quality Laboratory CEL Portable Laboratories • CEL/890 Advanced Portable Laboratory Color Disc Test Kits • Chlorine, Free Test Kits, Color Disc MEL Portable Laboratories • MEL/850 Potable Water Laboratory Color Cube Test Kits   • Chlorine, Free Test Kits, Cube Colorimeter Test Kits   • Chlorine Free & Total Test Kits   Fine Chemicals and Supplementary Reagents TNTplus Premium Vial Tests • Ammonia TNTplus, Low Range 25 Tests • COD TNTplus, Low Range 25 Tests • Phosphorus TNTplus, LR 25 Tests Reagent Systems • Biochemical Oxygen Demand (BOD) Testing • Trihalomethanes (THM) Testing Chemicals and Reagents • Chlorine Reagent Sets • COD Digestion Vials -to- Conductivity Standard • Phosphonates -to- Phosphorus Spectrophotometers and Instruments On-line Instruments and Analyzers Data • sc100 and sc1000 Universal Controllers • Chlorine On-line Instruments • Hardness On-line Instruments Management Systems • MOD I/O MODBUS Interface • AquaTrend(TM) • Hach OPC® Software Distribution Monitoring Systems • Water Distribution Monitoring Panel • Water Distribution Monitoring Panel, Wallmount • WDM PipeSonde In-Pipe Probe Sample conditioning • Filtrax 2m unheated hose, 115 Vac • Filtrax 10 m heated hose, 115 Vac • Filtrax 20 m heated hose, 115 Vac