This kit tests for nitrate and phosphate in water using the LRC Comparator. Range/sensitivity is 0.2, 0.4, 0.6, 1.0 ppm NO₃–N; 0.2, 0.4, 0.6, 1.0 ppm PO₄^3–.

The overall texture of a soil affects growth in the root zone, which determines the above-ground growth production, and is determined by the fractions of sand, silt, and clay present. Includes A Study of Soil Science handbook now available as a download.

This kit tests for Wide Range pH using the Octa-Slide 2 Comparator. Range and sensitivity is 5.0, 6.0, 6.5, 7.0, 7.5, 8.0, 9.0, 10.0 pH

This kit tests for QAC using the Direct Reading Titrator method. Range and sensitivity is 0-1,000 ppm/20 ppm, 0-5,000 ppm/100 ppm with dilution.

A masked bromphenol blue indicator is added to the sample and turns green. Sodium tetraphenylboron is added to complex the QAC and the color changes to red. This method is best suited to higher QAC concentrations.

Too Shallow for a Secchi Disk? Turbidity is easily measured by using a standardized turbidity reagent to match the turbidity of a water sample. All the necessary apparatus and reagents needed to test four basic water quality test factors and detailed instructions are housed in a secure foam insert within a rugged field carrying case. Economical reagent refill packages are available for either the entire outfit or individual reagents.

This COD heater block features digital microprocessor control, programmable timer and temperature settings, and a dual LED display to monitor both temperature and timer. Perfect for COD, Total Phosphorus, and Total Nitrogen testing PLUS other tests requiring digestion.

Popular AR-02 outfit provides tests for Hardness, Iron, and pH. Drop count tests for Hardness (10 ppm or 1 gpg/drop). Octa-Slide tests for Iron (0.5-10 ppm) and pH (5.0-10). Includes 100 tests for Iron and 50 tests for each pH and Hardness.

• Wide range Chlorine DipCell measures Chlorine from 0.5-10 ppm
• Carrying case is compact and rugged
• Liquid DPD and Phenol Red offer reagent to measure 144 tests
• Color-coded instructions and reagents
• Separate titration tube for Alkalinity and Hardness avoids pH cell contamination
• Compact reference handbook included

This test kit measures for Chlorine Bleach using the Direct Reading Titrator method. Range/sensitivity is 00-10%/0.2% Cl.

This kit tests for Nitrate-Nitrogen using the LRC Comparator. Range/sensitivity is 0, 0.2, 0.4, 0.6, 0.8, 1.0 ppm NO₃-N.