CHEMetrics, Inc. manufactures accurate, portable water analysis test kits in both visual and instrumental formats. The V-2000 multi-analyte photometer tests more than 40 analytes, including ammonia, dissolved oxygen, nitrite, nitrate, phosphate and chemical oxygen demand. It is a microprocessor-based LED photometer and can store up to 100 data points and their time tag for download to a PC. Most tests are “snap and read,” with no samples to prep, powders or chemical contact.