National Testing Laboratories, Ltd.

Founded in 1971, Spectrum Chemicals & Laboratory Products, a division of Spectrum Chemical Mfg. Corp., is a manufacturer and distributor of fine chemicals and laboratory products with quality and delivery you can count on every time. Spectrum has in place the documentation, validation, and... Read More

Weather & Environmental Monitoring -WatchDog™ Weather Stations -WatchDog™ Data Loggers -SpecWare™ Software Nutrient Management Tools -SPAD 502 Chlorophyll Meter -Field Scout™ CM-1000 Chlorophyll Meter Integrated Pest Management (IPM) Tools -Nine Plant Disease Forecast Models... Read More

Myron L manufactures high performance, cost-effective water quality management tools. Our instrumentation makes it simple to measure, monitor and control Conductivity, Resistivity, TDS, pH, ORP, and Temperature. Innovative new field test kits feature conductometric titrations for rapid analysis of... Read More