The Industrial Test Systems WaterWorks 481108 Total Hardness test strips test calcium levels from 0 to 1,000 ppm with a three-second test time. These total hardness water quality test strips evaluate calcium levels in residential, industrial, or educational applications. Each strip tests for total h...

For optimal performance, re-calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges

This is FORENSICS Basic Ammonia NH3 Detector model made to be a workhorse with easy One Button operation. Turn ON and detect immediately with no messing around. Detector is made with a high quality electrochemical sensor Made in Japan. Comes factory calibrated. Ammonia is a toxic gas that requires c...

andheld Carbon Monoxide Meter with High Precision CO Gas Tester Monitor Detector Gauge 0-1000ppm GM8805 5.25 x 2.25 x 1.25 in