Feature●✔EASY TO USE: Single dip and read test strip procedure and optimized color chart make the product ideal for technical and non technical users alike for detection of Hydrogen Sulfide (H2S) in water●✔DETECTION LEVELS: Hydrogen Sulfide (H2S): 0, 0. 3, 0. 5, 1, 2 ppm (mg/L)●✔COMPLETE KIT: Pack of 30 individually wrapped test strips packed in an Pocket Pouch with color chart●✔ACCURATE AND RELIABLE: Components are tested by Quality Control personnel at each step and are rejected if they are outside of specifications. Standards are prepared using calibrated equipment, and concentrations are confirmed by recognized reference methods●✔HIGHEST QUALITY: ITS, manufactures test strip products in their USA facility in an environment that allows for reproducibility, accuracy, and traceability based on Good Manufacturing Practices.✔SUSTAINABLE PACKAGING: New, recyclable Pocket Pouch reduces unnecessary plastic wasteDescription Direct from the Manufacturer - USA WaterWorks Hydrogen Sulfide Water Test Strips #481167 CONTAINS 30 FOIL PACKED TEST STRIPS FOR MEASURING HYDROGEN SULFIDE LEVELS IN WATER. WaterWorks Hydrogen Sulfide Water Test Strips make testing for Hydrogen Sulfide in water a quick and easy process. Simply dip the test strip into your sample according to the instructions provided, remove excess water, wait, and read your results using the color matching guide. Its that simple. WaterWorks Hydrogen Sulfide Water Test Strips now come in new sustainable packaging! Help us eliminate waste by recycling the packet when you have finished testing. Detects: 0, 0. 3, 0. 5, 1, 2 ppm (mg/L).