Industrial Test Systems 481167 WaterWorks Hydrogen Sulfide Water Test Strips, 30 foil Packed Tests auspowers_batchtwo If ambient temperature changes significantly

If ambient temperature changes significantly then you will need to rezero the refractometer with water

Hold button and auto shut-off

You can refer to the instructional video in the listing

its great for both outdoor and indoor use

Industrial Test Systems 481167 WaterWorks Hydrogen Sulfide Water Test Strips, 30 foil Packed Tests auspowers_batchtwo If ambient temperature changes significantlyIndustrial Test Systems 481167 WaterWorks Hydrogen Sulfide Water Test Strips, 30 foil Packed Tests 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