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Description SimplexHealth Total Hardness test strips are perfect to test the hardness of your water, to check the performance of your water softener, for service work, classroom demonstrations, or to give to customers instead of an expensive service call. This full range test kit lets you measure hardness on a very wide range of 0ppm to 500ppm (mg/l). (ppm = parts per million) The definition of water hardness is most commonly expressed as milligrams of calcium carbonate equivalent per litre*: Soft: calcium carbonate at concentrations below 60mg/l (<60ppm) Moderately hard: water contains calcium carbonate at concentrations between 60 and 120mg (60 to 120ppm) Hard: above 120 and 180mg (120 to 180ppm) Very hard water contains more than 180mg (>180ppm) (*Source WHO. The definition of soft to hard water varies slightly between publications of various industry bodies.) Total Hardness test strips for water quality offer a wide range of detection and are calibrated to be both accurate and sensitive: Simple Dip-Wait-Read Testing Method Low cost and high accuracy Test strips are stored in a resealale bag to protect them Ideal for quick and reliable testing of water Accurate results are achieved less than one minute This product is safe and easy to use since there are no chemicals to mix, an MSDS is not required With total hardness water quality test strips you are in control and can find out exactly where your calcium level is before it becomes a problem. Understanding your Results: Hardness greater than 80ppm: Detergents with softening agents are not completely effective in cleaning Hardness greater than 120ppm: Some scaling will occur in pipes and appliances Hardness greater than 250ppm: Dishwasher impossible to use without producing film on dishes Suitable for: fresh water samples, including water from taps, wells, springs, boreholes, ponds, as well as rain water How to Use : 1) Dip the Stick into water the water sample for 3 seconds without motion 2) Remove and shake the strip once, briskly, to remove excess water. 3) Immediately match colour of strip to the colour chart on the container. Contains: 20 strips in a resealable aluminium pouch Sensitivity: 0, 50, 125, 120, 250, 500 PPM (MG/L) or 0, 3, 7, 15, 29 GPG Total Test time: 3 seconds Measurement as Calcium Carbonate CaCO3. General description: For semi-quantitative determinations. Detection method: colorimetric. Fast, simply dip and read indicator paper. Consists of a plastic strip with attached sealed test paper. Compare colour change of test paper with fields of equal size on colour chart provided on pouch. Please note:  Store in a cool, dry place (between 20- 30°C) and away from excess heat and direct sunlight. Keep away from children and pets. Avoid contact of test areas on strips with skin & eyes, do not ingest or expose to acids. Do not touch test pad. This is a screening test and can not be used to certify water as safe or unsafe for drinking. It provides approximate results ONLY when used in strict accordance with instructions. SimplexHealth expressly disclaims any liability resulting from the use of this product, failure to follow instructions, or reliance of test results. This is not a measuring instrument. This product is not intended to diagnose, treat or monitor any medical condition. Wash hands before and after use. The contents of the kit should not come in contact with food or consumables. Once the test has been completed, dispose of it responsibly. Made in USA MPN: 1004-SF(20T)