Description
Hardness Test Kits
Calcium and magnesium salts dissolved in water cause hardness which can lead to scale. A standard solution of chelant is used to titrate the hardness in the sample. The indicator changes from red to blue at the titration end point. We offer a variety of hardness test kits including total, calcium, and trace with powder and liquid indicators. Our hardness test kits have a low end sensitivity of less than 0.5 ppm to better detect trace hardness levels.What is the difference between the TK3051-Z kit and the TK3055-Z kit? Our TK3051-Z uses a powder indicator and the TK3055-Z uses a liquid indicator.I am looking for a total hardness kit to test the hardness in a metalworking fluid. It will need to account for magnesium and calcium based hardness. Which kit do you recommend? Our TK3051-Z measures total hardness (Mg and Ca) the titrants are 1 drop =10 ppm and 1 drop = 2ppm as CaCO3. We use a water salt softener in our building and want to make sure that the salt softener is working so we wants to test the levels of the calcium in the water. What is the best and most economical kit to do so? We recommend kit # TK3057-Z - 1 drop = 0.5ppm CaCO.
Shipping and Transit Times
Stocked & Ships Daily from the SE part of the USA.
This product typically ships within 48 upon ordering.
If it must ship today, please indicate so in the notes section upon ordering. We will contact you.
Free shipping transit times map.
Notes:
- We can not ship to PO boxes.
- This map illustrates service schedules in business days as of March 2026 for FedEx Ground shipments.
- ChemWorld is not responsible for delays due to weather or Fedex transit issues. Please take this into account when ordering.
Overnight / Expedite Shipping:
- Orders must be received by 9am EST.
Directions for Expedite Shipping:
- Must order by 9am EST.
- Order as normal through the website.
- If you have a Fedex Account number, enter it in the notes section during ordering with your exact shipping requirements (Next Day 8:30, Next Day 10:30, Next Day 20:00, Fedex 2 AM, or Fedex Express Saver). You are done. We will email you ASAP.
- If you do NOT have an Fedex Account number, we offer overnight delivery for this product. Enter your order as normal and enter your 3 or 4 digit security code in the notes section with your shipping requirements. You are done. We will email you ASAP.
If it is later then noon EST, email us at sales@buychemicalsdirect.com with your request .We will contact you ASAP. You can also call in the order at 800-658-7716 and reference exactly what you need. We will contact you.