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LaMotte KH/Alkalinity Test Kit 4491- DR-01 / Direct Reading Titrator Method

LaMotte KH/Alkalinity Test Kit 4491- DR-01 / Direct Reading Titrator Method


Item #: LM1111

In Stock

Direct reading titrator for Total Alkalinity. Range is from 0-200ppm with sensitivity in 4.0 ppm increments. Approximately 50 tests.

These kits are part of an ongoing effort by the LaMotte Company Research and Development team to produce new test methods and kits that are faster, easier-to-use, and reduce or eliminate the use of hazardous materials.

Manufacturer information

LaMotte`s Mission is to help people solve analytical challenges by providing innovative solutions through knowledgeable technical guidance, prompt service, & quality products designed for the analysis of water, soil, & air. LaMotte has been a committed leader in providing quality equipment and guidance for water analysis since 1919. Our philosophy has always been that we are in business to help solve your analytical challenge. Today, we produce the broadest line of portable test equipment, and continue our focus on your specific needs by offering improved products, strong technical support and the most extensive Custom Test Kit Service in the industry.

4 Stars

greg stjohn

Reviewed on
March 16, 2012

Yes, I would recommend this.

Confusing at First but good

When it first arrived, I was confused and thought I had received the wrong product. But I read the reviews and comments on this website by other purchasers and began to understand what to do. After using it a couple of times, I think it is easy to use and seems to be a much more precise method than the API test kits. I know what some people say about the color being confusing--it gets a darker blue as it gets close to the end point. But I do it in front of a piece of white paper under a lamp, and by swirling you can see when it is purple.

Was this review helpful? 1 0

brandon walker

Reviewed on
May 05, 2010

Yes, I would recommend this.

Good Kit

Seems accurate... matched the approximate reading of API kit

Was this review helpful? 0 1

craig johnston

Reviewed on
April 02, 2010

Yes, I would recommend this.

not impressed

This kit is designed for swimming pools & hot tubs per the instructions. Has nothing that will give you a reef tank reading. NOT easy to use either!

Was this review helpful? 0 2


Reviewed on
September 12, 2009

Yes, I would recommend this.

Very nice test

Quality test which is accurate and repeatable. It is very important to continue swirling the vial and then let it sit 5 minutes after you think you have reached the endpoint, as the reagents need time to react, and often the solution will revert back to pre-endpoint coloration. You need to keep doing this until it stays at endpoint for an accurate reading. To get dkh from ppm, simply multiply your result by 0.056. My Salifert alkalinity reads 2.3 dkh too high! Many others have experienced this as well.

Was this review helpful? 6 0

richard amos

Reviewed on
August 22, 2009

Yes, I would recommend this.

Good but....

I was using Salifert's Alk testkit and was getting some crazy high readings. I needed another test kit to confirm. I have heard many people claim Salifert is no longer accurate and I also heard that LaMotte's Alk test kit was very good. So I gave it a try. LaMotte confirmed my Salifert readings - they are within .4 dKH of eachother which could very easily be accounted for by user error. The bottom line: Salifert AND LaMotte both appear to be accurate. The Good: Testing process is quick. Components are high quality. Results are just as accurate. The not so Good: as others have said, results are in ppm so you will need to do a conversion. Forget doing math by hand: just Google "ppm to dkh" and click on Saltyzoo (the first result returned for me) for an online calculator. Also as other have said, more of the regeant is needed. You will blow through that much more quickly than the tablets. The bad: As others have said, it is difficult to determine the exact shade of purple at the titration point that indicates you are done. Yes, there is an endpoint - but it takes several drops of regeant to get to it. Where do we stop? I give this product 4 stars because it is accurate and easy. A fifth star would have been given if there was more detailed instruction on where to stop adding regeant and of course if the price was a bit lower. The ppm thing people are complaining about really is no big deal. Overall, IMHO just as good as Salifert (which is a bit cheaper and just as easy to use). I'm glad I have it though as a way to double check results.

Was this review helpful? 3 0

antony fendt

Reviewed on
December 06, 2008

Yes, I would recommend this.

LaMotte KIS Principle

What can I say about using it ... it is fantastic and simple to use, 5 steps to success: (1) Fill the test tube; (2) Add 1 x BCG-MR indicator tablet & swirl; (3) Fill the calibrated tritrator with reagent; (4) Drip into the test tube and swirl until the colour changes; (5) Read alkalinity as CaCO3 in ppm off the scale on the tritrator. Colour change? Fantastic colour scale ... starts green and end point is at purple which is strong and easily identified. If you overshoot, it turns red! By all accounts this test kit is very accurate and very simple to use. I would recommend this alkalinity test kit above any other that I have used.

Was this review helpful? 2 0

george mezori

Reviewed on
July 30, 2008

No, I would not recommend this.

Mmm... it stinks.

First of all it only measures in ppm. I have been using dKH to measure ALK and I don't want to switch/convert. The next thing I noticed was I wasn't sure where to put the water level at. With such a big glass tube it creates quite a large miniscus. I ended up using a syringe(kit does not come with) to measure 5ml. FYI... the bottom of the miniscus(concave part of the water line) should go at the water line mark. Next thing I noticed was the reading was diff. (After trying to convert it to dKH) than my Salifert kit. I redid it. I then tested the kit with a Calibration ALK fluid and it was about 1 dKH off. So i DO NOT recommend this kit. I do like, and Salifert should try, the cap with the hole in it for the last reagent. It was nice to add drops and shake the same time without worrying about the reagent not getting into the bottom right away.

Was this review helpful? 0 3

tony espinoza

Reviewed on
May 05, 2008

Yes, I would recommend this.

Best Alk Test - Hands Down

Big fan of this test. The end-point color is dramatic and clear. From that you learn how to watch for the purple stage before it. Just drop in 5ml, one tablet, swish and titrate. Wonderfully accurate -- The best!

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michael - nj

Reviewed on
March 18, 2008

Yes, I would recommend this.

LaMotte Alkalinity Test Kit

Kit is pretty good. I think it's a little difficult telling when you get the correct shade of purple to stop dripping the reagent.

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Reviewed on
February 18, 2008

Yes, I would recommend this.

Alkalinity test kit

This is my first experience with LaMotte. The test is easy to use and to read. The problem is it dosn't tell you how to convert from ppm to Dkh. Also what you have pictured and what I recieved aren't the same kits.

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