We recently learned that the maker of SenSafe Water Test Kits has released a new version of the eXact Micro Meter Water Testing Kit that makes accurate chlorine testing with DPD-based chemistry easy for experienced testers and novices alike.

Introducing, for all your chlorine testing needs, the eXact Chlorine Photometer… a digital meter for testing chlorine that has a detection range of 0 to 11 parts per million for both free and total chlorine without the need for drop counting, crushing tablets or dissolving powders.

Using the same hardware platform as the eXact Micro 7+ Meter, this new kit comes with 100 tests for free chlorine (using DPD-1) and 100 tests for total chlorine (using DPD-4)

Aside from the 0.01 ppm resolution with +/- 0.02 ppm accuracy between 0.00 and 2.39 ppm chlorine and its high detection limit of 11 parts per million, the eXact Chlorine Photometer also offers a great deal of versatility for those who may want to test for other water quality parameters such as… Ammonia, Bromine, Chloride/Salt, Chlorine Dioxide, Chromium (in Hexavalent Form), Copper, Cyanuric Acid, Fluoride, Iodine, Iron, Low Range Total Hardness, Manganese, Nitrate, Nitrite, Ozone, Acid pH, Alkali pH, Potassium, Sulfate, Sulfide, and Turbidity.

If the need arises where you need, or want, to test for parameters other than free and total chlorine, simply pick up a bottle of the appropriate reagentstrip and follow the simple instructions in your meter’s manual.

Whether you need a basic test kit for chlorine & pH, a set of easy-to-use chlorine test strips, or an electronic chlorine testing meter, you will find the product to suit your testing needs on ChlorineTests.Com.

You can also find replacement reagents for several different chlorine test kits on ChlorineTests.Com, which naturally means you will find DPD tablets on the site for sure.

And now for a few basic chlorine testing facts:

• Test kits containing only OTO as their chlorine testing reagent will test for total chlorine only.

• Free chlorine testing requires DPD-1. Adding DPD-3 to the sample after adding DPD-1 allows a person to test for total chlorine.

• The USEPA has set the maximum contaminant level for chlorine in drinking water at 4.0ppm. This limit applies to both free chlorine levels and total chlorine levels.

• When testing for parameters other than chlorine, some test kits will require the use of chlorine eliminating agents such as sodium thiosulfate before testing can take place.

• Water containing the same amount of total chlorine as it does has very little or no free chlorine.

• The difference between the free chlorine level and the total chlorine level equals the chloramine concentration.

Do they make a test kit consumers can use to test fluoride levels in drinking water?

Once again we find ourselves drawn back to the eXact Micro 7+ Water Testing Meter which tests for up to 36 different water parameters… including fluoride.

With regard to detection levels of fluoride, the eXact Micro 7+ Meter detects as low as 0.1 ppm fluoride and as high as 1.1 ppm fluoride. The USEPA has set the maximum contaminant level (MCL) for fluoride at 4.0 ppm.

Chemistry method used: “SPADNS”

For water containing levels in excess of 1.1 parts per million the manufacturer of the meter suggests diluting the sample with distilled or deionized water.

Also, please note that the basic eXact Micro 7+ Meter Kit does not include the reagent required for fluoride testing. You can find that available on the manufacturer’s web site

I have well water so I’m safe, right?

Even your water comes from a well, fluoride may still show up in your water supply because it can erode from natural deposits in the Earth and it may also enter the environment as discharge from fertilizer and aluminum factories.

With so many news stories surfacing about pool water and/or drinking water not having adequate disinfectant levels many health officials have started pushing for increased testing and they don’t mean testing for chlorine residuals with test strips or liquid test kits which both require testers to match colors to get readings.

Rather than trust test personnel to use established methods of chlorine testing such as the Taylor FAS DPD Test Kit and/or the recently EPA Approved SenSafe Free Chlorine Water Check product, some folks want to remove as much subjectivity from the chlorine testing process as possible… and that means using meters to test chlorine residuals.

One example of a meter that some folks have turned to goes by the name of Extech (CL200) Exstik Direct Digital Reading Chlorine Meter and you can see a picture of that meter to the left.

The Extech CL200 Chlorine Testing Meter tests only for TOTAL chlorine, uses DPD as its reagent, requires roughly 2 minutes for testing, stores up to 15 readings internally, and detects total chlorine levels down to 0.01ppm (mg/L).

Extech, the manufacturer, claims the EPA has deemed the meter, with its associated DPD testing method, acceptable for wastewater compliance monitoring of Total Chlorine.

From what we can see on the IsoPureWater web site, this meter cannot used generic DPD tablets, DPD powder pillows, or DPD liquids designed for 10 mL sample sizes… and that means having fewer shopping options when the time comes to acquire replacement DPD reagents.

Not necessarily a show-stopper by any stretch of the imagination since a pack of 100 DPD reagent tablets for this meter costs under $30.

Definitely keep this meter in mind should you need a fast, compact meter for testing total chlorine levels in water.

Yesterday we talked about a device called the FM-2 Water Filter Monitor which uses 5 timers and a ‘volumizer’ to keep track of how long water filters have stayed in use.

Today we want to show you a quick and easy way to check the efficiency of your reverse osmosis water filtration system: The AP-1 AquaPro TDS/Temperature Meter makes checking to see if your reverse osmosis filter works properly a quick and painless process.

Simply test the TDS level of water before the filter and after the filter. If you do NOT see the TDS level drop dramatically after the filter, you have a problem with the filter system… and most likely need to change the RO filter.

Benefits and features of the AP-1 AquaPro TDS/Temperature Meter include:

• AP1 Measures TDS (total dissolved solids) and temperature
• Automatic Temperature Compensation (ATC).
• Water resistant housing.
• Measuring range: 0-5000 ppm (parts per million)
• Digital calibration via push button.
• Auto-off and data holding functions. Low battery indicator
• Large and easy to read LCD display includes simultaneous TDS and temperature reading
• Comes factory calibrated with 342 ppm NaCl solution.

Throw in the fact that the meter costs less than $30 at FilterWater.Com, a leading online distributor of water quality filters and drinking water test kits, and you have found yourself an easy and inexpensive way to test the working status of your reverse osmosis water filter system.

A recent addition to the water testing meter market, the Lamotte Color Q, uses either tablets or liquid reagents — depending upon which model you select.

Now that we’ve shown you the meters, we will now list off replacement reagents for various versions of the Color Q water testing meter:

While many companies have moved away from single parameter water testing meters and now produce meters that can test for a number of parameters instead of just one, Hanna recently released its new Hanna Checker HC Photometer for Free Chlorine which tests exclusively for free chlorine using EPA Approved DPD-1 as its reagent.

Specifications for the Hanna Checker HC Photometer for Free Chlorine:

• Detection Range: 0.00 to 2.50 ppm (mg/L)
• Resolution: 0.01 ppm (mg/L)
• Precision: ±0.03 ppm (mg/L) @ 25°C
• Power Source: (1) 1.5 Volt AAA Battery
• Light Source: 525 nm LED
• Sample Size: 10mL
• Applicable Testing Method: Adaptation of the EPA approved DPD method Standard Method 4500-ClG

Does the Hanna Checker HC Photometer for Free Chlorine use DPD?

We already answered this one, but yes, it does. The Hanna Checker HC Photometer for Free Chlorine uses an adaptation of the EPA approved DPD method Standard Method 4500-ClG. Given that the test uses a standard 10mL sample, we would guess that the meter can use any standard DPD reagents for a 10mL sample size.

Our opinion of the meter?

• Many of us here at Water Testing Blog have large hands with clumsy fingers so meters like this one that still use cuvettes, and GLASS cuvettes at that, kind of scare us. On top of that, most pool areas prohibit the use of glass in the pool area and many food processing facilities do as well.

• The meter appears to use pouches of powder which get ripped open prior to use… and we see people accidentally spilling the DPD powder and/or having trouble pouring the powder into the little cuvette — especially if testing outdoors in a breezy climate like one might find poolside.

• Having said all that, we DO, however, think that Hanna hit a nice price point w/ this meter; not too expensive and not too inexpensive.

• Hanna MISSED the mark w/ its pricing for the DPD-1 reagents. Each test will cost nearly $0.40 to run… when other testing methods use DPD-1 reagents (i.e. DPD tablets) that cost less than $0.10 per test.

Kyle from Florida asked,

My company does a lot of plumbing work for residential and commercial customers. Not all the time, but many times we get asked to test the water once we finish a job. I see a lot of test kits that use drops and those test strips on the market, but I want to use something a bit more professional like a meter of some sort. All the meters I’ve seen out there that test for a bunch of parameters have a ton of buttons, vials, powders and an instruction manual you could use to knock out a cow. Do they make a multipurpose water testing meter for the simple guy? Thanks for your help and I love the site. Lot of good info here!

Stop it, Kyle, before you make us blush!

To answer your question directly, yes you can find a reliable water testing meter made for the ‘simple guy’ and no you will not have to attend night school just to figure out how it works.

The eXact Micro 7+ Water Testing Meter offers extreme versatility, has only one button to worry about, does not use vials, and comes with a handy, compact manual barely capable of killing a fly.

Below you will see a quick demonstration of how easily you can test water:

Now Kyle, if that looked like too much work, or like it involved way too much ‘technical stuff’, then you may as well hang up your water testing hat(?) and send all your samples out to a place like National Testing Labs ‘cuz testing water in the field does not get any easier than it does with the eXact Micro 7+ Water Testing Meter.

• Direct read parameters — Total Alkalinity, Bromine, Calcium Hardness, Free Chlorine, Total Chlorine, Copper, Ozone, Permanganate, and pH

• Additional parameters — Ammonia, Chloride (as NaCl), Chlorine Dioxide (DPD-1), Chromium Hexavalent, Cyanuric Acid, Fluoride, Hydrazine, Hydrogen Peroxide (Low, Mid and High Range), Iodine (DPD-1), Iron (Fe+2), Total Iron (Fe+2/Fe+3), LR Total Hardness (as CaCO3), Magnesium, Manganese, Nitrate (as NO3), Nitrite (as NO2), pH (Acid and Alkali), Potassium, Protein (as BSA), Sulfate, Sulfide, and Turbidity. Kit includes conversion chart for these parameters.

• USEPA Compliant meter for Free & Total Chlorine — 0.01 ppm (mg/L) precision

• Built-in, permanent cell — no loose glass or plastic cells to lose

• Easy fill testing — Simply fill or dip meter into water

• Automatic countdown timer for accurate timing of testing

• 140 test memory — saves 20 tests per menu item

• No-slip grip housing — ideal for wet testing conditions

• Lightweight — weighs only 6 ounces w/ batteries installed

• Waterproof — IP-67 Rated and meter will float if dropped into water

• Easy-to-read LCD display — no color matching required

• Environmentally friendly — recyclable parts & uses 60% less reagents than 10mL sample tests

• CE certification

TeddyGurl recently asked,

I want to know more about the water parameter tests such as turbidity, pH, chlorine, and calcium.

What is the common testing method that should be done?

Thank you for your question TeddyGurl. We will address each part of your inquiry separately.

Turbidity refers to the level of cloudiness or haziness in a liquid caused by concentrations of small particles, also known as suspended solids. The higher the concentration of these particles, the greater the turbidity of the liquid and more cloudy it appears.

To measure turbidity, one typically uses a meter of some sort. The eXact Water Testing Meter has a detection range of 3 to 580 NTU.

For the record, water with a turbidity reading of around 500 NTU will appear milky to the naked eye and water with a turbidity reading of around 50 NTU will appear cloudy, but still allow light to pass through.

pH refers to the measure of how acidic or basic a solution is. Its scale runs from 0.0 to 14.0 with 7.0 as its neutral (not acidic and not basic) value. Solutions with pH values greater than 7.0 get labeled as basic and solutions with pH values less than 7.0 get labeled as acidic.

To measure pH, one has several options: liquid/powder/tablet based test kits, test strips and electronic meters.

Chlorine gets added to drinking water as a disinfectant (an antimicrobial agent used on non-living objects to eradicate and destroy microorganisms which can cause infection). The United States Environmental Agency has set the Maximum Contaminant Level (MCL) for chlorine at 4.0 ppm (parts per million), or 4.0 mg/L (milligrams per liter).

When testing for chlorine in water, one can choose between liquid/powder/tablet based test kits, test strips and electronic meters.

Calcium has the atomic number of 20 and ranks as the fifth most abundant element in the Earth’s crust. When it comes to drinking water, calcium acts to ‘harden’ the water and so therefore when one measures the hardness of water, one actually measures the calcium (and magnesium to a lesser extent) concentration in the water.

To measure the calcium content in water, one can choose between liquid/powder/tablet based test kits, test strips and electronic meters.

Whether testing for chlorine in drinking water, pool water, or water about to go into an a aquarium, the fact remains that a person needs to have fast, accurate chlorine testing methods readily available. www.Chlorine-Test-Kit.com provides links to chlorine testing meters, liquid kits for chlorine testing, replacement reagents for chlorine testing, and test strips for chlorine testing.