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The Primo 3 TDS Test Meter Kit
with 1 mg/L EC resolution & 0.1 C resolution

$49.95
Order Now

Cable probe connection
Automatic calibration
Automatic Temperature Compensation

The Primo series of testers provide a fast and dependable way to measure the total dissolved solids or conductivity in your water samples. It is ideally suited for the rigorous demands of water quality professionals as well as home owners and people with water filtration systems. Many professionals use the cabled version of the Primo when demonstrating the before and after results of conditioning and filtration systems. This is one way you can objectively test that your water filter is trapping contaminants.

Temperature is compensated automatically to ensure the readings are consistent to the standard or reference temperature.

Operating and routine maintenance has never been easier. Primo uses a single button at the top of the meter for each parameter. Press it once and the meter is powered and ready for use. Press and hold the button for a few seconds and Primo automatically enters calibration mode. Simply open a sachet of calibration solution, dip the probe in, and within seconds the meter recognizes the calibration solution and calibrates itself!

What is TDS?

The Safe Drinking Water Foundation has defined TDS as follows:
TDS stands for total dissolved solids, and represents the total concentration of dissolved substances in water. TDS is made up of inorganic salts, as well as a small amount of organic matter. Common inorganic salts that can be found in water include calcium, magnesium, potassium and sodium, which are all cations, and carbonates, nitrates, bicarbonates, chlorides and sulfates, which are all anions. Cations are positively charged ions and anions are negatively charged ions. - It can include a whole lot of other junk as well like pharmaceuticals. 

Most people think of TDS as being an aesthetic factor.  In a study by the World Health Organization, a panel of tasters came to the following conclusions about the preferable level of TDS in water:

Level of TDS (milligrams per litre)

Rating

Less than 300 Excellent
300 - 600 Good
600 - 900 Fair
900 - 1200 Poor
Above - 1200 Unacceptible
Taste of Water with Different TDS Concentrations;
www.who.int/water_sanitation_health/dwq/chemicals/tds.pdf

You can use this information to determine how dirty your water really is. Too much TDS is not a great thing. Using the Primo 3 TDS tester will give you the information you will need to make an informed decision regarding your drinking water. This meter is also great for people with water filters like Reverse Osmosis water filtration systems by letting them know when to get a new membrane filter. 

Range   0 to 1999 ppm (mg/L); 0.0 to 60.0C
Resolution   1 ppm (mg/L); 0.1C
Accuracy   2% F.S.; 0.5C
Calibration Solution   HI 70032P
Calibration   automatic, at 1382 ppm
Temperature Compensation   Automatic, 0 to 60C (32 to 140F), =2%/C
Battery Type / Life   2 x 1.5V / approx. 200 hours; auto-off after 5 minutes of non-use
Environment   0 to 50C (32 to 122F); RH max 95%
Dimensions   66 x 50 x 25 mm (2.6 x 2.0 x 1.0") - meter only
Weight   115g (4.1oz)

Order Information:
Primo 3 with 1 m (3.3) cable probe connection is supplied with batteries and instructions.

Primo 3 TDS Test Kit


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Primo 3 TDS Test Meter

$49.95

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