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Leasing Available

Welcome to your premier source for the finest quality water testing instrumentation.

 

Our handheld and portable TDS, EC and pH testers, in-line monitors, controllers and demonstration devices for reverse osmosis (RO) water filters and water purification systems are superior in construction and performance, yet made available at a very economic cost. Ampac USA present a complete line of  economical in-line dual TDS meters that measure total dissolved solids (TDS) levels of feed and product water lines simultaneously, an effective way to compare rejection rates and gauge reverse osmosis membrane, water filter and water purification performance.

With Ampac USA water testing instruments, you'll know if your water is pure.

 

Please click products to learn more about which TDS tester is right for you.

What is a TDS and How to reduce or remove TDS in your water

(Total Dissolved Solids)

 

Handheld Monitors:

TDS-EZ Water Quality Tester

 

TDS-3 Handheld Meter With Carrying Case

TDS-4 Pocket-Size Meter

 

TDS-4TM: Pocket-Size Meter with Digital Thermometer

COM-100: Waterproof EC / TDS / Temp Combo Meter

PH-200: Waterproof pH Meter

 

ORP-200: Waterproof ORP Meter

TM-1: Industrial-Grade Digital Thermometer

 

Ideal for all basic water testing applications. The best value meter in the world!

 

 

 

 

 

 

 

 

 

 

Ideal for all water purification applications, wastewater regulation, aquaculture, hydroponics, and colloidal silver. Perfect for both consumer or commercial use. Carry one in your pocket or toolbox at all times!

 

 

 

 

 

 

 

A TDS tester that's ideal for all water purification applications, wastewater regulation, aquaculture, hydroponics, and colloidal silver. Perfect for both consumer or commercial use. Carry one in your pocket at all times!

 

 

 

 

 

 

Ideal for all water purification applications, wastewater regulation, aquaculture, hydroponics, and colloidal silver.

 

 

 

 

 

 

 

 

 

Ideal for all water quality testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment and more.

 

 

 

 

 

 

Ideal for all pH testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment, wine, coffee, agriculture and more.

 

 

 

 

 

 

Ideal for all ORP testing, including anti-oxidant measurement, water purification applications, ionizers, agriculture, aquariums & aquaculture, chlorine monitoring, cooling tower disinfection, environmental testing, fruit & vegetable washing, hydroponics, metal finishing, ozone system monitoring, pharmaceutical & medical applications, pools & spas, pulp bleaching, vineyards & wineries and water treatment.

For use in: All hot and cold fluids and/or solids Aquariums Kitchens and bakeries Hydroponics and aquaculture Freezers/coolers and heating systems Motors, generators and ventilations systems Academic, scientific and medical laboratories

 

 

 

 

 

 

 

 

What is TDS?

Total Dissolved Solids (TDS) are the total amount of mobile charged ions, including minerals, salts or metals dissolved in a given volume of water, expressed in units of mg per unit volume of water (mg/L), also referred to as parts per million (ppm). TDS is directly related to the purity of water and the quality of water purification systems and affects everything that consumes, lives in, or uses water, whether organic or inorganic, whether for better or for worse.

What Are Total Dissolved Solids?

  • "Dissolved solids" refer to any minerals, salts, metals, cations or anions dissolved in water. This includes anything present in water other than the pure water (H20) molecule and suspended solids. (Suspended solids are any particles/substances that are neither dissolved nor settled in the water, such as wood pulp.)
  • In general, the total dissolved solids concentration is the sum of the cations (positively charged) and anions (negatively charged) ions in the water.
  • Parts per Million (ppm) is the weight-to-weight ratio of any ion to water.
  • A TDS meter is based on the electrical conductivity (EC) of water. Pure H20 has virtually zero conductivity. Conductivity is usually about 100 times the total cations or anions expressed as equivalents. TDS is calculated by converting the EC by a factor of 0.5 to 1.0 times the EC, depending upon the levels. Typically, the higher the level of EC, the higher the conversion factor to determine the TDS. NOTE - While a TDS meter is based on conductivity, TDS and conductivity are not the same thing. For more information on this topic, please see our FAQ page.

Why Should You Measure the TDS Level in Your Water?

The EPA Secondary Regulations advise a maximum contamination level (MCL) of 500mg/liter (500 parts per million) (ppm) for TDS. Numerous water supplies exceed this level. When TDS levels exceed 1000mg/L it is generally considered unfit for human consumption. A high level of TDS is an indicator of potential concerns, and warrants further investigation. Most often, high levels of TDS are caused by the presence of potassium, chlorides and sodium. These ions have little or no short-term effects, but toxic ions (lead arsenic, cadmium, nitrate and others) may also be dissolved in the water.

Even the best water purification systems on the market require monitoring for TDS to ensure the filters and/or membranes are effectively removing unwanted particles and bacteria from your water.

The following are reasons why it is helpful to constantly test for TDS:

Taste/Health
High TDS results in undesirable taste which could be salty, bitter, or metallic. It could also indicate the presence of toxic minerals. The EPA's recommended maximum level of TDS in water is 500mg/L (500ppm).
Filter performance
Test your water to make sure the reverse osmosis or other type of water filter or water purification system has a high rejection rate and know when to change your filter (or membrane) cartridges.
Hardness
High TDS indicates Hard water, which causes scale buildup in pipes and valves, inhibiting performance.
Aquariums/Aquaculture
A constant level of minerals is necessary for aquatic life. The water in an aquarium or tank should have the same levels of TDS and pH as the fish and reef's original habitat.
Hydroponics
TDS is the best measurement of the nutrient concentration in a hydroponic solution.
Pools and spas
TDS levels must be monitored to prevent maintenance problems.
Commercial/Industrial
High TDS levels could impede the functions of certain applications, such as boilers and cooling towers, food and water production and more.
Colloidal silver water
TDS levels must be controlled prior to making colloidal silver.
Coffee and Food Service
For a truly great cup of coffee, proper TDS levels must be maintained.
Car and window washing
Have a washer with a spotless rinse? An inline dual TDS monitor will tell you when to change the filter cartridge or RO membrane.

 

How Do You Reduce or Remove the TDS in Your Water?

Common water filter and water purification systems:

Carbon filtration:

Activated Carbon (Granular and Solid Block)

Granular activated carbon is a well-established technology for the reduction of a wide range of aesthetic contaminants, and is quite effective in the reduction of some health contaminants such as volatile organic compounds (benzene, trichloroethylene, and other "petroleum"-based contaminants.

Because of its molecular makeup, activated carbon can adsorb well, meaning that it can take in or collect many organic molecules on its surface. Granular activated carbon filters are typically inexpensive, and maintenance involves replacing six to twelve cartridges a year, depending on the quality of the raw water and the filter media.

Specially designed solid block and precoat activated carbon filters are also available, which are effective at reducing heavy metals such as lead and mercury. Solid block filters with a pore size smaller than 0.2 microns are often effective against biological contaminants as well.

Microfiltration

Microfiltration uses a filter media with a pore size smaller than 0.2 microns to physically prevent biological contamination from passing through. Ceramic and solid block carbon are commonly used to provide microfiltration. Ceramic filters have and advantage in that they can often be cleaned and reused a number of times before they lose effectiveness.

Carbon block media usually has to be disposed of after each use. This media, however, provides additional treatment for a variety of other health and aesthetic contaminants (see activated carbon section). Microfiltration is effective for treating the full range of biological contaminants, including hard-shelled cysts like Cryptosporidium.

 

Reverse Osmosis (R/O):

The article below is provided by the Water Quality Association.

What is Reverse Osmosis? 

Anyone who has been through a high school science class will likely be familiar with the term osmosis. The process was first described by a French Scientist in 1748, who noted that water spontaneously diffused through a pig bladder membrane into alcohol. Over 200 years later, a modification of this process known as reverse osmosis allows people throughout the world to affordably convert undesireable water into water that is virtually free of health or aesthetic contaminants. Reverse osmosis systems can be found providing treated water from the kitchen counter in a private residence to installations used in manned spacecraft. 

Reverse Osmosis is a technology that is found virutally anywhere pure water is needed; common uses include:

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Drinking Water
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Humidification
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Ice-Making
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Car Wash Water Reclamation
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Rinse Waters
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Biomedical Applications
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Laboratory Applications
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Photography
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Pharmaceutical Production
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Kidney Dialysis
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Water used in chemical processes
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Cosmetics
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Animal Feed
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Hatcheries
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Restaurants
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Greenhouses
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Metal Plating Applications
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Wastewater Treatment
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Boiler Water
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Battery Water
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Semiconductor production
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Hemodialysis
 

How Reverse Osmosis Works

A semipermeable membrane, like the membrane of a cell wall or a bladder, is selective about what it allows to pass through, and what it prevents from passing. These membranes in general pass water very easily because of its small molecular size; but also prevent many other contaminants from passing by trapping them. Water will typically be present on both sides of the membrane, with each side having a different concentration of dissolved minerals. Since the water i the less concentrated solution seeks to dilute the more concentrated solution, water will pass through the membrane from the lower concentration side to the greater concentration side. Eventually, osmotic pressure (seen in the diagram below as the pressure created by the difference in water levels) will counter the diffusion process exactly, and an equilibrium will form.

 

Distillation:
Distillation involves boiling the water to produce water vapor. The water vapor then rises to a cooled surface where it can condense back into a liquid and be collected. Because the dissolved solids are not normally vaporized, they remain in the boiling solution.Distillation is one of mankind's earliest forms of water treatment, and it is still a popular treatment solution throughout the world today. In ancient times, the Greeks used this process on their ships to convert sea water into drinking water. In far-eastern cultures, water was distilled for use in "Ranbiki" tea ceremonies.

Today, distilled water is still used to convert sea water to drinking water on ships and in arid parts of the world, and to treat water in other areas that is fouled by natural and unnatural contaminants. Distillation is perhaps the one water treatment technology that most completely reduces the widest range of drinking water contaminants.

Not only is distillation one of the most effective forms of treatment, but it is also one of the easiest to understand: untreated water is converted into water vapor, which is then condensed back into liquid form. Most of the contaminants are left behind in the boiling chamber, with the condensed water being virtually contaminant-free. Anyone who has accidentally let a pot of water boil completely out on the stove is familiar with this process, and familiar with the crust of contaminants typically left behind after the water is gone.

In nature, this basic process is responsible for the hydrologic cycle. The sun causes water to evaporate from surface sources such as lakes, oceans, and streams. The water vapor eventually comes in contact with cooler air, where it re-condenses to form dew or rain. This process can be imitated artificially, and more rapidly than in nature, using alternative sources of heating and cooling.
 
 
Deionization (DI)
Water is passed between a positive electrode and a negative electrode. Ion selective membranes allow the positive ions to separate from the water toward the negative electrode and the negative ions toward the positive electrode. High purity de-ionized water results. The water is usually passed through a reverse osmosis unit first to remove nonionic organic contaminants.

 

Deionization (DI) is a water filtration process whereby total dissolved solids (TDS) are removed from water through ion exchange. In simple terms, by controlling the electric charge of ions in the water, it is possible to remove the TDS. Much like a positively charged magnet will attract a negatively charged magnet (and vice-versa), DI resins attract non-water ions and replace them with water ions, leaving a more pure water form.

The process of deionization uses two resins that are opposite in charges – the cationic (negative) and the anionic (positive). The cationic resin is typically made from styrene containing negatively charged sulfonic acid groups, and will be pre-charged with hydrogen ions. This resin will attract the positively charged ions in the water (Ca++, Mg++, Na+, etc.) and releases an equivalent amount of hydrogen (H+) ions.

Like the cationic, the anionic resin is also made from styrene, but contains positively charged quaternary ammonium groups, and will be pre-charged with hydroxide ions. This resin will attract the negatively charged ions (HCO3-, Cl-, SO4--, etc.) and releases an equivalent amount of hydroxide (OH-). The hydrogen and hydroxide ions then combine to form water. (H+ + OH- = HOH or H2O.)

 

Before using R/O System
(TDS range from 250-450ppm)

After using R/O System
(TDS range from 5-26 ppm)

TDS1.gif (1567 bytes)

250 ppm

TDS2.gif (1567 bytes)

10 ppm

Secure Purchase Online 

Secure Purchase Online 

Features:

Features:

  The monitor has two sensors that will operate when it senses the difference of TDS between the supplied water and the purified water though the R/O membrane.

  If the TDS does not drop to the desired rate while purifying the water, the red light will turn on and make a buzzing sound.

  The water purifies can be purified with requiring rates defermined by the client.  Commonly it is produced at the following range.
  High-5%, Med-15% , Low-35%. 

  Can take measurement at two points with in & out probes, Usually at Feed inlet and Product out-let. 
 

  Easy installation.

  Power is off automatically after 10 minutes of non-use

Specifications

   Range : 1 ~ 9990ppm
   Accuracy : ± 2%
   Battery : 2x 1.5V (Button Cell)
  
Size : 76mm x 20mm x 47mm(L x W x H)

Specifications

   Range : 1 ~ 9990ppm
   Accuracy : ± 2%
   Battery : 2x 1.5V (Button Cell)
  
Size : 76mm x 20mm x 47mm(L x W x H)

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