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T.M.I.

Test and Measurement Instruments C.C.

          CK 1985/007464/23

“Tomorrow’s Instruments Today”  —  “For Good Measure” ®

TMI, Established—1982

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PartNo:   PCD-432

Digital TDS / Conductivity Meters

TDS, Conductivity

Lutron Instruments YK-22CT Combo Conductivity / Total Dissolved Solids, TDS MeterLutron Instruments YK-22CT Combo Conductivity / Total Dissolved Solids, TDS Meter

Part No:  CD-4303 

Conductivity Meter :       200uS/2mS/20mS, RS232, Data-Hold, Min/Max, Memory, ATC. Microcomputer circuit. Large LCD display.

Lutron Instruments CD-4303 Digital Conductivity Meter

Part No:  YK-2005CD

Conductivity Meter : 200uS/2mS/20mS/200mS, Real Time Data Logger (16000 Point), Record-Min.Max, Data-Hold & RS232

Lutron Instruments YK2005CD Digital Conductivity Meter

Lutron

Lutron

Lutron Instruments YK2005CD Digital Conductivity MeterLutron Instruments CD-4303 Digital Conductivity MeterLutron Instruments CD-4303 Digital Conductivity MeterLutron Instruments YK2005CD Digital Conductivity Meter

Conductivity Meter : 2 Ranges: 2,000 uS, 20mS, External Probe. Data Hold, Records Min/Max, Auto Temp Compensation.

Lutron Instruments PCD-431 Pen Type Conductivity MeterLutron Instruments PCD-431 Pen Type Conductivity Meter
Lutron Instruments PCD-431 Pen Type Conductivity Meter

Notes on Conductivity Meters.

Conductivity meters, Total Dissolved Solids (TDS) meters and resistivity meters are analytical instruments that measure the conductivity, dissolved solids, and/or resistivity of a liquid sample. They can measure a single variable, a combination of variables, or all three variables. Often, because these variables are related, combination conductivity meters, dissolved solids meters and resistivity meters used. Conductivity, a measure of water’s ability to transmit electrical current, is a gross, indirect measurement of the concentration of ions. Consequently, conductivity can be used to estimate levels of total dissolved solids (TDS), a measurement of the dry mass of dissolved solids in water. As a rule, most of the colloidal particles are included in a TDS measurement. Resistivity, another related variable, is the reciprocal of conductivity. 

Specifications for conductivity meters, dissolved solids meters and resistivity meters include conductivity range, dissolved solids range, and resistivity range; conductivity accuracy, dissolved solids accuracy, and resistivity accuracy; and process media temperature. Portable, hand held, modular, lab, benchtop, field-use, and panel-mounted instruments are commonly available. These instruments have an analog meter, a digital display, or a video display such as cathode ray tube (CRT), liquid-crystal display (LCD), or flat panel display (FPD). Often, conductivity meters, dissolved meters and resistivity meters with manual controls have knobs or potentiometers. Analytical instruments with a digital front panel are programmed with a keypad. Programmable conductivity meters, dissolved solids meters and resistivity meters are also available. 

Conductivity meters, dissolved solids meters and resistivity meters provide electrical outputs such as analog voltages, analog currents, and analog frequencies. Devices with a switch or alarm-relay output are also available. In terms of features, some conductivity meters, dissolved solids meters and resistivity meters are battery-powered, temperature compensated, event triggered, or designed for extreme environments. Others have filters, built-in or self-calibration, or self-test capabilities. Conductivity meters, dissolved solids meters, and resistivity meters with that provide special signal processing and/or filtering are also available. Often, these analytical instruments use Butterworth or Bessel filters. Butterworth filters provide a very flat response. There is almost no attenuation in the passband, and the roll-off rate is somewhat slower than other filters. Bessel filters have a relatively flat passband and slow roll-off.

Test and Measurement Instruments C.C. T+M Instruments

Notes on 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.

Why Should You Measure the TDS Level in Your Water?

Some regulations advise a maximum contamination level (MCL) of 500mg/liter (500 parts per million (ppm)) for TDS, while the World Health Organisation says 1000ppm. Numerous water supplies exceed this level. When TDS levels exceed 1000mg/L it is not considered fit 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.

 

Notes on Water Hardness

Does hard water really create problems ?

Hard water can be a very costly addition to your home primarily because it leaves a residue called hard water scale on all washable surfaces.

Over a period of time, hard water scale can clog your plumbing which eventually reduces water pressure. It damages water heaters, dishwashers, washing machines, coffee makers and virtually all appliances through which water passes. This scale leaves spots or streaks on dishes and glassware, and dulls the look of clothing, floors, sinks, tubs, and even hair.

Corrosion often occurs because of highly acidic water that gradually eats away pipes, appliances, heaters, boilers and air-conditioning units.

Water Softeners are designed to soften water so that it washes brighter, rinses cleaner and feels much better.

High TDS indicates Hard water, which causes scale buildup in pipes and valves, inhibiting performance. Since TDS is related to water hardness, using a TDS meter can be your first step in determining the degree of hardness of the water. Generally speaking, the higher the level of TDS (ppm), the higher the degree of hardness.

Water hardness is typically reported in parts per million (ppm).

 

 

Where Do Dissolved Solids Come From?

Some dissolved solids come from organic sources such as leaves, silt, plankton, and industrial waste and sewage. Other sources come from runoff from urban areas, fertilizers and pesticides used on lawns and farms.

 

Dissolved solids also come from inorganic materials such as rocks and air that may contain calcium bicarbonate, nitrogen, iron phosphorous, sulfur, and other minerals. Many of these materials form salts, which are compounds that contain both a metal and a nonmetal.

 

Salts usually dissolve in water forming ions. Ions are particles that have a positive or negative charge.

Water may also pick up metals such as lead or copper as they travel through pipes used to distribute water to consumers.

 

The efficacy of water purifications systems in removing total dissolved solids will be reduced over time, so it is highly recommended to monitor the quality of a filter or membrane and replace them when required.

Some Sources: tdsmeter.com, globalsource.com

Notes on Health and Water.

Why is pure water healthier to drink?

We are all affected by toxic minerals and chemicals found in the air and in our food on a daily basis. Water is the only way the body has to flush out these toxins. The purer the water is to start with, the higher its capacity to collect and cleanse these compounds from the body.

Why is it very important for children to consume pure water?

A child’s immune system and detoxification system are still developing throughout early childhood and teen years. Exposure to even very low levels of toxic chemicals or lead in drinking water at a young age can lead to increased risks of degenerative diseases and learning disorders in later years. Since many of the crucial defense systems that help protect adults from disease and environmental pollutants are not fully developed in children, they are much more sensitive to contaminants. A child consumes 3 times as much water per pound of body weight than an adult does, so they get a much bigger dose of the contaminants

in our water. Their developing bodies are simply much more sensitive.

Currently, the health standards that determine how much and what levels of contaminants we are permitted to consume in our drinking water are all based on the potential effects on adults.

Don’t you need the minerals in your drinking water?

Inorganic Minerals

It’s believed that mineral waters help furnish elements for body metabolism. However, there is scientific proof to suggest that most of these minerals are in an inorganic (dead) form. They cannot be used in the physiological process of building the human cell, even though in circulation.

With this in mind, we can see that mineral water may give "dead" or "inorganic" minerals to the body which cannot be properly assimilated.

These inorganic minerals may interfere with the delicate and complex biology of the body.

The body's need for minerals is largely met through foods, NOT DRINKING WATER." -The American Medical Journal

Fact: The organic minerals in tap water represent only 1% of the total mineral content of the water.

One glass of orange juice contains more beneficial minerals than 100 lts of untreated tap water.

Organic, or Bioavailable Minerals

Only after they have passed through the roots of plants do these inorganic minerals become organic, through photosynthesis, and capable of being assimilated into our tissues as ORGANIC Minerals.

Pure water removes the inorganic mineral deposits in your body. Organic minerals are fully absorbed and remain in your tissues.

According to many nutritionists, minerals are much easier to assimilate when they come from foods.

Copyright  © 2009—2017 Test and Measurement  Instruments C.C.   |  All rights reserved

TDS, Conductivity Meters

R 600.00

Excl VAT

T+M Instruments TM-TDS4 TDS Handheld Pocket MeterT+M Instruments TM-TDS4 TDS Handheld Pocket Meter

Part No:  CD-4302 

Conductivity Meter :    2mS/20mS, RS232, Pocket Type, Easy Operation. Temperature Compensation, LCD display for Low Power Consumption.

Lutron CD-4302 Pocket Conductivity Meter

Lutron

Lutron CD-4302 Pocket Conductivity Meter
Lutron CD-4302 Pocket Conductivity Meter

Part No:  CD-4301 

Conductivity Meter :    2mS/20/200mS, Portable, Easy Operation. Temperature Compensation, Data Hold,   LCD display for Low Power Consumption.

Lutron CD-4301 Conductivity Meter

Lutron

Lutron CD-4301 Conductivity Meter

Part No:  CD-14     

Calibration Solution. 1.413mS Standard Solution for the following Models:  CD-4301,CD-4302/03/06,           YK-22CT/43CD/2004CD/2005CD.

Lutron CD-14 Calibration Solution 1,413 mS

Lutron

Lutron CD-14 Calibration Solution 1,413 mS

Accessories

Lutron CD-4301 Conductivity MeterLutron CD-14 Calibration Solution 1,413 mS

Part No:  YK-2001PH

pH Meter : Intelligent pH Meter/mV, 0.00to 14.00 pH, +/-19999mV, C/F, Record-Min/Max, Memory, Data Hold Conductivity and TDS, as well as Dissolved Oxygen.

Lutron YK2001PH Intelligent Digital pH Meter

Lutron

Lutron YK2001PH Intelligent Digital pH Meter
Lutron YK2001PH Intelligent Digital pH Meter

Part No:  YK-200PCD

Conductivity Probe for   YK2001PH, 2/20 ms 2 Ranges, 0 to 60 deg C, C/F, ATC (Automatic Temperature Compensation)

Lutron YK-200PCD Conductivity Probe

Part No:  YK-200PCT

Conductivity / TDS Probe for   YK2001PH, 2/20 ms 2 Ranges, Total Dissolved Solids,132 to 20000PPM

Lutron YK200PCT Conductivity Probe

Lutron

Lutron

Lutron YK200PCT Conductivity ProbeLutron YK-200PCD Conductivity Probe

Part No:  YK-200PDO

Dissolved Oxygen Probe for YK2001PH, 0 to 20 m/L Diaphragms and Electrolyte included.

Lutron YK200PDO Dissolved Oxygen Probe

Lutron

Lutron YK200PDO Dissolved Oxygen Probe
Lutron YK-200PCD Conductivity ProbeLutron YK200PCT Conductivity ProbeLutron YK200PDO Dissolved Oxygen Probe

Part No:  PE-03

pH electrode. 0 to 13 pH General Purpose pH Electrode, Epoxy body, 12.3mm dia. X 160mm.

Lutron PE-03 pH Probe

Lutron

Lutron PE-03 pH Probe
Lutron PE-03 pH Probe

Part No:  PE-01     

pH electrode. 0 to 14 pH Professional High Quality pH Electrode, Epoxy body, 9.5mm dia. X 130mm.

Lutron PE-01 pH High Quality Probe

Lutron

Lutron PE-01 pH High Quality Probe
Lutron PE-01 pH High Quality Probe

Part No:  PE-06HD

Spear tip pH electrode. 1 to 13 pH (Typical 0—14 pH) General purpose electrode, ideal for piercing into meat, sausage, cheese. Durable glass in rugged epoxy body.

Lutron PE-06HD Spear Tip pH Electrode

Lutron

Lutron PE-06HD Spear Tip pH Electrode
Lutron PE-06HD Spear Tip pH Electrode

Part No:  ORP-14  

ORP Electrode, with BNC Connector& 3 Meter Cable, 12,5 mm X 150mm, (High Accuracy) For use with ORP203, PH206, PH207,PH208, YK2001PH,YK2005WA

Lutron ORP14 ORP Electrode

Lutron

Lutron ORP14 ORP Electrode
Lutron ORP14 ORP Electrode

Conductivity Meter : 2 Ranges: 2,000 uS, 20mS, Built-in Probe. Data Hold, Records Min/Max, Auto Temp Compensation.

Lutron Instruments PCD-432 Pen Type Conductivity Meter

Lutron

Lutron Instruments PCD-432 Pen Type Conductivity Meter
Lutron PCD-432

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Part No:  PCD-431

Notes on EC or Electrical  Conductivity

The EC (measured in mS/m) of water indicates whether the water is fresh or saline. Electrical Conductivity indicates where the water originates from, so if water travelled over granite, it has an EC of around 5 mS/m. Water that travelled over sedimentary rocks usually has a much higher EC, ranging from 30 to 170 mS/m. Aesthetic problems of water with an EC as high as 150 mS/m, are that it tastes salty and water with an EC higher than 300 mS/m, fail to quench your thirst. The water pH can be increased with the addition of alkaline reagents, such as lime, sodium hydroxide or sodium carbonate. The water pH can be decreased with the addition of acidic reagents, such as sulphuric or hydrochloric acid or it can be done by the addition of carbon dioxide, which forms carbonic acid when it reacts with water. Chemical adjustment of water pH, will increase the salinity of the water, thus care should be taken not to overdose the water with chemicals. This needs to be monitored very carefully.

 

 

 

R 650.00

Excl VAT

TDS Meters can be used in all Water Purification applications, wastewater regulation, aquaculture, hydroponics, and colloidal silver.

Part No:  TM-TDS3

TDS Meter, for Total Dissolved Solids. With Carrying Case.  Reads Temperature. Pocket size. Meter. Measures 0– 9990 ppm. 1000 Hrs Battery life.

TM-TDS3 TDS MeterT+M Instruments TM-TDS3 TDS Handheld Pocket MeterT+M Instruments TM-TDS3 TDS Handheld Pocket MeterTDS3 TDS Meter

TDS Meter, Total Dissolved Solids with built-in Thermometer. Smallest Meter  on Market. Measures 0– 9990 ppm. Resolution -  1ppm. 1000 Hrs Battery Life.

Part No:  YK-22CT

Combo Conductivity and TDS (Total Dissolved Solids) 2mS/20mS (2 ranges), 2000/20000PPM (2ranges)  Datahold  , Min/Max, RS232 output.

Lutron

T+M Instruments TM-TDS4 TDS Handheld Pocket MeterT+M Instruments TM-TDS4 TDS Handheld Pocket MeterLutron Instruments YK-22CT Combo Conductivity / Total Dissolved Solids, TDS Meter

Lutron

T + M®

Part No:  TM-TDS4

T + M®

Part No:WA-2017SD

pH Multifunction Meter with ORP, Dissolved Oxygen, Conductivity, TDS and Salt Meter. Only one probe included: CD/ TDS/ Salt, Others probes are Optional.

Lutron WA-2017SD Combo pH, ORP,DO,TDS,Salt Meter

Lutron

Lutron WA-2017SD Combo pH, ORP,DO,TDS,Salt Meter
Lutron WA-2017SD Combo pH, ORP,DO,TDS,Salt MeterLutron WA-2017SD Combo pH, ORP,DO,TDS,Salt MeterLutron WA-2017SD Combo pH, ORP,DO,TDS,Salt Meter

Test our Service and           

Measure with our                 

Instruments.

Part No:  CD-4317SD

Conductivity Meter.  Real Time Data Logger. TDS and Salt Measurement. Pt Glass Electrode. 200uS/ 2 mS / 20mS / 200mS. Salt 0% - 1% (weight).RS232, USB out.

Lutron CD-4317SD Conductivity Meter

Lutron

Lutron CD-4317SD Conductivity Meter
Lutron CD-4317SD Conductivity MeterFaceBook TMITwitter TMI
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