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TDS-3 is the most widely used handheld TDS meter in the world according to HM Digital who holds the original patent for this meter. Beware of imitators, none offer the superior performance of the original TDS-3.
TDS-3 Meters measure the amount of Total Dissolved Solids (TDS) within a given sample of water. The measurement is shown in Parts Per Million (PPM).
TDS is the contaminant category removed by the Reverse Osmosis (RO)Membrane itself. The meter can be used to measure the effectiveness of the membrane only and not the filters used in conjunction with it.
To perform a test on a membrane (2) samples must be drawn. The first is untreated water and the other is RO treated water. Use the TDS reading to calculate a removal ratio. Most Thin Film Composite (TFC) Membranes are effective for 95-98% removal of TDS.
Download Quick-Connect Instructions
Requires Adobe Acrobat Reader
Fitting grips before it seals. Ensure tube is pushed into the tube stop.
Push the tube into the fitting, to the tube stop. The collet (gripper) has stainless steel teeth which hold the tube firmly in position while the O-ring provides a permanent leak-proof seal.
Pull on the tube to check that it is secure. It is a good practice to test the system prior to leaving site and/or before use.
To disconnect, ensure the system is depressurized before removing the tube. Push in collet squarely against face of fitting. With the collet held in this position, the tube can be removed. The fitting can then be re-used.
Download Quick-Connect Instructions
Requires Adobe Acrobat Reader
Fitting grips before it seals. Ensure tube is pushed into the tube stop.
Push the tube into the fitting, to the tube stop. The collet (gripper) has stainless steel teeth which hold the tube firmly in position while the O-ring provides a permanent leak-proof seal.
Pull on the tube to check that it is secure. It is a good practice to test the system prior to leaving site and/or before use.
To disconnect, ensure the system is depressurized before removing the tube. Push in collet squarely against face of fitting. With the collet held in this position, the tube can be removed. The fitting can then be re-used.
John Guest is the originator of Quick-Connect Fitting Technology and the world leader. John Guest Fittings, Valves & Tubing are produced in the UK to exacting quality standards that are second to none!
