100% Brand New and high-quality
This item can be used in water purifiers and filters, food
(vegetable, fruits) & drink quality monitoring, pools, spas,
aquariums and hydroponics
Hold function: Saves measurements for convenient reading and
Auto-function: Turns off meter after 10 minutes of non-use to
Dual Range: Measures from 0-999 ppm, with a resolution of 1 ppm.
From 1,000 to 9,900 ppm, the resolution is 10 ppm
Accuracy +/- 2%
Battery: 2 x 1.5V Button Cell Battery
Item size:155mm x 28mm x 15mm
Weight: Approx 70g
Do not drop the entire TDS meter in water or dip beyond the maximum
immersion level (approximately 2" - refer to manual for further
information). This unit is not water-tight and will be damaged if
water enters the unit.
How is TDS properly measured?
Gravimetric methods are the most accurate and involve evaporating
the liquid solvent and measuring the mass of residues left. This
method is generally the best, although it is time-consuming. If
inorganic salts comprise the great majority of TDS, gravimetric
methods are appropriate. (Total dissolved solids, n.d.)
As you could imagine carefully evaporating away the water from a
sample to then weigh what is left over is a tedious process, but it
is the only way to account for dissolved organic matter. Dissolved
organic matter is not a particularly good conductor of electricity,
however in the cases of things like stream water samples have been
taken and analyzed over years to be able to estimate the TDS based
on conductivity to approximate TDS to about 10%
While conductivity and TDS are closely related as we’ve seen they
are completely different measurements. Unfortunately, the
manufacturers of conductivity meters for inorganic substances have
been placing the label TDS on their devices and using conductivity
units like ppm.
For a general rule of thumb, if your concern is measuring dissolved
inorganic material like salts, a conductivity meter will give a
reasonable approximation of the value, but if you are trying to
measure TDS of an organic sample like pond water, the reading will
not be accurate.
Q1. What is your terms of packing?
A: Generally, we pack our goods in neutral PP boxes and brown
cartons. If you have legally registered patent, we can pack the
goods in your branded boxes after getting your authorization
Q2. What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We'll show you the
photos of the products and packages before you pay the balance.
Q3. What is your terms of delivery?
A: EXW, FOB, CFR, CIF.
Q4. How about your delivery time?
A: Generally, it will take 3 to 30 days after receiving your
advance payment. The specific delivery time depends on the items
and the quantity of your order.
Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We
can build the molds and fixtures.
Q6. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, and
requirethat you my friends, pay the sample cost and the courier