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Xiamen Fangcheng Electronic Science And Technology Co., Ltd. 
We are RO (Reverse Osmosis) membrane and TDS (total dissolved solids)meter manufacturer and supplier.
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Portable Digital TDS3 TEMP PPM Tester TDS Meter Filter Pen Water Quality Purity

Xiamen Fangcheng Electronic Science And Technology Co., Ltd. 

Portable Digital TDS3 TEMP PPM Tester TDS Meter Filter Pen Water Quality Purity

Brand Name : FANGCHENG
Model Number : TDS-3
Certification : CE certification, patent
Place of Origin : China
MOQ : 100PCS
Price : Negotiable (according to your order quantity)
Payment Terms : T/T, Western Union, L/C, D/P
Supply Ability : 100000 pcs / month
Delivery Time : 5-8 working days
Packaging Details : Carton. 35 pcs in a inner box, 210 pcs in a carton.
Color : White
Display : LCD
Range : 0~9990ppm
Warranty : 3 Years
ATC : 5 to 50℃
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Product Description

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 recording
Auto-function: Turns off meter after 10 minutes of non-use to conserve batteries
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

Kindly Note:
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.

Detailed Images


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 letters.

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?


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 cost.

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