Water Tds Test Pen

Feature 1, Measures Total Dissolved Solids(TDS), Electrical Conductivity(EC),and Temperature simultaneouly. 2. Simple operation and easy to carry; 3. Display the status of drinking water ; 4. Low power consumption design, battery life is about 1500 times; 5. High accuracy and automatic temperature compensation;
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Product Details

water tds test pen

water tds test pen

water tds test pen

Test Item

Measuring Range



Other Technical





Working voltage:1X3V

Working condition:0-50℃









water tds test pen

TDS: TDS includes a mixture of inorganic salts, mostly sodium, chloride, potassium, calcium, and magnesium.  Rather than testing the particular components, TDS is monitored by measuring the conductivity of the water with a digital meter. There is no test strip or color disk kit that can be used here, although at least one conductivity meter interfaces with a smartphone.

TDS = Total Dissolved Solids, which is any salt, metal or mineral in the water. With the push of a button, the TDS can tell you your overall water purity level,which will be displayed on the screen in ppm (parts per million). The lower the TDS level, the purer the water, with 0 ppm being pure H2O. The TDS is great for checking your tap water quality, or knowing when to change afilter. (The meter does not test for biological contaminants.) The TDS is a great tool for drinking water,water filtration and purification, colloidal silver, hydroponics (test your 
nutrients), aquariums, RO/DI systems, pools and spas, commercial and industrial applications and more. The TDS is a rugged model that includes a protective carrying case.

water tds test pen

Founded in 2008 Hangzhou Lohand Biological Technology Co., Ltd is a national high-tech enterprise focusing on the research, development, production and sales of water quality monitoring products. Relying on the scientific research technology of Zhejiang University, The company has established R & D centers in Jianggan Science Technology Park and West Lake Science Technology Park. Lohand has developed more than 100 innovations in water quality industry  including high-precision water quality analysis instruments, Internet of Things online monitoring equipment, electrochemical sensors, rapid diagnostic reagents, and test strips. The product has dozens of national patents.The company is a pioneer in the rapid monitoring industry of domestic water quality.
The company currently has more than 200 people, including nearly 40 R & D personnel, and more than 15 people have intermediate and senior professional and technical titles. The business has covered the whole country, exported to Europe, America, Asia, Africa, Japan and other countries, and gradually established a global operation and service network.
The company has always been adhering to the business philosophy of "focusing on quality and continuously innovating and creating value for customers". With ISO9001 standardized production, intensive management, strong technical force and perfect after-sales service, opening a new course in the water quality inspection industry.

water tds test pen

About us

Multi-parameter water quality analyzer series

Outdoor multiple in one meter

COD reactor

Multi-parameter portable water quality detector

Water sample heating thermostat

Fluorescent dissolved oxygen electrode

Pen type salinometer

Residual chlorine electrode

Portable water quality analyzer

DO dissolved oxygen meter

Digital refractometer

Rapid detection series

Color comparison tube series

water tds test pen

1.How can I get a sample ? What’s the sample fee? Is it refundable ?

Answer: Please confirm with us the model you’ll purchase, and you prepaid the sample fee , after sample tested and qualified, we will refund this sample fee when you place the bulk order. We can send out the sample within 2 working days after receiving payment.

2.What’s the lead-time ?

Answer: Normally it takes 3-5 working days after receiving payment.

3. Can you do OEM service ?

Answer: We can provide the specific products needed around the world at significantly lower costs.Lohand also offers a Private Labeling Program to provide high quality lab supplies at lower prices.If you need further information regarding our OEM or Private Label programs, please contact us freely.

4.Can we buy 1 pc for sample testing?

Answer:Yes, we are glad to send 1pc for quality testing if we have stock of the model you required.

5.What is the payment method?

Answer:Western union, TT, Moneygram, Paypal, L/C, D/A, D/P etc.

water tds test pen

1. Are you trading company or manufacturer ?

A: We are factory.

2. What services can we get from your company?

Superior products(peculiar design,strict quality control); Factory direct sale(favorable and competitive price); Excellent services(delivery goods on time;one year warranty;post and after services); Professional business consultation.

3. What’s the lead-time ?

Normally it takes 3-5 working days after receiving payment.

4. Why choose us?

1) High quality with reasonable price.

2) High-efficiency production capacity;

3) Timely delivery;

4) Quality control.

5) Commitment to our customers.

water tds test pen

What is water conductivity and resistivity

Resistivity The conductivity of water is related to the resistance value of water. Large resistance value, poor conductivity, low resistance value, and good conductivity. According to Ohm's law, at a certain temperature, the resistance value R of water is inversely proportional to the vertical cross-sectional area F of the electrode and proportional to the distance L between the electrodes: R = ρ & # 183; L / F where ρ is Resistivity, or specific resistance. The unit of resistance is ohm (ohm, code Ω), or microohm (μΩ), the international unit (SI) unit of 1Ω equal to 106μΩ resistivity is ohm (Ω & # 183; M). If the cross-sectional area F of the electrode is made 1CM2, then the resistance value is equal to the resistivity. The resistivity of water is related to the amount of salt in the water, the ion concentration in the water, the charge of the ions, and the speed of the ions. Therefore, the pure hydroelectric rate is very large, and the ultra pure water resistivity is even greater. The purer the water, the greater the resistivity. Conductivity Due to the presence of various dissolved salts in water, it exists in the form of ions. When a pair of electrodes is inserted in water, after being energized, the charged ions will move in a certain direction under the action of an electric field. The degree of strength of water's electrical conductivity is called the conductivity S (or conductance). Electrical conductivity reflects the amount of salt in the water and is an important indicator of the purity of the water. The purer the water, the less the salt content, the greater the resistance and the smaller the conductivity. Ultrapure water can hardly conduct electricity. The magnitude of the conductance is equal to the inverse of the resistance, ie: S = 1 / R

water tds test pen

ADD: Zhejiang Hangzhou Jianggan 4F, Bldg 7, No.63, Jiuhuan Rd, Jiubao Town, Jianggan Dist
TEL: +86-571-85050999
MOBILE: +8613123950066


E-MAIL: info@lohand.net

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