LS311 Multi Parameter Water Quality Tester for Drinking Water COD TDS Conductivity Saltness Hardness Aquaculture Sea Water Test

$61.33

Includes all taxes

Color

LS311

Ship from

China

Ship to

By shipping method

Meet your Seller

$61.33

Sold by BILLIONS BIRDS

Delivery options

Ship Only

Description

The LS311 water quality tester measures COD, TOC, UV275, TDS, conductivity, salinity, hardness, and specific gravity. Ideal for tap water, purified water, groundwater, seawater, aquariums, and aquaculture. For drinking water, it gives an intelligent score and shows water quality in four color-coded levels: Excellent, Good, Fair, and Poor.
Please use distilled water or medical distilled water for calibration. Do not Use Mineral Water for calibration

Features

1. It works for tap water, wells, lakes, aquariums, and seawater.

2. Measure multiple parameters including COD, TOC, TDS, and salinity for detailed water quality analysis.

3. The device automatically switches to salinity mode when saltwater is detected.

4. You can instantly check salinity, specific gravity, and temperature.

5. Water quality is displayed in four color-coded levels for easy interpretation.

6. It has high accuracy and meets authoritative metrology standards.

7. It provides a comprehensive assessment by detecting bacteria, viruses, and pesticide residues.

Application

Drinking water/ aquarium water/ aquaculture water/ seawater

Suitable for any water quality inspection

The drinking water tester lets you check the water quality and salinity of water at home, wells, lakes, and aquariums.

4 grades water quality scores

Intuitive 4-color display lets you instantly see the quality of your water.

Water quality scoring standards

According to “GB 5749-2002 Standards for drinking water quality”

Intelligent saltwater detection

Switch to salinity display when saltwater is detected.

Not only TDS

Assess water quality and salinity in detail with multiple parameters: COD, TOC, TDS, and salinity.

Note:

Common water hardness conversion: 1 °dH = 17.8 ppm; 1 ppm = 1 mg/L

According to China standard “Standards for Drinking Water Hygiene” (GB 5749-2022), the hardness of drinking water should be ≤ 450 mg/L

Measure Salinity, Specific Gravity, Temperature

Instantly check salinity, SG & temperature — perfect for seawater, fish tanks, and aquaculture.

High accuracy

The water quality tester can pass the authoritative metrology institute inspection

Linshang LS311 high quality water tds tester more comprehensive

Bacteria, viruses and pesticide residues all reflect

Measurement results:

LS311 high quality water tds tester: Poor water quality

TDS: Unable to detect bacteria and pesticides

TOC (mg/L) total organic carbon

Carbon is the common component of all organic matter, the main element of organic matter, the higher the TOC value of water, the higher the organic content of water, total carbon is an indicator to evaluate the organic pollution of water quality.

COD (mg / L) chemical oxygen demand

Measure the amount of reducing substances that need to be oxidized in the water sample, a comprehensive reflection of the degree of organic pollution of the water, the lower the value indicates that the water is polluted by organic pollutants, the lower the degree of pollution

UV254 (au/cm) ultraviolet absorption value

The absorbance of some organic matter in water at 254nm wavelength, reflecting the number of various types of macromolecular organic compounds in water

EC (au/cm) electrical conductivity

Theoretically H2O non-conductive liquid in the more charged substances the greater the conductivity of the liquid, commonly used in various industries to measure the concentration of the solution

TEM (℃) temperature

Measure the temperature change of water

TDS (ppm) total dissolved solids

The total amount of various ionic molecules and compounds dissolved in water, the higher the TDS value, the more dissolved substances contained in the water.

SAL(%)Salinity

Indicates the concentration of dissolved salts. Higher conductivity corresponds to higher salinity.

GH(ppm) General Hardness

Determined by calcium (Ca²⁺) and magnesium (Mg²⁺) ion levels; more ions result in higher hardness.

S.G.(Specific Gravity)

Ratio of a solution’s density to water; useful in wastewater treatment and desalination to monitor concentration levels.

1. Water Quality Tester *1

2. User Manual *1

3. Carrying case*1

Note

Please allow 1-2cm measuring deviation due to manual measurement.

Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures.

Shop Policies

Payment Policy

Payment Policy – BILLIONS BIRDS

At BILLIONS BIRDS, we are committed to providing a safe, secure, and seamless payment experience for our customers.

1. Accepted Payment Methods

We accept the following payment options:

Major Credit & Debit Cards (Visa, MasterCard, American Express)

Secure Online Payment Gateways (such as PayPal, Stripe, or other providers available at checkout)

Any additional payment methods displayed during checkout

All payments must be completed in full at the time of purchase.

2. Secure Transactions

All transactions are processed through encrypted and secure payment systems to protect your personal and financial information. We do not store your full payment details on our servers.

3. Currency

Prices are displayed in the currency indicated on the website. If you are purchasing from another country, your bank may apply currency conversion fees.

4. Order Confirmation

Once your payment has been successfully processed, you will receive an order confirmation email containing your purchase details.

5. Failed or Declined Payments

If your payment is declined, please verify your billing information or contact your bank. Orders will only be processed after successful payment confirmation.

6. Fraud Prevention

BILLIONS BIRDS reserves the right to cancel or refuse any order if fraud or unauthorised activity is suspected.

Delivery Policy

Delivery Policy – BILLIONS BIRDS

At BILLIONS BIRDS, we are dedicated to delivering your orders safely and efficiently.

1. Order Processing

All orders are processed within 1–3 business days after payment confirmation. Orders are not processed or shipped on weekends or public holidays.

2. Shipping Times

Estimated delivery times vary depending on your location:

Domestic Shipping: 3–7 business days

International Shipping: 7–15 business days

Please note that delivery times are estimates and may vary due to customs procedures, carrier delays, weather conditions, or other unforeseen circumstances.

3. Shipping Costs

Shipping fees are calculated at checkout based on your location and selected shipping method. Any customs duties, taxes, or import fees are the customer's responsibility.

4. Tracking Information

Once your order has been shipped, you will receive a confirmation email with tracking details (if available) so you can monitor your package.

5. Delivery Issues

If your order is delayed, lost, or arrives damaged, please contact us within 7 days of the expected delivery date. We will work with the shipping carrier to resolve the issue as quickly as possible.

6. Incorrect Shipping Information

Customers are responsible for providing accurate shipping details at checkout. BILLIONS BIRDS is not responsible for orders shipped to incorrect addresses provided by the customer.

Refund Policy

Refund Policy – BILLIONS BIRDS

At BILLIONS BIRDS, customer satisfaction is our top priority. If you are not completely satisfied with your purchase, we’re here to help.

1. Return Eligibility

You may request a return within 14 days of receiving your order. To qualify for a return:

The item must be unused, unworn, and in the same condition as received.

The item must be in its original packaging.

Proof of purchase (order confirmation or receipt) is required.

Certain items may not be eligible for return, including clearance items, gift cards, or personalised/custom products.

2. Non-Refundable Items

The following items are non-refundable:

Final sale or discounted items

Gift cards

Items damaged due to misuse, negligence, or improper care

3. Return Process

To initiate a return, please contact our customer support team with your order number and reason for return. If your return is approved, you will receive instructions for returning the item.

Unless the item is defective or incorrect, customers are responsible for return shipping costs.

4. Refund Processing

Once we receive and inspect your returned item:

We will notify you of the approval or rejection of your refund.

If approved, the refund will be issued to your original payment method within 5–10 business days.

Please note that banks or payment providers may require additional time to process refunds.

5. Damaged or Incorrect Items

If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery and provide clear photos of the product and packaging. We will arrange a replacement or full refund at no additional cost.

6. Late or Missing Refunds

If you have not received your refund:

Check your bank account again.

Contact your credit card company or payment provider.

If the issue persists, don't hesitate to contact our support team for assistance.