Question 1

What is your minimum order quantity (MOQ)? Can I order samples?

Accepted Answer

There is no minimum order quantity for our standard products. You can order a single unit for evaluation or purchase in bulk.

Question 2

Are you a manufacturer or a trading company?

Accepted Answer

We are a manufacturer specializing in the research, development, and production of measuring instruments since 2008. We offer a wide range of instruments for industrial testing applications.

Question 3

How do you ensure product quality? Can you provide certificates?

Accepted Answer

Our instruments undergo quality inspections before shipment. Inspection reports and third-party calibration or testing certificates may be available upon request. Please contact us to confirm availability and any additional fees.

Question 4

What is your warranty and after-sales service policy?

Accepted Answer

Our instruments come with a 12-month warranty. We provide technical support and offer paid repair services after the warranty period.

Question 5

What are your payment methods, delivery terms, and lead times?

Accepted Answer

We accept payments in USD and CNY via T/T or Western Union. Our standard delivery terms include EXW and DAP. Lead times depend on product availability and order quantity. Please contact us for details.

Question 6

Do you offer OEM or customized products?

Accepted Answer

Yes, we offer OEM and customization services. Please contact us with your specific requirements to discuss available options.

Question 7

Are import duties and taxes included in the price?

Accepted Answer

Import duties and taxes depend on the destination country's regulations and are generally not included in the product price. We can provide the HS code for reference. Please consult your local customs authority for applicable charges.

Question 8

What are the key specifications of the LS311?

Accepted Answer

Parameters COD, TOC, UV275, TDS, EC, SAL, GH, S.G. and temperature, ranges COD 0 to 100 mg per litre, TDS 0 to 2000 ppm and salinity 0 to 26 percent, resolution 0.01 mg per litre for COD, 1 ppm for TDS and 0.01 percent for salinity, accuracy within +/-0.5 mg per litre below 5 mg per litre and +/-10 percent above, IP67 probe, and a TFT colour screen.

Question 9

How does the water quality score work?

Accepted Answer

The instrument compares the measured values with the limits of the Chinese drinking water standard and converts them into a score, shown as excellent, good, average or poor, with a matching backlight colour of blue, green, yellow or red. It is a screening aid for non specialists, not a substitute for a certified laboratory analysis.

Question 10

Where is the LS311 commonly used?

Accepted Answer

It is used for seawater and brackish water monitoring, aquaculture ponds, shrimp and fish farms and salt water pools. It also covers the normal drinking water parameters when a single instrument has to do both jobs.

Question 11

How do I measure salinity in an aquaculture pond?

Accepted Answer

Take a sample from below the surface away from the feeding area, let it reach ambient temperature, immerse the probe fully and wait for the reading to settle. Measure at the same depth and time of day as before, because rain and evaporation change the surface salinity.

Question 12

Which parameters does the tester measure and why these ones?

Accepted Answer

It measures COD, TOC, UV275 absorbance, TDS, electrical conductivity and temperature without any reagent. COD and TOC indicate organic pollution, UV275 rises with residual chlorine and organic matter, TDS and conductivity indicate dissolved solids, and temperature is needed for compensation. Together they describe the overall quality of drinking water quickly.

Question 13

Is the reading affected by water temperature?

Accepted Answer

Yes. Conductivity and TDS change strongly with temperature, so the instrument measures the water temperature and compensates the values, normally to 25 DegC. Let the sample reach room temperature and immerse the probe fully, then wait for the reading to stabilise before recording.

Question 14

How does the LS311 differ from the LS310?

Accepted Answer

The LS311 adds salinity, general hardness and specific gravity to the six parameters of the LS310, which extends the range from drinking water to seawater and aquaculture. The optical and TDS channels are the same on both instruments.

Question 15

Does the tester need reagents or consumables?

Accepted Answer

No reagents and no consumables are required. The measurement is optical and electrical, so the running cost is essentially zero and there is no chemical waste to dispose of. This is the main advantage over a colorimetric test kit for routine screening.

Product profile

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Type

Measurement Object

Measurement Parameters

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Resolution

Cod Accuracy (H=Standard)

Toc Accuracy (H=Standard)

UV275 Accuracy (H=Standard)

TDS Accuracy (H=Standard)

Ec Accuracy (H=Standard)

Sal Accuracy (H=Standard)

Temperature Accuracy (H=Standard)

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Weight

Working Temperature Range

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HS Code

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About Our Factory & Business Background

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Our Industry Experience & Global Business Record

Our Certifications, Standards & Industry Recognition

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