Product details Product Specification Measures from 0-9990ppm Accuracy:+-2%, Battery: 2x1.5V(Button Cell) Size:155x31x23mm(6.1X1.2x0.9in) Use the TDS Meter to: Check the performance of your water filter Check for the hardness (1 grain=17ppm) Make sure you always drink pure water. Features Hold function saves the measurements for convenient reading and recording. Auto-off function:turns off meter after 10 minutes of non-use to conserve batteries. Dual Range: Measures from 0-999ppm,with a resolution of 1 ppm. From 1000 to 9990ppm,the resolution is 10ppm, indicated by drinking x 10 symbol,Factory calibrated. Advantages: Taking Temperature Measurement 1.Once the meter is on,the temperature function can be used at any time, in or out of liquid. 2.Press the TEMP button.The display will switch to temperature(in Celsius only). 3.To return to TDS mode,press the TEMP button. Precaution and notes Do not drop the entire TDS meter in water or dip beyond the maximum immersion level.This unit is not covered under the warranty if water enters the unit. 2. Do not store the TDS meter under high temperature or direct sunlight.This will shorten the life-span of the product and potentially avoid the warranty. 3. The TDS-3 meter is calibrated at 642ppm. It is recommended that the calibration level should be the similar to the sample to be tested.If you are testing higher ppm(member,water quality association). Calibration Your meter has been factory calibrated well. warranty 1.Three year warranty: The product is warranted to the purchaser against material and workmanship for three(3) years from date of purchase. What is covered: Parts and labor , or replacement at the companyâ??s option. Transportation charges to the purchaser. What is not covered: Transportation charges to the company. Damages from the abuse or improper maintenance (see operating instructions and precautions). Any other consequential damages, incidental damages ,or incidental expenses,including damages to the property.Some states do not allow exclusive or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. FAQ Question 1: What is the MOQ of this item ? Answer: The item MOQ is 5000pcs. Question 2: How to pack this item? Answer: Box packing is our usual practice, you can also send us your packing design, and we can packing as your requirement. Question 3: How to make payment? Answer: You can make payment by T/T,Paypal.Western Union and of course cash face to face at our factory. Question 4: What is the lead time? Answer: Our lead time is within 10 days after receive your payment based on MOQ:5000PCS. Question 5: Can you accept OEM & ODM? Answer: Yes, we can accept OEM &ODM -