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TDS Sensor คือเซนเซอร์ที่ใช้ในการแสดงปริมาณสารที่ละลายอยู่ในสารละลาย ส่วนใหญ่จะใช้กับน้ำ เนื่องจากของแข็งที่แตกตัวเป็นไอออนที่ละลายในน้ำ เช่นแร่ธาตุ นั้นเปลี่ยนแปลงการนำไฟฟ้าของสารละลาย ทำให้ TDS Meter วัดค่าการนำไฟฟ้าของสารละลายและให้ค่าออกมาเป็นระดับแรงดัน 
 
ค่า TDS ที่ต่ำกว่า 200ppm นั้นดี และ 100ppm ถือว่ายอดเยี่ยม เมื่อระดับ TDS ต่ำกว่าระดับนี้ (แร่ธาตุถูกกำจัดออกไป) น้ำจะมีค่า pH ต่ำ และกลายเป็นกรดมากขึ้น ทำให้เกิดความแตกต่างที่เห็นได้ชัดเจนในรสชาติของน้ำ ระดับ TDS มากกว่า 400ppm ไม่สามารถดื่มได้


     This is an Arduino-compatible TDS sensor/Meter Kit for measuring TDS value of the water, to reflect the cleanliness of the water. It can be applied to domestic water, hydroponic and other fields of water quality testing. You may also check Liquid Sensor Selection Guide to get better familar with our liquid sensor series.


    TDS (Total Dissolved Solids) indicates that how many milligrams of soluble solids dissolved in one liter of water. In general, the higher the TDS value, the more soluble solids dissolved in water, and the less clean the water is. Therefore, the TDS value can be used as one of the references for reflecting the cleanliness of water.
Gravity: Analog TDS Sensor/Meter for Arduino TDS in Parts
(Cited from Google)

     TDS pen is a widely used equipment to measure TDS value. The price is affordable, and it is easy to use, but it is not able to transmit data to the control system for online monitoring to do some water quality analysis. The professional instrument has high accuracy and can send data to the control system, but the price is expensive for the ordinary people. To this end, we have launched an analog TDS sensor kit which is compatible with Arduino, plug and play, easy to use. Matching with Arduino controller, you can build a TDS detector easily to measure the TDS value of liquid.

     This product supports 3.3 ~ 5.5V wide voltage input, and 0 ~ 2.3V analog voltage output, which makes it compatible with 5V or 3.3V control system or board. The excitation source is AC signal, which can effectively prevent the probe from polarization and prolong the life of the probe, meanwhile, increase the stability of the output signal. The TDS probe is waterproof, it can be immersed in water for long time measurement.
Gravity: Analog TDS Sensor/Meter for Arduino Connection
This product can be used in water quality application, such as domestic water, hydroponics. With this product, you can easily DIY a TDS detector to reflect the cleanliness of water to protect your health.

Attention:
1.The probe can not be used in water above 55 degrees centigrade.
2.The probe can not be left too close to the edge of the container, otherwise it will affect the reading.
3.The head and the cable of the probe are waterproof, but the connector and the signal transmitter board are not waterproof. Please be careful.

FEATURES

  • Wide Voltage Input: 3.3~5.5V
  • Good Compatibility Output: 0~2.3V analog signal output, compatible with 5V or 3.3V controller
  • AC Excitation Source: effectively prevent probe from polarization
    Waterproof Probe
  • Easy to Use: Arduino compatible, simple connection, plug and play without soldering

SPECIFICATION

  • Signal Transmitter Board
  • Input Voltage: 3.3 ~ 5.5V
  • Output Voltage: 0 ~ 2.3V
  • Working Current: 3 ~ 6mA
  • TDS Measurement Range: 0 ~ 1000ppm
  • TDS Measurement Accuracy: ± 10% F.S. (25 ℃)
  • Module Size: 42 * 32mm
  • Module Interface: PH2.0-3P
  • Electrode Interface: XH2.54-2P

TDS probe

  • Number of Needle: 2
  • Total Length: 83cm
  • Connection Interface: XH2.54-2P
  • Color: Black
  • Other: Waterproof Probe

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Exchange or return policy



Every item comes with a 30-day warranty. However, there are certain conditions that apply:

  1. The customer should not be responsible for any self-inflicted damage, such as incorrect power connections (for example, supplying 5V instead of the required 3.3V for a sensor).

  2. The product must be in perfect condition, without any breakage or damage caused by electricity (e.g., short circuits leading to electrical fires).

  3. The store does not accept product exchanges due to customer misunderstandings, such as purchasing the wrong size for their project or buying something without eventually using it. Customers can inquire about the product details and ensure compatibility before making a purchase by contacting us through our Line account @modulemore during business hours. Please note that there may be delays in response between 12:00 PM and 2:00 PM.

Return Policy: To initiate a product return, customers must provide the original receipt or a copy for quick verification. Returns can be sent to our store address by following these guidelines:

  1. Provide a detailed description of the damaged item(s).
  2. Mention any tests or experiments conducted by the customer.

Please note that the store reserves the right to make the final decision regarding product replacement or refund.

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Last updatedSep 8, 2025

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Arduino compatible board, Iot, ESP32, ESP8266, Nodemcu, Raspberry pi, micro:bit and etc.
Mobile number : 0831710868
E-mail : paheyisoicus@gmail.com
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