Analog TDS (Total Dissolved Solids) Sensor Meter Kit

This is an Arduino-compatible TDS Sensor/Meter Kit designed for measuring the TDS value of water to reflect its cleanliness. It can be applied in domestic water systems, hydroponics, aquaculture, and various water quality testing applications. You may also explore the Liquid Sensor Selection Guide to get better familiar with our full range of liquid sensors.

What is TDS?

TDS (Total Dissolved Solids) indicates how many milligrams of soluble solids are dissolved in one liter of water. In general, the higher the TDS value, the more impurities the water contains, and the lower the water quality. Therefore, the TDS value serves as an important reference for evaluating water cleanliness.

Why This Kit?

While handheld TDS pens are affordable and simple to use, they cannot transmit data for real-time monitoring or integration into automated systems. On the other hand, professional-grade instruments offer excellent accuracy and data transmission capabilities—but at a much higher cost.

This Analog TDS Sensor Kit bridges that gap:

• Compatible with Arduino for easy integration

• Plug-and-play design for fast setup

• Ideal for DIY or low-cost monitoring solutions

• Enables real-time TDS monitoring and data collection

Features:

• ✅ Wide Voltage Input: 3.3V ~ 5.5V

• ✅ Good Compatibility Output: 0 ~ 2.3V analog signal, compatible with 5V or 3.3V controllers

• ✅ AC Excitation Source: Prevents probe polarization, improves accuracy and lifespan

• ✅ Waterproof Probe: Suitable for long-term water immersion

• ✅ Easy to Use: Arduino-compatible, plug-and-play with simple connections—no soldering required

• ✅ TDS Measurement Range: 0 ~ 1000 ppm

Specifications

📟 Signal Transmitter Board:

• Input Voltage: 3.3 ~ 5.5V

• Output Voltage: 0 ~ 2.3V

• Working Current: 3 ~ 6mA

• TDS Measurement Range: 0 ~ 1000 ppm

• TDS Measurement Accuracy: ±10% F.S. (at 25°C)

• Module Size: 42mm x 32mm

• Module Interface: PH2.0-3P

• Electrode Interface: XH2.54-2P

🌊 TDS Probe:

• Number of Needles: 2

• Total Length: 83cm

• Connection Interface: XH2.54-2P

• Color: Black

• Other: Waterproof probe for continuous immersion

Applications:

• Water purification systems

• Hydroponic farms

• Aquariums and aquaculture

• Environmental monitoring

• Science & education experiments

Package Includes:

• 1x TDS Sensor Probe (waterproof)

• 1x Signal Transmitter Board

• 1x Set of Connecting Cables

Important Notes:

• Do not use the probe in water temperatures above 55°C.

• Keep the probe away from the edge of containers to avoid inaccurate readings.

• Only the probe head and cable are waterproof—the connector and signal transmitter board are not waterproof and must be kept dry.