■ 簡介
Compact TDS measurement module for integration with microcontrollers, offering reliable ppm readings for water quality projects, filtration systems, and IoT applications.
微型 TDS 測量模組可與微控制器整合，提供可靠的 ppm 水質讀值，適用於濾水系統、IoT 與各類水質監測專案。

■ 產品介紹
The TDS module works together with a TDS probe to provide real-time dissolved solids readings. It converts the probe’s conductivity signal into a standard analog or digital output that can be directly read by controllers like Arduino, ESP32, or Raspberry Pi. This is ideal for DIY, OEM, and IoT-based water monitoring systems.
TDS 模組與 TDS 探針搭配使用，可提供即時總溶解固體讀值。模組會將探針的導電訊號轉換成標準類比或數位輸出，MCU（如 Arduino、ESP32、Raspberry Pi）即可直接讀取。非常適合 DIY、OEM 與 IoT 相關的水質監測系統。

■ 主要特點與參數

1. Input: Compatible with standard TDS probes
   輸入： 相容一般 TDS 探針
2. Output: Analog voltage (0–2.3 V), I²C, or UART depending on model
   輸出： 類比電壓（0–2.3 V）、I²C 或 UART（依型號而定）
3. Range: 0–1000 ppm (extendable to 9999 ppm with scaling)
   量測範圍： 0–1000 ppm（可依比例擴展至 9999 ppm）
4. Accuracy: ±10 ppm with proper calibration
   精度： ±10 ppm（正確校正下）
5. Operating Voltage: 3.3V / 5V for full microcontroller compatibility
   工作電壓： 3.3V / 5V，全面支援微控制器
6. Temperature Compensation: Optional NTC/PT1000 integration
   溫度補償： 可整合 NTC/PT1000

■ 應用領域
• Arduino / Raspberry Pi 水質專案
• 水耕 / 魚菜共生監測
• 智慧飲水機、濾水器
• 教育與研究實驗室
• IoT 環境監測設備

■ FAQ
Q: What’s the difference between a TDS probe and a TDS module?
A: The probe measures dissolved solids, while the module processes the signal into a readable output for controllers.
TDS 探針負責量測導電度，TDS 模組負責將訊號轉換成 MCU 可讀取的輸出。

Q: Do I need to calibrate the module?
A: Yes, calibration with standard solutions ensures accurate results.
需要，使用標準液校正可確保精準度。

Q: Can the module measure bacteria or chemicals?
A: No. Like all TDS devices, it only measures ionic conductivity. Neutral substances and pathogens are not detected.
不能。TDS 僅量測離子導電度，不偵測細菌、病毒或中性化學物質。

Q: Why does my pure RO water still show 1–2 ppm?
A: This is due to dissolved CO₂ in water, which is normal and harmless.
因為水中溶解 CO₂ 會造成 1–2 ppm，屬正常現象，並非污染。