SKU: SENS-0367
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Generic Analog TDS Sensor Module - 0-2.3V Output, Waterproof Probe

₹479.00 (Inclusive of all taxes)
Out of Stock

This analog TDS sensor module provides a 0-2.3V output signal for measuring water purity, compatible with 3.3V and 5V systems like Arduino and Raspberry Pi. Its waterproof probe is designed for long-term immersion in aqueous solutions.

Features

  • 0-1000 ppm TDS measurement range with ±10% full-scale accuracy.
  • 0-2.3V analog output compatible with 3.3V and 5V microcontroller ADCs.
  • Wide 3.3-5.5V DC operating voltage for flexible system integration.
  • AC excitation source prevents electrode polarization for stable readings.
  • IP68-equivalent waterproof probe for continuous immersion applications.

Out of stock

Description

This TDS sensor module is engineered for monitoring total dissolved solids in water, a key indicator of purity. It employs a conductivity-based sensing principle where an AC excitation signal is applied to the probe’s electrodes to measure solution conductivity, which is then correlated to TDS concentration. This AC method prevents DC polarization, ensuring long-term measurement stability and extending the probe’s operational lifespan.

The module outputs a linear 0-2.3V analog signal corresponding to the 0-1000 ppm range, making it directly interfaceable with the analog inputs of most microcontrollers and data acquisition systems. Its low operating current of approximately 3 mA makes it suitable for battery-powered monitoring stations. The encapsulated probe is fully submersible, constructed for durable use in various aqueous environments.

Key Features

  • Analog output interface for straightforward integration with ADC channels.
  • AC excitation circuitry enhances signal stability and sensor longevity.
  • Compact PCB design (42mm x 32mm) with standard 3-pin connector for plug-and-play use.
  • Designed for compatibility with popular development platforms like Arduino and ESP32.
  • Waterproof probe construction allows for permanent installation in tanks, pipes, or hydroponic systems.
  • High-value build optimized for educational, hobbyist, and light industrial monitoring projects.

Applications

  • Drinking water and reverse osmosis (RO) system purity monitoring.
  • Nutrient concentration measurement in hydroponic and aquaponic systems.
  • Water quality assessment in aquariums, fish farms, and environmental monitoring stations.
  • DIY water quality meters and educational science projects.
  • Preventive maintenance checks for cooling towers and boiler feed water.

Technical Specifications

Model / NameTDS Sensor Module
Operating Voltage3.3 - 5.5 VDC
Operating Current~3 mA
Output Signal0 - 2.3V Analog
Measurement Range0 - 1000 ppm (TDS)
Measurement Accuracy±10% F.S.
Excitation SourceAC Signal
Probe ProtectionWaterproof (for immersion)
Module Dimensions (LxW)42 x 32 mm
Module Weight~60 g

Frequently Asked Questions

What is the output signal of this TDS sensor and how do I connect it to an Arduino?

The module provides a 0-2.3V analog output signal. Connect the module's VCC to Arduino's 5V, GND to GND, and the signal (S) pin to an analog input pin (e.g., A0). The voltage read can be converted to a TDS value in ppm using a provided formula or library.

Can the probe be left submerged in water permanently?

Yes, the probe is designed with waterproof encapsulation suitable for long-term immersion. For permanent installations, ensure the cable entry point is properly sealed and the module itself is kept in a dry enclosure, as only the probe is submersible.

What is the purpose of the AC excitation source mentioned in the specs?

The AC (alternating current) excitation signal prevents polarization, a phenomenon where ions accumulate on the electrode surfaces under DC current, which would lead to measurement drift and degrade sensor accuracy over time. This design ensures stable, repeatable readings.

Is calibration required, and how is it performed?

For accurate readings, a one-point calibration using a standard TDS solution is recommended. The process typically involves immersing the probe in the calibration solution and adjusting the code's conversion factor until the module reports the correct known ppm value.

What microcontrollers or systems is this module compatible with?

It is directly compatible with any 3.3V or 5V logic system featuring an analog-to-digital converter (ADC), including Arduino (Uno, Mega, Nano), ESP32, ESP8266 (with ADC), Raspberry Pi (requires external ADC), and many industrial PLCs with analog input modules.

Package Includes

  • 1 x Analog TDS Sensor Module
  • 1 x Waterproof TDS Probe

Additional Information

Weight 0.06 kg
Dimensions 4.2 × 3.2 cm