Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Microcontroller	STM32F103C8T6
Detection Range	0 - 1000 ppm
Operating Voltage	3.3V - 5V DC
Output Signal	Analog Voltage (0-3V)
Probe Length	85 mm
Interface Type	PH2.0-3Pin
Accuracy	+/- 10% F.S.
Response Time	< 30 seconds
Working Temperature	0°C to 50°C
Application	Hydroponics, Aquariums, Water Purifiers

6 reviews

Anonymous

Mar 18, 2026

Rating: 5/5

Accurate and fast response

Tested against a handheld commercial TDS meter, and the results were within 5% after calibration. The response time is quick, updating every few seconds. Great addition to my smart home water monitoring system.

Anonymous

Mar 15, 2026

Rating: 4/5

Solid build quality

We bought five of these for our workshop. They have held up well in continuous immersion tests. The only minor issue is the cable length could be a bit longer for larger tanks, but otherwise excellent.

Anonymous

Mar 10, 2026

Rating: 3/5

Works but documentation is sparse

The sensor works as advertised, but finding detailed calibration code specifically for the STM32 version took some digging. If you know how to write your own drivers, this is a great module. Beginners might struggle slightly.

Anonymous

Mar 10, 2026

Rating: 5/5

Perfect for my hydroponic setup

This STM32 module is incredibly stable compared to the Arduino-based ones I used before. The readings are consistent, and the probe seems well-built. Integration with my ESP32 controller was straightforward using the provided library examples.

Anonymous

Mar 10, 2026

Rating: 5/5

Robust STM32 core

I appreciate that this uses an STM32 chip instead of a basic op-amp circuit. It handles noise much better. The analog output is smooth, and the probe connector feels secure. Highly recommended for serious projects.

Anonymous

Mar 07, 2026

Rating: 4/5

Good value, needs calibration

The hardware quality is solid for the price. Just remember that you must calibrate it with standard solutions before getting accurate ppm readings. Once calibrated, it tracks changes in my aquarium water very well.

5 FAQ

Q: How often does the sensor need recalibration?

A: For optimal accuracy, we recommend recalibrating the sensor every 2 to 4 weeks depending on usage frequency and the stability of the water environment being monitored.

Q: Is this module compatible with 5V Arduino boards?

A: Yes, the module operates on 3.3V to 5V. However, since the analog output is 0-3V, it is safe to connect directly to Arduino analog pins. For best accuracy with 5V logic, ensure your ADC reference is set correctly.

Q: Does the package include calibration powder or solution?

A: No, the package includes only the sensor module and probe. Calibration solutions (usually 342ppm or 1413us/cm) must be purchased separately to ensure accurate TDS readings.

Q: What is the thread size for mounting the probe?

A: The probe features a standard G1/2 inch thread, making it compatible with most common pipe fittings and bulkhead connectors used in plumbing and hydroponics.

Q: Can this probe be submerged indefinitely?

A: The probe tip is designed for continuous submersion in water. However, the electronic module board itself is not waterproof and should be kept dry outside the tank.

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