Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Interface Type	UART/TTL Serial
Compatibility	Arduino, Raspberry Pi, ESP32, STM32
Measurement Range	0.00 to 14.00 pH
Accuracy	±0.1 pH at 25°C
Operating Voltage	3.3V - 5.5V DC
Probe Length	1.5 meters waterproof cable
Response Time	< 60 seconds
Calibration	Two-point automatic calibration
Application	Hydroponics, Aquariums, Water Treatment
Package Includes	1x PH Module, 1x PH Electrode, 1x Calibration Powder Set

6 reviews

Anonymous

Mar 31, 2026

Rating: 4/5

Good value, needs careful calibration

The hardware quality is solid for the price. It took me a few tries to get the calibration right, but once set, it holds the value well. The waterproof probe is a nice touch for aquarium monitoring.

Anonymous

Mar 30, 2026

Rating: 5/5

Exceeded expectations

I was skeptical about the accuracy at this price point, but it performs admirably. The temperature compensation feature works well, and the build quality feels professional. Will buy again.

Anonymous

Mar 28, 2026

Rating: 5/5

Great for student projects

We bought ten of these for our university lab. They are robust enough for students to handle and the documentation provided made coding the Arduino sketch very straightforward. No issues so far.

Anonymous

Mar 11, 2026

Rating: 3/5

Works but instructions could be better

The sensor itself works fine once you figure it out, but the included manual is a bit vague on the calibration powder mixing ratios. Had to look up a video tutorial to get started. Otherwise, it does the job.

Anonymous

Mar 05, 2026

Rating: 5/5

Perfect for my hydroponic setup

This sensor module integrated seamlessly with my ESP32 controller. The serial output is stable, and the readings match my handheld meter almost perfectly after a quick two-point calibration. Highly recommended for DIY IoT projects.

Anonymous

Mar 01, 2026

Rating: 4/5

Reliable data transmission

Using this for remote monitoring via LoRaWAN. The serial communication is clean with minimal noise. I deducted one star because the BNC connector feels slightly loose, but it hasn't affected performance yet.

5 FAQ

Q: What calibration buffers are included in the box?

A: The package includes powder sachets for preparing pH 4.01 and pH 6.86 standard buffer solutions. You will need distilled water to mix them according to the instructions.

Q: How often does the probe need to be recalibrated?

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

Q: Does this module support 3.3V logic levels for ESP8266?

A: Yes, the module operates on a wide voltage range of 3.3V to 5.5V, making it fully compatible with both 3.3V and 5V microcontrollers like the ESP8266 and standard Arduino boards.

Q: Can I read the data using Python on a Raspberry Pi?

A: Absolutely. Since the module outputs data via UART/TTL serial, you can easily read the values using Python's pyserial library by connecting the TX/RX pins to the Pi's GPIO header.

Q: Is the probe submersible for long-term deployment?

A: Yes, the electrode head is designed to be submerged continuously. However, the BNC connector and the cable junction should remain above water to prevent corrosion and signal interference.

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