Can this sensor work with an ESP32 and esphome?

Hello! It can be used with ESP32 and esphome, it's just that we don't have example test code at the moment. Buyers need to have a certain ESP32 application coding foundation, test and write code by themselves.

Can the probe be fully submersed? And if so, for how long? Indefinitely?

Hi! The TDS probe and lead are made of waterproof material and can be immersed in water, but the cable interface and signal transfer board are not waterproof, please use it with caution. Please refer to the "Connections and Examples" section in the Wiki of this product below: http://www.cqrobot.wiki/index.php/TDS_(Total_Dissolved_Solids)_Meter_Sensor_SKU:_CQRSENTDS01

Is the sensor able to be plumbed into water line? a number of tds sensors will directly fit in a 1/4" push connect fitting.

Hi! The probe and lead of the TDS sensor are made of waterproof material, which can be inserted into the water pipe and installed in the 1/4" push connection fitting, but make sure that the water temperature in the water pipe does not exceed 55 degrees Celsius, because the probe cannot be used in water above 55 degrees Celsius. Please. Refer to the "Connections and Examples" section in the following Wiki of this product: http://www.cqrobot.wiki/index.php/TDS_(Total_Dissolved_Solids)_Meter_Sensor_SKU:_CQRSENTDS01

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💧 Dive into precision—measure your liquid’s purity like a pro!

WATERPROOF DURABILITY - Robust probe design built to withstand liquid immersion without compromise.
PLUG PLAY SIMPLICITY - Arduino & Raspberry Pi ready—no soldering needed, get started instantly.
POLARIZATION FREE PROBE - AC excitation source extends probe life and maintains data integrity.
UNIVERSAL VOLTAGE RANGE - Operates seamlessly from 3.3V to 5.5V, fitting diverse projects effortlessly.
PRECISION LIQUID ANALYSIS - ±10% accuracy ensures reliable TDS readings for research & education.

The CQRobotTDS Meter Sensor is a versatile, waterproof Total Dissolved Solids sensor compatible with Raspberry Pi and Arduino boards. Featuring a wide voltage input (3.3V-5.5V), analog output (0-2.3V), and AC excitation to prevent probe polarization, it delivers ±10% accuracy for reliable liquid quality analysis in scientific, educational, and DIY applications.

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TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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Manufacturer	CQRobot
Part number	CQRSENTDS01
Item Weight	50 g
Package Dimensions	10.49 x 7.19 x 1.7 cm; 50 g
Item model number	CQRSENTDS01
Style	TDS Meter Sensor
Material	PLA_(Polylactic Acid), PE_(Polyethylene)
Measurement Accuracy	Plus/Minus 10% F.S.
Specific uses	liquid quality analysis, scientific research, laboratory use, online analysis, DIY projects, educational settings
Batteries included?	No
Batteries Required?	No

CQRobot TDS (Total Dissolved Solids) Meter Sensor Compatible with Raspberry Pi/Arduino Board. for Liquid Quality Analysis Teaching, Scientific Research, Laboratory, Online Analysis, etc.

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