Will this work on salt (ocean) water (not continuously submerged)?

Depends on the tds level of the water. This meter only goes up to 1000 ppm. If the water is higher than that it won’t read it correctly

Can this be left submerged permanently?

If you talk about the sensor itself, I would say yes. Depends a bit on the salinity of the fluid you are measuring. Sea water will destroy everything given enough time. Potable water should be OK.

Can i use this sensor an esp32 board? the example code is for arduino uno

Yes it works just fine with an ESP 32. the example code works as well for the esp 32

Does this come with any calibration solutions or what is recommended for calibration?

it does not. Also, it only reads up to 1000ppm, so its ok for water quality testing, but not hydroponics nutrient solution. you can buy calibration solution on amazon

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KEYESTUDIO Water Quality TDS Meter Fully Melted Solids Sensor Module for Arduino Arduino Arduino Arduino Arduino Electronic Crafts

Product ID: 744235660

⚡3.3-5.5V DC input voltage

💧Waterproof probe design

📏0-1000 ppm TDS measurement range

€ 18.24

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Description

💧 Stay ahead of impurities with precision TDS sensing!

ROBUST MOUNTABLE - Four fixed 3.2mm holes ensure secure installation on any setup
EXTENDED PROBE REACH - 32.7-inch waterproof probe lets you test water in hard-to-reach places
PRECISION WATER INSIGHT - Accurately measures TDS with ±10% accuracy for reliable purity checks
SMART IMPURITY DETECTION - Detects key ions like Ca²⁺, Mg²⁺, Na⁺, K⁺ to reveal hidden water quality issues
PLUG PLAY ARDUINO READY - Seamlessly integrates with Arduino MCU for effortless DIY water quality projects

The KEYESTUDIO Water Quality TDS Meter is a professional-grade sensor module designed for Arduino enthusiasts and water quality professionals. It measures total dissolved solids (TDS) in water from 0 to 1000 ppm with ±10% accuracy, powered by a 3.3-5.5V input and featuring a waterproof 32.7-inch probe. Its easy mounting and Arduino compatibility make it ideal for precise, real-time water purity monitoring in both DIY and industrial applications.

Specifications

ASIN	B08DGLY3J2
Amazon Bestseller	#57,407 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #48 in Lab Moisture Balances
Are Batteries Included	No
Brand	KEYESTUDIO
Customer Reviews	4.3 4.3 out of 5 stars (108)
Date First Available	May 9, 2020
Item Weight	100 g
Item dimensions W x H	50 x 30 x 80 mm
Item model number	KS0429
Manufacturer	keyes
Product Dimensions	5 x 3 x 8 cm; 100 g

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€ 18.24

Duties & taxes included

In stock

Sold byAmazon FranceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to France.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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