10 Best Sutro Pool Monitor of 2025

Tested and Reviewed: Top 10 Sutro Pool Monitor deals with expert ratings from 8.1 to a perfect 10

March 2026 Edition

Editor's Choice

9.7

MAV AquaDoc

Eagle Ray Digital Spa Water Test Kit by AquaDoc with Digital Water Tester and 30 hot tub Test Strips for Chlorine, Bromine, Total Hardness, Cyanuric Acid, Alkalinity, and pH

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Editor's bottom line:

“This sutro pool monitor is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Digital Hot Tub Water Testing Kit - Stop guessing with traditional strips. Insert a test strip into the Eagle Ray digital hot tub test kit and receive clear numerical results to help balance your hot tub water with confidence.
Tests 7 Essential Spa Parameters - Measures Total Chlorine, Free Chlorine, Bromine, Total Hardness, Cyanuric Acid, Total Alkalinity, and pH. Includes 30 spa test strips, designed for accurate water testing.
Fast Testing and Tracks Water Over Time - Insert a strip into the digital analyzer for clear numerical results in seconds. Stores up to 100 readings so you can monitor changes and maintain balanced hot tub water.
Built by a Spa and Pool Chemical Brand - Developed by AquaDoc, a trusted name in water care. This digital hot tub water test kit is designed for everyday spa owners, to support proper water balance and routine maintenance.
High-tech water monitors with complicated apps sound amazing, but when you look at their track record for delivering results, you'll find they often leave you with an incorrect analysis. Our digital spa test kit cuts out the fluff and delivers reliable results.

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Picked by 397 people today

9.5

AIPER

AIPER HydroComm Smart Pool Monitor, 24/7 Automatic Water Testing for Pools, Hot Tubs & Spas, 5-in-1 Accurate Digital Tester, App Control, Customized Optimization Tips, White

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Main Highlights

Automatic Hourly Monitoring: Automatically tests your pool water every hour for continuous day-and-night monitoring. Generates clear water quality summaries and detailed reports, helping you stay informed and maintain balanced water with less routine effort
5-in-1 Water Analysis: Measures pH, ORP, TDS, EC, and Temp in one integrated pool test, delivering a complete snapshot of your pool water. Provides data-based adjustment insights to support consistent water balance and a more comfortable swimming environment
WiFi App Remote Control: Connects to your home WiFi for convenient app control and remote access. Check real-time readings, review updates, and monitor key parameters whether youre poolside or away, giving you greater flexibility in daily pool care
Accurate Real-Time Readings: Built with advanced sensing technology for consistent performance and fast response. Delivers reliable, up-to-date pool water readings so you can quickly understand changing water conditions and make timely maintenance decisions
Historical Data & Trend Insights: Automatically records past pool test readings and displays visual trend charts within the app. Track changes over time, evaluate maintenance results, and gain deeper insight into how your pool water responds to adjustments
Dual Charging Power System: HydroComm smart pool monitor provides up to 15 days of battery life per full charge. Integrated solar panel supports ongoing operation in sunny conditions, and AC power can be used as an alternative charging option when needed
2-Year Limited Warranty: HydroComm offers trustworthy, accurate, and stable monitoring, making pool care simpler than ever. With a 2-year warranty included, you can enjoy stress-free water testing season after season.

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9.5

WaterGuru

WaterGuru Sense S2 Smart Pool Monitor – Digital Pool & Spa Water Tester for Chlorine, pH, CYA & Alkalinity – Wi-Fi Enabled – Includes C5 Cassette, Float Ring & Batteries

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Main Highlights

Exclusive Compatibility The WaterGuru SENSE S2 works exclusively with two cassette options: the C5 Cassette (included with purchase) and the C2 Cassette. The C5 Cassette lasts 1 month with daily measurements, while the C2 Cassette lasts 2 months with daily measurements.
Fits Most Skimmers Adapters Available if Needed! WaterGuru SENSE S2 fits round skimmers between 8.25 and 9.4 without an adapter. For 10 square skimmers, use the WaterGuru Square Adapter. For round skimmers larger than 9.4, use the WaterGuru Circle Adapter. Both adapters are sold separately.
Easy Installation Drop the device into your skimmer for fast setup. No test strips required. Step-by-step guides, FAQs, and troubleshooting are available in the WaterGuru App.
Wi-Fi Setup Guidance Connects to your home Wi-Fi for automatic daily readings. For best performance, ensure the device is within 30 ft of your router or mesh node. If you experience connection issues, go to Your Orders, select your WaterGuru SENSE S2, and choose Get Product Support for assistance.
Manufacturer Support Program Every customer has direct access to our US-based support team for help with setup, connectivity, or readings. For support, go to to Your Orders, select your WaterGuru SENSE S2, and choose Get Product Support for assistance.
Reliable Pool & Spa Testing Measures five key water parameters daily: pH, free chlorine, cyanuric acid (CYA), total alkalinity, and hardness. Helps maintain balanced, clear water for safe swimming.

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9.2

iopool

iopool Smart Water Monitor - Works for Chlorine & Bromine Pools, Hot Tubs, & Swim Spas - Gives Precise Dosage recommendations.

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Main Highlights

Compatible with Chlorine, Bromine and Active Oxygen
Not Compatible with Salt water
Real-time analysis of your pool water. iopool advises you on the precise treatments to be carried out to have a safe and clear water continuously.
Guided pool care: iopool guides you through all the steps of the maintenance process to ensure safe and clear water for you and your family. You can also receive personalized alerts based on the actions to be taken.
App: Get access to the evolution of your water over time through the history feature. Share the iopool app with your neighbor when you are on vacation!
Eco Start pack: EcO probe + Bluetooth Wi-Fi Gateway + Unlimited and complete access to the app for life

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9.0

JNW Direct

JNW 7-in-1 Pool Test Strips, 100 Quick & Accurate Test Strips for Pool Water, Spa Test Strips for Hot Tub, Chlorine Test Strips, Bromine, pH, Alkalinity, Hardness & More - Swimming Pool Test Kit

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Main Highlights

AFFORDABLE 7-IN-1 POOL TESTING KIT: Our 100 pool test strips provides an affordable, all in one pool water testing kit for various chemicals including Free Chlorine, Alkalinity, pH levels and more!
QUICK & EASY: Simplify your pool and spa testing with our easy pool testing strips. Just dip our hot tub test strips into the water for 2 seconds, wait for 30 seconds, and compare the results accurately to the provided color chart.
ACCURATE & RELIABLE: Our swimming pool test strips deliver highly precise readings, ensuring the safety and cleanliness of your pool or hot tub water. Utilize our pool strips at least twice a week for optimal maintenance.
FREE E-BOOK: Gain access to valuable insights and tips on using our pool and spa test strips and maintaining balanced chemical levels with our complimentary eBook, enhancing your pool testing experience.
TIPS FOR USAGE: Ensure the longevity and effectiveness of your pool test strips by keeping them away from moisture and light, securely closing the container after use, and using them within 90 days of opening.

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8.8

Benicci

7-in-1 Accurate Pool Test Strips - 150 Hot Tub Spa Test Strips - Quick Pool Water Testing Kit - Bromine, pH, Hardness, Alkalinity, Chlorine & Cyanuric Acid - Perfect for Any Pools, Spa, Hot tubs

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Main Highlights

POOL TEST KIT - All You Need in 1 Strip. These 7-in-1 swimming pool testing kit strips are designed to precisely measure a variety of parameters, including Free and Total Chlorine, Total Hardness, pH, Total Alkalinity, Cyanuric Acid and Free Bromine.
POOL TESTING STRIPS - A Must-Have For Pool Owners. Our pool chemical testing kit strips are highly accurate and reliable, guaranteeing a worry-free experience with your pool, jacuzzi and spa water. Keep your water healthy, clean, and enjoyable all the time.
SPA TEST STRIPS - Easier Water Maintenance - These handy pool water test kit strips are designed to help you easily maintain safe and monitor water conditions in your inground and above ground swimming pools, hot tubs, jacuzzi, or spa.
SPA TEST STRIPS FOR HOT TUB - Highly Accurate Results in Seconds. With our test strips for hot tub water, there's no need to wait. Dip the strip in water for 2 seconds, take it out, and wait for 15 seconds to get accurate results. Monitor the quality of your water any time you want!
POOL TEST STRIPS FOR ABOVE GROUND POOL - Perfect Value For Your Money. Forget about buying pH strips that burn a big hole in your wallet. With each purchase, you get 150 water quality pool strips test for regular water testing.

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8.6

GoveeLife

GoveeLife WiFi Pool Thermometer Wireless App Easy Read, Smart Digital Floating Pool Thermometer with IPX7 Waterproof, Notification Alert, Water Temperature Monitor for Swimming, Pond, Bath, Spa

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Main Highlights

Smart Remote Monitoring: With a connected 433 gateway (up to 328ft /100m), you can easily monitor your water temperature data in real time from anywhere with the App. The Wi-Fi gateway can be paired with up to 10 sensors, extending your monitoring range to any location indoor and outdoor.
More Accurate: The pool thermometer sensor can detect temperatures ranging from -4°F to 158°F, can accurately detect the temperature change of ±0.9°F, refresh speed up to 2S, double-click the internal button to switch °F/°C.
IPX7 Waterproof Protection: The GoveeLife Pool Thermometer is waterproof and can accurately measure and read temperature even when entering the water.You needn't worry about water damage to your equipment, whether it's a hot tub, pond, or aquarium.
Free Date Storage & Export: The GoveeLife pool temperature monitor supports online viewing of easy read 20-day data graphs and export of data recorded over the past 2 years. Ideal for swimming pools, paddling pools, hot tubs, fish ponds, jacuzzis, spas, etc.
Long-Lasting: The pool thermometer is powered by 2 AAA batteries, divided into standard mode and powersaving mode. Battery life is 1 year in standard mode and 3 years in powersaving mode (APP setting). When the battery is low, an alert icon appears on the screen and the app will also send a low battery notification. The product can also be linked to GoveeLife's wallsocket products to automatically turn the pool heat on and off.
Easy to Use and Install: The GoveeLife Pool Thermometer also comes with a rope to prevent the pool thermometer from floating away while taking readings! Need attention: The included orange loop rubber is replaceable to make the pool thermometer stand out on the water!
Need attention: It is better not to have obstacles between the gateway and the sub-device, otherwise it may affect the stability of signal transmission.(2.4Ghz WiFi Only)

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8.3

T TESTRUST

Pool Salt Tester - Multifunctional 5 in 1 Salinity, PH, TDS, EC, and Temperature Meter, Pool Salinity Testing Kit, Digital Salinity Tester for Swimming Pool,Saltwater, Sea Water, Aquarium

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Main Highlights

Multifunctional 5-in-1 Tester: The T TESTRUST Pool Salt Tester is designed to accurately measure salt levels in pools, aquariums, and hot tubs. It can also test pH levels and overall water quality, providing a comprehensive analysis of your water conditions.
Three Display Designs for Salinity Test: PPM + PPT + %. For Swimming Pool Salt Test : 0-9999ppm; Seawater Test: 10-200ppt (1ppt=1000ppm, when ppm figure is over 9999ppm, the meter automatically changes to ppt unit ). For Food Test : 0.01-25%. With the help of T TESTRUST pool salinity testing kit, you can effortlessly monitor the salt levels in your saltwater pool, aquarium food and so on. Ensure optimal conditions for your aquatic inhabitants by maintaining the right salinity level.
Wide Application: The T TESTRUST tester is suitable for various water environments, including swimming pools, aquariums, hot tubs, and spas. Whether you are a pool owner, aquarium enthusiast, or spa lover, this testing kit is essential for maintaining water quality and ensuring a comfortable experience.
User-Friendly Design: T TESTRUST digital water tester features a clear LCD screen and simple button controls for easy operation. The compact size and portable design make it convenient to carry and use wherever you need to test your water.
Comprehensive Water Testing Kit: The T TESTRUST pool salt tester is a versatile 5-in-1 water testing kit that measures Salinity, PH, TDS (Total Dissolved Solids), EC (Electrical Conductivity) and temperature, providing accurate and reliable results for your pool or aquatic environment.

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8.1

Yewhick

Yewhick Smart Pool Monitor with Gateway, Profession Salt Water Pool Testing kit for Swimming Pool, 7 in 1 Chlorine Salinity ORP Monitor for Aquarium Sodium Chloride Swimming Pools Hot Tub Spas

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Main Highlights

Comprehensive 7-in-1 Smart Pool Monitor: Equipped with an advanced detection head, the Yewhick digital pool water tester measurements of chlorine ,pH, SALT, ORP, EC, TDS, and temperature. This all-in-one solution ensures a safer, healthier, and perfectly balanced pool. We have also thoughtfully prepared a gateway for you, so that you can be the first to pair wifi, and quickly enjoy the intelligent pool value detection.
Salt Tester for Saltwater Pool - Yewhick salinity Monitor can help check the salt level (Ideal level: 2700-3400 ppm) of the saltwater pool and hot tub with salt chlorinator system. Help the salt chlorinator work more efficiently in the appropriate salinity value.The Yewhick salt meter can help you keep your pool clean and avoid the negative effects of too much or too little salt on your body and pool equipment.
Free Chlorine Monitor for Pool: The Yewhick digital chlorine Tester can quickly help you monitor the concentration of free chlorine ions in your swimming pool. For most pools, the free chlorine concentration range is usually between 1-3 ppm. This effectively purifies the water while keeping it clear and transparent, making the pool look more appealing and swimmers able to enjoy a healthy and pleasant swimming experience.
Real-Time Smart pool chemical Monitoring : Wireless connection with your smartphone via the free Tuya App. Instantly access real-time pool data anytime and anywhere, ensuring convenient water quality monitoring. Supports solar and USB charging, ensuring reliable performance outdoors. The floating design makes it easy to use in any pool, and it supports 2.4GHz WiFi. Simple app calibration ensures accurate results.
More Accurate Digital pH Monitor: With the latest chips and algorithms, you can get faster readings and more stable results. Maintaining the proper pH level is critical to the operation and maintenance of saltwater pools, and our pH meter can help you check the pH level of your pool regularly. Typically, the ideal pH range is between 7.2 and 7.8
Pool Chlorine Monitor VS Pool Test Strips - When testing with test strips, you have to guess the value of your pool based on the color of the strips; however, free chlorine meter are simpler, more accurate, and friendlier to color-insensitive users than test strips. Simply place it in the water for a few seconds to get an accurate reading, plus, using enough test strips adds to the cost in the long run.

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8.1

Crystal Water Monitor

Crystal Smart Water Monitor for Salt Water Pools & Hot Tubs - 24/7 Continuous Digital Water Testing with App Notifications & Customized Chemical Dosing (New Model)

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Main Highlights

SIMPLIFIED POOL & HOT TUB CARE: The Crystal Smart Water Monitor actively tests your pool or hot tub's water 1,000 times per week to give you personalized chemical recommendations that are much more reliable than any single point-in-time sample of water or a test strip reading. It's as simple as monitor, notify, and adjust.
AUTOMATIC NOTIFICATIONS: The Crystal Water Monitor app automatically alerts you when you need to adjust your chemicals and provides precise chemical dosing recommendations customized for your pool or hot tub. Works with both Android and iOS.
TAKES GUESSWORK OUT OF ADDING CHEMICALS: Scan your chemicals barcode once, and the Crystal Water Monitor app will customize your chemical dosing recommendations for your preferred chemical brand. Supports all major chemical brands.
SUPPORTS SALTWATER TYPES: Works with saltwater pools, hot tubs and swim spas. Chlorine/bromine version also available.
THE CRYSTAL CLEAR CHOICE: While other smart monitors only sample your water once a day, Crystal continuously monitors it 144x a day providing the most accurate readings and dosing recommendations. Enjoy the freedom to use any of your preferred chemical brands instead of being forced to use proprietary ones. Say goodbye to expensive monthly replacement cartridge purchases competitive monitors require. Upgrade from confusing and inaccurate test strips with precise digital testing and save time constantly taking individual water samples to your pool store.
RELIABLE SERVICE & SUPPORT: Complimentary first-year service and US based customer support with your Crystal Water Monitor. Renew for $99/year thereafter to continue to receive ongoing notifications, chemical dosing, service, support, and free replacement parts.

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Our Best Overall Choice

Best Choice

9.7

MAV AquaDoc

Eagle Ray Digital Spa Water Test Kit by AquaDoc with Digital Water Tester and 30 hot tub Test Strips for Chlorine, Bromine, Total Hardness, Cyanuric Acid, Alkalinity, and pH

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Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Digital Hot Tub Water Testing Kit - Stop guessing with traditional strips. Insert a test strip into the Eagle Ray digital hot tub test kit and receive clear numerical results to help balance your hot tub water with confidence.
Tests 7 Essential Spa Parameters - Measures Total Chlorine, Free Chlorine, Bromine, Total Hardness, Cyanuric Acid, Total Alkalinity, and pH. Includes 30 spa test strips, designed for accurate water testing.
Fast Testing and Tracks Water Over Time - Insert a strip into the digital analyzer for clear numerical results in seconds. Stores up to 100 readings so you can monitor changes and maintain balanced hot tub water.
Built by a Spa and Pool Chemical Brand - Developed by AquaDoc, a trusted name in water care. This digital hot tub water test kit is designed for everyday spa owners, to support proper water balance and routine maintenance.
High-tech water monitors with complicated apps sound amazing, but when you look at their track record for delivering results, you'll find they often leave you with an incorrect analysis. Our digital spa test kit cuts out the fluff and delivers reliable results.

Show Price

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