Ever since I started using CrystalGauge, I finally trust the water I give my family. One quick dip tells me pH, TDS, and more instead of guessing with test strips.
Melissa R.Verified Buyer
CrystalGauge ™
Regular price
$159.99
Regular price
$159.99
Sale price
Unit price
per
Low Stock - Selling Fast
SUMMER SALE — [pct]% OFF + [gifts] FREE GIFTS
--:--:--
Low stock available
![]()
Fast Shipping
🎁 FREE GIFT
Waterproof Pocket Field Notebook
95% already claimed
FREE$12.00
Order today and it ships by -
Couldn't load pickup availability
- Apple pay payment method
- American express payment method
- Master payment method
- Visa payment method
- Discover payment method
- Jcb payment method
- Unionpay payment method
- Diners-club payment method
- Google pay payment method
How It Works
How It Works
- Dip the probe into your water sample and power on the device.
- Wait a few seconds while the sensor stabilizes and calculates live readings.
- View your pH, TDS, EC, salinity, specific gravity, and temperature instantly on the backlit screen.
What's Included
What's Included
- 1x CrystalGauge 6-in-1 Digital Water Tester
- 1x User Manual & Calibration Guide
- 1x Protective Carry Pouch
- 2x Button Cell Batteries (pre-installed)
Shipping & Returns
Shipping & Returns
Once your item/s is dispatched,
the estimated delivery time is:
- USA: 2-9 business days
- UK: 5-13 business days
- Australia: 5-13 business days
- Canada: 2-12 business days
- Europe: 5-13 business days
You have 90 days to return your product for a full refund (return shipping is covered by the customer; defective items ship a free replacement).
Official Authorized Retailer
This product is not available on Amazon or eBay. You are purchasing directly from the only authorized seller — which means full warranty, verified authenticity, and dedicated customer support. Beware of counterfeit listings on third-party marketplaces.
CrystalGauge
🎁 YOUR FREE GIFT
✓ GIFT ADDED TO YOUR ORDER
Where do we send it?
Your gift details + order updates — straight to your inbox.
Engineered for Precision You Can Trust
science
All-in-One Water Analysis
Measure pH, TDS, EC, salinity, specific gravity, and temperature with one compact tool. Skip buying six different testers.
touch_app
Instant Hold & Log Readings
Freeze any reading with one tap so you never lose a critical number mid-test. Perfect for logging results hands-free.
battery_saver
All-Day Battery Efficiency
The meter powers down after five minutes of inactivity to protect battery life. Grab it anytime, it's always ready.
public
Test Anywhere, Anytime
Test tap water, pools, aquariums, and hydroponic systems with equal confidence. Reliable calibration keeps every reading accurate wherever you are.
What our 17,000+ Customers say
Based On Real and Honest Experiences
I run a small reef tank and needed something that reads salinity and specific gravity fast. CrystalGauge nails both in seconds, keeping my corals stress-free.
Carlos T.Verified Buyer
I doubted a small gadget could beat my old lab kit, but CrystalGauge proved me wrong within a week. The backlit screen and rock-steady readings won me over completely.
Priya N.Verified Buyer
Frequently Asked Questions
verified
+347 experts reviewed it
as the best choice in 2026
+347 experts reviewed it
as the best choice in 2026
Q1 How accurate is CrystalGauge's testing?
CrystalGauge uses a high-sensitivity probe with automatic temperature compensation, so you get lab-grade accuracy every time, no matter the water's temperature or acidity level.
Q2 What can I actually test with this device?
You can measure pH, TDS, EC, salinity, specific gravity, and temperature in tap water, pools, aquariums, and hydroponic setups, all with a single handheld unit.
Q3 Do I need to calibrate it before every use?
Not at all. CrystalGauge ships pre-calibrated and holds its accuracy for months of regular use, with only occasional recalibration recommended for best results.
Q4 How long does the battery last?
The auto-off feature shuts the meter down after five minutes of inactivity, so a single set of batteries can easily last for months of everyday testing.
Q5 Can I read the screen in low light or outdoors?
Yes. The backlit display stays crisp and easy to read whether you're testing at night, indoors, or in bright outdoor sunlight.
Q6 Is it safe to use in saltwater aquariums or pools?
Absolutely. CrystalGauge is built to handle salinity and specific gravity readings, making it ideal for marine tanks, pools, and spas alike.
Q7 What comes in the box?
Every order includes the CrystalGauge meter, a full user manual, a protective carry pouch, and pre-installed batteries so you can start testing right away.
Q8 What if I run into questions after I buy?
Our water quality specialists are available around the clock to help with calibration, operation, or any technical question that comes up.
50% OFF
Your free gift: Waterproof Pocket Field Notebook
FREE
Ready to make it yours?
Get CrystalGauge at today's price with your free gift included — and a full 90 days to enjoy it.
Your free gift: Waterproof Pocket Field Notebook
FREE
4.8/5 by 17,000+ customers
90-Day Money-Back
![]()
Fast Shipping
shield_lock
100% Secure Payment
delivery_truck_speed
Fast Shipping
support_agent
Premium support
star_shine
Reviewed Top 1 in 2026