Skip to main content
.us
Hello
Select your address
Industrial & Scientific
Select the department you want to search in
All Departments
Deals
Audible Books & Originals
Alexa Skills
Amazon Devices
Amazon Pharmacy
Amazon Warehouse
Appliances
Apps & Games
Arts, Crafts & Sewing
Automotive Parts & Accessories
Baby
Beauty & Personal Care
Books
CDs & Vinyl
Cell Phones & Accessories
Clothing, Shoes & Jewelry
Women
Men
Girls
Boys
Baby
Under $10
Amazon Explore
Collectibles & Fine Art
Computers
Courses
Credit and Payment Cards
Digital Educational Resources
Digital Music
Electronics
Garden & Outdoor
Gift Cards
Grocery & Gourmet Food
Handmade
Health, Household & Baby Care
Home & Business Services
Home & Kitchen
Industrial & Scientific
Just for Prime
Kindle Store
Luggage & Travel Gear
Magazine Subscriptions
Movies & TV
Musical Instruments
Office Products
Pet Supplies
Premium Beauty
Prime Video
Smart Home
Software
Sports & Outdoors
Subscription Boxes
Tools & Home Improvement
Toys & Games
Vehicles
Video Games
Whole Foods Market
Hello, Sign in
Account & Lists
Account
Returns
& Orders
0
Cart
All
Best Sellers
Prime
Customer Service
New Releases
Today's Deals
Find a Gift
Books
Gift Cards
Kindle Books
Fashion
Pharmacy
Toys & Games
Amazon Basics
Sell
Amazon Home
Computers
Coupons
Video Games
Home Improvement
Automotive
Beauty & Personal Care
#FoundItOnAmazon
Handmade
Smart Home
Health & Household
Pet Supplies
Free Shipping
TV & Video
Subscribe & Save
Disability Customer Support
Get ready for Game Day
Industrial & Scientific
Medical
Lab
Test & Measurement
Safety
Janitorial & Facilities
Food Service
Education
Material Handling
Materials
Metalworking
Electrical
FSA Eligible Items
Deals
There's a problem loading this menu right now.
Learn more about Amazon Prime.
Get free delivery with Amazon Prime
Prime members enjoy FREE Delivery and exclusive access to music, movies, TV shows, original audio series, and Kindle books.
>
Get started
Amazon Best Sellers
Our most popular products based on sales. Updated hourly.
Best Sellers in
Substance Analysis Instrumentation
#1
VIVOSUN pH and TDS Meter Combo, 0.05ph High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter
4.2 out of 5 stars
9,146
$19.99
#2
TENS/EMS Unit 20 Snap Tens Unit Electrode Pads Large Premium Replacement Tens Electrodes Reusable up to 25 Times per Electrode Med X Tens
4.5 out of 5 stars
9,042
$10.99
#3
pH Test Strips for Testing Alkaline and Acid Levels in The Body. Track & Monitor Your pH Level Using Saliva and Urine. Get Highly Accurate Results in Seconds.
4.4 out of 5 stars
6,077
$10.95
#4
Water Quality Tester, Accurate and Reliable, HoneForest TDS Meter, EC Meter & Temperature Meter 3 in 1, 0-9990ppm, Ideal Water Test Meter for Drinking Water, Aquariums, etc.
4.4 out of 5 stars
6,142
$14.97
#5
TENS Electrodes, Super Value 20 Replacement Electrode Pads for TENS Units, Snap TENS Unit Electrodes
4.7 out of 5 stars
3,394
$9.25
#6
Ph. 1-14 Test Paper Extensive Test Paper Litmus Test Paper Sonkir pH Test Strips,Test pH for Saliva Urine Water Soil Testing(2-Pack pH Test Strips)
4.2 out of 5 stars
2,045
$4.68
#7
Apera Instruments AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy
4.6 out of 5 stars
2,874
$49.75
-
$51.57
#8
3 Pack pH.1-14 Test Paper Extensive Test Paper Litmus Test Paper 240 Strips pH Test with Storage Case for Saliva Urine Water Soil Testing Pet Food and Diet pH Monitoring (3 Pack with Storage Case)
4.3 out of 5 stars
435
$6.99
#9
pH Test Strips 0 to 14 (200 ct) for Urine, Saliva, Drinking Water, Kombucha, Pool, Spa, Hotub, Soap, & Liquids. pH Acid Alkaline Universal Test Strips. Acidity Alkalinity Litmus Paper Testing Strips
4.2 out of 5 stars
1,638
$9.99
#10
17 in 1 Premium Drinking Water Test Kit - 100 Strips + 2 Bacteria Tests - Home Water Quality Test - Well and Tap Water - Easy Testing for Lead, Bacteria, Hardness, Fluoride, pH, Iron, Copper and more!
4.2 out of 5 stars
1,003
$25.99
#11
Plastic pH Test Strips, Universal Application (pH 0-14), 100 Strips
4.3 out of 5 stars
1,026
$6.42
-
$7.74
#12
PH Meter for Water Hydroponics Digital PH Tester Pen 0.01 High Accuracy Pocket Size with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium (Yellow)
4.0 out of 5 stars
277
$12.99
#13
Watersafe Drinking Water Test Kit - World's Most Sensitive Lead Test - 10-Parameters Detected in Tap & Well Water, Water Filters - Easy Test Strips for Lead, Pesticides, Bacteria, Hardness, and More
4.4 out of 5 stars
1,561
$24.94
-
$74.90
#14
Universal pH Test Paper Strips pH Test Strips Roll, pH Measure Full Range 0-14,16.4 ft/Roll (2 Rolls)
4.3 out of 5 stars
2,001
$6.59
-
$9.99
#15
North Mountain Supply Glass Hydrometer - Alcoholmeter 0-200 Proof & 0-100 Tralle
4.5 out of 5 stars
953
$8.99
#16
16 in 1 Drinking Water Test Kit | Water Test Strips for Aquarium, Pool, Spa, Well & Tap Water | High Sensitivity Test Strips detect pH, Hardness, Chlorine, Lead, Iron, Copper, Nitrate, Nitrite
4.2 out of 5 stars
951
$20.99
#17
NURSAL 20 Pack Electrodes Snap TENS Replacement Pads (not fit for NURSAL Blue TENS)Compatible with TENS Unit Muscle Stimulators Reuse More Than 30 Times
4.6 out of 5 stars
1,996
$11.99
#18
Med Lab Diagnostics pH Test Strips 200 ct for Urine and Saliva Body pH Testing. Urinalysis Reagent Test Strips for Body Acidity and Alkalinity. Food and Diet pH Monitoring
4.4 out of 5 stars
3,181
$9.79
#19
VIVOSUN PH Meter Digital PH Tester Pen for Water
3.9 out of 5 stars
2,173
$13.99
#20
Bluelab PENPH pH Pen Fully Waterproof Pocket Tester, Easy Calibration, Double Junction Probe for Improved Accuracy and Durability
4.5 out of 5 stars
1,093
$91.07
#21
Digital PH Meter,Backlight PH Meter 0.01 High Precision Water Quality Tester, PH Range is 0-14, Suitable for Drinking Water Swimming Pool and Aquarium PH Tester Design, with ATC
4.3 out of 5 stars
277
$11.99
#22
DONECO TENS Unit Pads 2X2 48 Pcs Replacement Pads Electrode Patches for Electrotherapy
4.7 out of 5 stars
3,639
$18.99
#23
TDS Meter Digital Water Tester, DUMSAMKER Professional 3-in-1 TDS, Temperature and EC Meter with Carrying Case, 0-9999ppm, Ideal ppm Meter for Drinking Water, Aquariums and More
4.5 out of 5 stars
2,029
$13.99
#24
Brix Refractometer with ATC, Dual Scale - Specific Gravity & Brix, Hydrometer in Wine Making and Beer Brewing, Homebrew Kit
4.5 out of 5 stars
568
$17.99
#25
Digital PH Meter, PH Meter 0.01 PH High Accuracy Water Quality Tester with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium Water PH Tester Design with ATC
4.5 out of 5 stars
4,356
$12.99
#26
Pack of 2 PH 1-14 Test Paper Litmus Strips Tester, 80pcs Per Pack
4.2 out of 5 stars
1,122
$3.79
#27
TDS Meter Digital Water Tester, Lxuemlu Professional 3-in-1 TDS, Temperature and EC Meter with Carrying Case, 0-9999ppm, Ideal ppm Meter for Drinking Water, Aquariums and More (LX-TDS1)
4.5 out of 5 stars
2,682
$13.97
#28
Digital PH Meter, PH Meter 0.01 PH High Accuracy Water Quality Tester with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium Water PH Tester Design with ATC
4.1 out of 5 stars
2,315
$12.99
#29
The FryOilSaver Co, Chlorine Test Strips for Restaurants and Food Service, Precision Chlorine Test Paper, 1 x Vial of 100 Chlorine Sanitizer Test Strips, 0-200 ppm, Bleach Test Strips, FMP 142-1362.
4.7 out of 5 stars
427
$6.80
-
$17.00
#30
TDS Meter Digital Water Tester - ppm Meter, EC & Temperature Test Pen 3-in-1 | Easy to Use Water Quality Tester | Ideal for Testing RO Drinking Water Hydroponics Aquarium Swimming Pool & More | White
4.4 out of 5 stars
2,441
$13.97
#31
Apera Instruments AI311 Premium Series PH60 Waterproof pH Pocket Tester Kit, Replaceable Probe, ±0.01 pH Accuracy
4.6 out of 5 stars
1,304
$71.77
#32
Total Water Hardness Test Strips. Each Strip Best and Reliable for Home Testing Pool, Spa, Aquarium, Drinking Water, Well. Easy to Compare Color Chart. Dip for Quality Accurate Results in Seconds.
4.3 out of 5 stars
779
$9.95
#33
DONECO TENS Unit Pads 2X4 20 Pcs Replacement Pads Electrode Patches for Electrotherapy
4.6 out of 5 stars
1,055
$17.99
#34
Hydrometer Alcohol Meter Test Kit: Distilled Alcohol American-Made 0-200 Proof Pro Series Traceable Alcoholmeter Tester Set with Glass Jar for Proofing Distilled Spirits
4.7 out of 5 stars
1,063
$39.99
#35
Dr.meter Upgraded PH838 0.01 Resolution High Accuracy Backlit Two-Color LCD Display pH Meter with ATC, 0-14pH Measurement Range with Data Hold Function
4.3 out of 5 stars
581
$34.99
#36
Syrtenty TENS Unit Pads 1" Round 8 pcs Electrodes
4.2 out of 5 stars
909
$8.49
-
$19.99
#37
DONECO Omron Compatible TENS Electrodes - 10 (5 Pair) Premium Omron Compatible Replacement Pads for TENS Units
4.6 out of 5 stars
616
$16.99
#38
Syrtenty TENS Unit Pads 1.5"x13" 4 pcs Electrodes
4.4 out of 5 stars
262
$6.99
-
$18.99
#39
TDS Meter Digital Water Tester, Water Quality Tester, TDS Temperature & Conductivity Meter 4 in 1, Hydroponics EC Meter, ppm Meter for Home ATC Drinking Water, Aquarium and More…
4.3 out of 5 stars
909
$8.99
-
$14.99
#40
Lead Iron Copper and Mercury - Home Water Test Kit for Well Tap and Drinking Water | Fast & Accurate Quality Testing to EPA Standards | Easy to Use and Sensitive Tester Strips Made in USA
4.3 out of 5 stars
668
$23.97
#41
Chefast Hydrometer and Glass Test Jar for Wine, Beer, Mead and Kombucha - Combo Set of Brewing Hydrometer, Alcohol Test Tube, Cleaning Brush, Cloth and Storage Bag - ABV, Brix and Gravity Tester Kit
4.5 out of 5 stars
3,017
$21.49
-
$26.49
#42
200 Strips - Chlorine Sanitizer Test Strips Food Service 0-500 ppm (Value Pack) - Bleach Test Strips - Chlorine Test Strips for Food Service - Restaurant Test Strips - Chlorine Tester
4.6 out of 5 stars
356
$13.69
#43
10 Pieces Large Electrode Pads for TENS Unit Replacement Pads for TENS Machine
4.4 out of 5 stars
637
$7.99
#44
Digital pH Meter with ATC pH Tester, 3 in 1 pH TDS Temp 0.01 Resolution High Accuracy Pen Type Tester, Water Tester for Water, Wine, Spas, Aquariums
4.8 out of 5 stars
836
$35.99
#45
USA Made Restaurant Sanitizer Chlorine Bleach Test Paper, 10-200 ppm [Vial of 100 Paper Strips]
4.6 out of 5 stars
950
$5.75
#46
VIVOSUN PH Meter, TDS and EC Meter, Soil Tester
4.3 out of 5 stars
116
$27.99
#47
pH Meter for Liquid Water, Membrane Solutions Digital pH Tester, High Accuracy 0.01, Temperature Sensor ATC, Electronic Auto Calibration, for Hydroponics, Pool, Aquarium Water Testing
3.9 out of 5 stars
169
$9.99
-
$17.99
#48
THINK ALKALINE A2O Water - Made in USA, Water pH Test Liquid (WHT/100-125 Tests)
4.6 out of 5 stars
1,363
$9.75
#49
Hydrion QT-40 Quaternary Sanitizer Test Tape 15 feet Roll Quat Color Chart 0-500 ppm Range
4.6 out of 5 stars
594
$9.49
#50
Hydrion Ph Paper (93) with Dispenser and Color Chart - Full Range Insta Chek ph- 0-13
4.4 out of 5 stars
825
$8.49
←
Previous page
1
2
Next page
→
‹
Any Department
‹
Industrial & Scientific
‹
Test, Measure & Inspect
Substance Analysis Instrumentation
Calorimeters
Colorimeters
Conductivity Meters & Accessories
Dissolved Oxygen Meters & Accessories
Dosimeters
Electrodes
Flowmeters
Fluorometers
Hydrometers
Luminometers
Multiparameter Meters
Osmometers
pH Testing
Refractometers
Spectrometry
Spectrophotometer & Colorimeter Accessories
Surface Tension Meters
Turbidity Meters
Viscometers
Your recently viewed items and featured recommendations
Your recently viewed items and featured recommendations
Back to top
Get to Know Us
Careers
Blog
About Amazon
Press Center
Investor Relations
Amazon Devices
Amazon Tours
Make Money with Us
Sell products on Amazon
Sell apps on Amazon
Become an Affiliate
Advertise Your Products
Self-Publish with Us
Host an Amazon Hub
›
See More Make Money with Us
Amazon Payment Products
Amazon Rewards Visa Signature Cards
Amazon.com Store Card
Amazon Business Card
Amazon Business Line of Credit
Shop with Points
Credit Card Marketplace
Reload Your Balance
Amazon Currency Converter
Let Us Help You
Amazon and COVID-19
Your Account
Your Orders
Shipping Rates & Policies
Amazon Prime
Returns & Replacements
Manage Your Content and Devices
Amazon Assistant
Help
English
Choose a language for shopping.
United States
Choose a country/region for shopping.
Amazon Music
Stream millions
of songs
Amazon Advertising
Find, attract, and
engage customers
Amazon Drive
Cloud storage
from Amazon
6pm
Score deals
on fashion brands
AbeBooks
Books, art
& collectibles
ACX
Audiobook Publishing
Made Easy
Alexa
Actionable Analytics
for the Web
Sell on Amazon
Start a Selling Account
Amazon Business
Everything For
Your Business
Amazon Fresh
Groceries & More
Right To Your Door
AmazonGlobal
Ship Orders
Internationally
Home Services
Experienced Pros
Happiness Guarantee
Amazon Ignite
Sell your original
Digital Educational
Resources
Amazon Rapids
Fun stories for
kids on the go
Amazon Web Services
Scalable Cloud
Computing Services
Audible
Listen to Books & Original
Audio Performances
Book Depository
Books With Free
Delivery Worldwide
Box Office Mojo
Find Movie
Box Office Data
ComiXology
Thousands of
Digital Comics
DPReview
Digital
Photography
East Dane
Designer Men's
Fashion
Fabric
Sewing, Quilting
& Knitting
Goodreads
Book reviews
& recommendations
IMDb
Movies, TV
& Celebrities
IMDbPro
Get Info Entertainment
Professionals Need
Kindle Direct Publishing
Indie Digital & Print Publishing
Made Easy
Amazon Photos
Unlimited Photo Storage
Free With Prime
Prime Video Direct
Video Distribution
Made Easy
Shopbop
Designer
Fashion Brands
Amazon Warehouse
Great Deals on
Quality Used Products
Whole Foods Market
America’s Healthiest
Grocery Store
Woot!
Deals and
Shenanigans
Zappos
Shoes &
Clothing
Ring
Smart Home
Security Systems
eero WiFi
Stream 4K Video
in Every Room
Neighbors App
Real-Time Crime
& Safety Alerts
Amazon Subscription Boxes
Top subscription boxes – right to your door
PillPack
Pharmacy Simplified
Amazon Renewed
Like-new products
you can trust
Amazon Second Chance
Pass it on, trade it in,
give it a second life
Conditions of Use
Privacy Notice
Interest-Based Ads
© 1996-2020, Amazon.com, Inc. or its affiliates
v