what is the actual range of chlorine that it tests for? it shows some ambiguous numbers, but what are the units of those numbers?

It ranges from 10,50,100,and 200 P.P.M (Parts Per Million) Available Chlorine

Will this test fro strength of HOCl

No idea. They are test strips that turn color to meet a PH Level.

How do you test chlorine in a pool with these strips? When I try strip stays white.

This is not used for testing chlorine in a pool. It is more used more testing the bleach mixture in your #3 cleaning solution like in a spray bottle.(100-200ppm). That will sanitize the clean areas, dishes, toys etc. Amazon has great Pool Testing Equipment kits and so on. Search for that.

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Krowne Chlorine Test Strips, 100 Piece

Product ID: 151865026

Details

Brand
Krowne
Manufacturer
Krowne Metal
Recommended uses for product
Chlorine in
Unit count
1.0 count
pH range
7.2-7.6

📏100 strips per bottle

🧪10-200 PPM precision range

🇺🇸Proudly made in USA

Description

🧴 Stay ahead of contamination—test smarter, not harder!

MADE IN THE USA - Manufactured domestically for trusted quality and reliability.
VERSATILE USE CASE - Ideal for pools, spas, and bleach solution testing to maintain perfect sanitation levels.
EASY TO READ COLOR CHART - Quickly interpret results with the included color-coded guide—no guesswork needed.
BULK SUPPLY FOR CONSISTENCY - 100 test strips per bottle ensure you never run out during critical testing.
PRECISION CHLORINE MONITORING - Accurately measures sanitizer strength from 10 to 200 PPM for optimal safety.

Krowne Chlorine Test Strips offer a reliable, easy-to-use solution for measuring chlorine levels between 10 and 200 PPM. Made in the USA, this pack of 100 strips includes a color-coded chart for quick interpretation, making it perfect for maintaining safe sanitizer levels in pools, spas, and bleach solutions.

Specifications

ASIN	B003Z9HWQ8
Brand	Krowne
Customer Reviews	4.4 4.4 out of 5 stars (341)
Global Trade Identification Number	00822196251239, 00822196951238
Item Weight	45 g
Manufacturer	Krowne Metal
Manufacturer Part Number	S25-123
Material Type	Metal
Model Number	S25-123
Number of Items	1
Recommended Uses For Product	Chlorine in swimming pool water
Sterility Rating	7.2-7.6
UPC	822196251239 671875507323 822196951238 123456000056
Unit Count	1.0 count

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