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 S25-123 Chlorine/Sanitizer Level Test Strip Kit with Color Coded Chart for Restaurant Hotel Cafeteria Catering Service | 100 Piece Per Bottle | 0-200 PPM Test Range | 3.0"L x 4.0"W x 0.5"H, NSF

Product ID: 7325891

Details

Brand
Krowne
Manufacturer
Krowne
Ph Range
7.2-7.6
Recommended Uses For Product
Chlorine in
Unit Count
1 Count

🌈Color-coded chart for easy reading

📊Test range 0-200 ppm chlorine

🧪100 strips per bottle

MX$487

Duties & taxes included

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Sold byAmazon MexicoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧴 Stay ahead of the clean game with Krowne’s chlorine test strips!

TRUSTED PRECISION - Krowne’s litmus paper technology delivers reliable, consistent results every time
BULK TESTING POWER - 100 high-accuracy strips per bottle keep you stocked and ready
WIDE DETECTION RANGE - Measures chlorine from 0 to 200 ppm for versatile pool and sanitizer monitoring
INSTANT VISUAL FEEDBACK - Color-coded chart ensures quick, foolproof chlorine level readings
POOL SANITIZER ESSENTIAL - Specifically designed for bleach-based solutions, perfect for professional-grade sanitation

Krowne S25-123 Chlorine Test Strips provide 100 precise, easy-to-read litmus paper strips with a color-coded chart, measuring chlorine levels from 0 to 200 ppm. Ideal for monitoring bleach-based sanitizers and swimming pool water, these strips offer reliable, professional-grade testing in a single convenient bottle.

Specifications

ASIN	B003Z9HWQ8
Best Sellers Rank	#94,164 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #106 in Swimming Pool Test Strips
Brand Name	Krowne
Customer Reviews	4.3 4.3 out of 5 stars (346)
Global Trade Identification Number	00822196251239, 00822196951238
Included Components	Test Strips
Item Type Name	Test Strips
Item Weight	1.6 ounces
Manufacturer	Krowne
Material Type	Litmus Paper
Model Number	S25-123
Number of Items	1
Number of Packs	1
Part Number	S25-123
Recommended Uses For Product	Chlorine in Swimming Pool Water
Sterility Rating	7.2-7.6
UPC	822196251239 671875507323 822196951238 123456000056
Unit Count	1 Count

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