What size fitting does the hose barb have?

The same standard size used for all oxygen breathing equipment.

Does this read 1/4 1/32 in LPM?

I think the lowest flow rate is 0.5 lpm.

can a humidifier be connected ?

https://www.amazon.com/KANGneei-Oxygen-Bubbler-Bottle-Concentrator/dp/B094DP455X/ref=sr_1_24?crid=2TQ7NTTKZ3PJB&dchild=1&keywords=oxygen+humidifier+bottle&qid=1621964450&sprefix=oxygen+hu%2Caps%2C183&sr=8-24

Ot says the flow rate can be adjusted in 12 steps from 0. Does it have steps less than 1 Lpm such as .5 .25 etc? Thanks

I think so . if you need .5 you likely do not need O2.

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Ever Ready First Aid Oxygen Regulator CGA-870 Gauge Flow Rate with Wrench Key - 0-15LPM

Ever Ready First Aid Oxygen Regulator CGA-870 Gauge Flow Rate with Wrench Key - 0-15LPM

Product ID: 99516844

Details

Brand
Ever Ready Aid
Material
Aluminum Brass
Number of Items
1
Thread Type
Cga-870
Unit Count
1 Count

📏Compact 4.5" x 2.5" x 1.25" size

⚙️12 preset flow settings 0-15 LPM

🛠️Includes oxygen key with chain

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Description

🩺 Stay prepared, stay ahead — oxygen control that means business

ALWAYS READY ACCESS - Oxygen key attached by chain means no fumbling in critical moments
LEAK PROOF CONNECTION - Single barb outlet secures tubing to prevent leaks and detachment
UNIVERSAL CGA 870 FIT - Seamlessly compatible with any CGA-870 oxygen tank up to 2000 PSI
LIGHTWEIGHT DURABILITY - Anodized aluminum and brass build ensures strength without bulk
PRECISION FLOW CONTROL - Easily dial through 12 flow rates for tailored oxygen delivery

The Ever Ready First Aid Oxygen Regulator CGA-870 is a compact, lightweight device engineered for precise oxygen flow control from 0 to 15 LPM across 12 preset settings. Crafted from anodized aluminum and brass, it fits any CGA-870 oxygen tank up to 2000 PSI. Featuring a secure single barb outlet and an included oxygen key with chain, it ensures reliable, leak-free operation and quick access in emergencies.

Specifications

ASIN	B07MFR94DP
Best Sellers Rank	#142,492 in Health & Household ( See Top 100 in Health & Household ) #225 in Oxygen Accessories
Brand	Ever Ready First Aid
Brand Name	Ever Ready First Aid
Customer Reviews	4.6 out of 5 stars 1,697 Reviews
Manufacturer	Ever Ready First Aid
Material	Aluminum, Brass
Material Type	Aluminum, Brass
Model	BD16549
Number of Items	1
Part Number	BD16549
Thread Style	Cga-870
Thread Type	Cga-870
UPC	843484102002
Unit Count	1 Count

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£35.28

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In stock

Sold byAmazon UKDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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TrustScore 4.5 | 7,300+ reviews

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