Is this for the membrane or tank?

I have 3 of these on my RO system. 1 to measure pressure before the membrane, 1 after the membrane and 1 on the tank. They can be used where ever you need to know water pressure. These will have an air bubble visible through the glass, it's normal and relieves pressure in the gauge, so don't be concerned with the air bubble.

Where should this be installed? Input to ro system or output from tank?

TJK... There are varying thoughts on this subject. My research has led me to install the gauge directly after the third stage of my 7 stage "Aquasafe aquarium II". I think as long as you install the gauge after your pre-filters will give you the true reading of the pressure in your unit. The bottom line is how much pressure is going into your RO canister. The RO membrane is the only part of the unit that works more efficiently with pressures above 40 psi. (50-60 psi). I hope this helps. NOTE most manufacturers have tutorials on their web site.

What does this do? Does it tell you if you have a busted bladder in the tank, hence no pressure?

no its to monitor the water presure coming in out of the filters this way you can tell if filters need changing.. as far as the bladder in the tank being busted you really don't need a guage for that if that occurs you would be able to tell because there would be water coming out of the valve that you use to put air in it

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DIGITEN水圧計0-1.6MPa 0-220psi 1/4 "f逆浸透システムポンプ

DIGITEN水圧計0-1.6MPa 0-220psi 1/4 "f逆浸透システムポンプ

Product ID: 761352503

Details

UPC
713458679703
ねじ山のタイプ
1/4" NPT
ブランド
DIGITEN
メーカー
DIGITEN
材質
ステンレス鋼

📏0-1.6MPa / 0-220 PSI pressure range

🔩1/4" NPT quick-connect fitting

🛡️Durable stainless steel gauge

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Description

💧 Stay ahead of your water pressure game with DIGITEN precision!

BUILT TO LAST - Stainless steel gauge ensures corrosion resistance and long-term reliability.
TRUSTED BY PROS - Highly rated with 4.5 stars from 800+ users—join the savvy crowd.
EFFORTLESS INSTALLATION - Quick-connect 1/4" PE fittings make setup a breeze—no tools, no hassle.
OPTIMIZE RO PERFORMANCE - Catch pressure drops early to prevent costly membrane damage.
PRECISION PRESSURE CONTROL - Monitor your RO system with pinpoint accuracy from 0 to 220 PSI.

The DIGITEN water pressure gauge offers a robust 0-1.6MPa (0-220 PSI) range with a 2" stainless steel dial and quick-connect 1/4" fittings. Designed for reverse osmosis systems, it provides essential real-time pressure monitoring to optimize performance and prevent system failures. Trusted by professionals and backed by a 4.5-star rating, this gauge combines durability with easy installation for seamless integration.

Specifications

ASIN	B00VUXD7ZG
Amazon 売れ筋ランキング	産業・研究開発用品 - 17,059位 ( 産業・研究開発用品の売れ筋ランキングを見る ) ゲージ・コンパス - 105位
UPC	713458679703
おすすめ度	4.5 5つ星のうち4.5 (828) var
ネジのタイプ	1/4" NPT
ブランド名	DIGITEN
メーカー名	DIGITEN
メーカー型番	ROCON-24
素材	ステンレス鋼

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