The Problue FS-850AD 1st Stage Regulator – DIN is a first-stage regulator from Problue – the critical link between your tank and your breathing. Engineered for reliable pressure reduction and smooth air delivery at any depth, it’s the foundation of any well-built regulator system for diving at Langkawi’s pristine blue waters.
Technical Specifications
| Specification | Details |
| Brand | Problue |
| Product | FS-850AD 1st Stage Regulator – DIN |
| Stage | 1st Stage |
| Type | Air balanced |
| Material | Chrome / Brass |
| Connection | DIN / Yoke |
| Best For | Recreational diving |
Key Features
- Air-balanced piston: Delivers consistent pressure reduction regardless of tank pressure.
- DIN / Yoke compatible: Fits the most common tank valve standards.
- Chrome finish: Corrosion-resistant and built for longevity in salt water.
- Smooth breathing: Low work of breathing at any depth.
Suited for Malaysian Dive Sites
The Problue FS-850AD 1st Stage Regulator – DIN is built to perform across Malaysia’s best underwater destinations. Whether you’re exploring Langkawi’s pristine blue waters, or heading to new reefs and wrecks, this gear delivers the reliability and comfort you need on every dive.
Care & Maintenance
- Rinse after every dive – salt crystals inside the housing cause wear.
- Cap the inlet when not in use – keeps sand and debris out.
- Have it serviced by a certified technician every 12–18 months.
- Never disassemble the internals yourself – it voids the warranty.
Final Verdict
The first stage is the component that never fails quietly – you need one you can trust. The Problue FS-850AD 1st Stage Regulator – DIN is a reliable, well-built choice.




Sylvia Wong –
Can anyone assist in identifying the difference between a yoke and a first stage regulator I hope this message is helpful!
Dwaine Wong –
Can someone explain what a DIN connection is How does this compare to a yoke connection?
Junhao Lo –
Hello Dwaine, thank you for your review. A DIN connection refers to a type of yoke connection used in scuba diving, particularly for first-stage regulators like the Problue FS-850AD. DIN (Deutsches Institut für Normung) connections are commonly used in Europe and are interchangeable with yoke connections, but they have a more secure and reliable locking mechanism. The main difference between DIN and yoke connections is the way they attach to the cylinder. DIN connections have a threaded opening that screws onto the cylinder valve, while yoke connections have a removable yoke that clips onto the cylinder valve. Both types of connections work equally well, but some divers prefer one over the other due to personal preference or cylinder valve type. I hope this helps clarify the difference for you.
Shelbie Singh –
What really stands out about the Problue FS-850AD is its ease of use, even for a novice diver like me. The yoke balanced diaphragm 5 L.P ports are a nice touch, making it very comfortable to breathe through. Would this be compatible with a backplate system?
Junhao Lo –
Thank you so much for your review, Shelbie! We’re glad to hear that the Problue FS-850AD has been easy to use for you, even as a novice diver. The yoke balanced diaphragm 5 L.P ports are indeed a convenient feature. As for compatibility with a backplate system, our technical team advises that this regulator can be used with a backplate system. However, please note that you’ll need to ensure proper connection and compatibility with your specific backplate system. We recommend consulting with a professional scuba diving technician for final confirmation before making any purchases. Have any further questions or would you like any specific advice on this? We’re here to help!
Teo Chia Wei –
I recently purchased the Problue FS-850AD for a deep-sea diving expedition, and I must say it performed exceptionally well. The adjustment for the number of turns to open the valve is smooth, making it easier to fine-tune my breathing. However, it would be nice if they included an Instruction manual in multiple languages.
Amos Koh –
I’ve used my Problue FS-850AD for several dives now, and I’ve noticed a slight delay in delivery pressure when going from snorkeling depth to diving depth. Nevertheless, it’s a minor complaint, as the rest of my experience has been great.
Abigail Tan –
Can someone recommend a reliable storage case for storing and carrying the regulator on diving trips? This would be great thanks!
Junhao Lo –
Thank you for reaching out to us, Abigail. We recommend the Mares Zip Regulator Storage Case for its durability and waterproof design. This storage case is specifically designed for 1st stage regulators like the Problue FS-850AD. It’s a great investment to protect your valuable dive gear during storage and transport. Another great option is the OCEANIC DRY CASE, also designed to keep your regulator safe and secure. Both of these storage cases are well-regarded by divers, and we’re confident you’ll find one that suits your needs.