Sales proposal · Live fish holding tanks

PSA Oxygen Generator Solutions for Live Fish Holding Tanks

Q: What happens if power fails?

An alarm and emergency O2 supply system can be added to alert staff and provide backup oxygen before levels become critical.

A dependable, on-site oxygen supply built for fish markets, holding tanks and live seafood transport. Oxygen from electricity, with no cylinders to refill. Engineered by O2MOS / DK Solutions.

90%+oxygen purity

7 LPMoxygen flow

27 kgunit weight

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O2MOS oxygen generator units installed beside live fish holding tanks

The challenge

Keeping Fish Alive Costs More Than It Should

Holding tanks and live seafood displays depend on a constant oxygen supply. Most operators still rely on high-pressure cylinders or liquid oxygen, a setup with real, ongoing risk.

Sudden oxygen shortages

Cylinders run out without warning, causing shortages and mass mortality events.

Heavy and hazardous logistics

Refilling and transporting pressurized cylinders is costly, labor-intensive and carries explosion risk.

Rising, unpredictable costs

Purchase costs climb further in island and remote locations far from suppliers.

No backup when power fails

A blackout can stop aeration entirely. With no cylinder reserve, losses can happen within hours.

The solution

O2MOS Smart PSA Oxygen Generator, Model O2MOS-7LC-K

O2MOS-7LC-K smart PSA oxygen concentrator with digital controller

Using only electricity, the unit separates 90%+ oxygen from ambient air (21% O₂) with PSA technology. Performance and status are monitored digitally in real time, with remote control over the internet and predictive maintenance.

PSA technologyRemote monitoring≥ 90% purityPredictive maintenance

Model	O2MOS-7LC-K
O₂ flow / purity	7 LPM / ≥ 90% (no-load: 9 LPM)
Supply pressure	Max. 1.3 bar
Outlet	6 mm one-touch fitting
Power	Avg. ≤ 480 W (220 VAC / 60 Hz)
Size / weight	355 × 375 × 578 mm / 27 kg
Enclosure	Steel frame, aluminum case, beige powder coating
Monitoring	Process/supply pressure, temperature, voltage, O₂ flow and concentration
Network	Wi-Fi 2.4G

How it works

Core Technology: PSA System

PSA process: atmospheric air intake, zeolite adsorption beds, high-purity oxygen output

Pressure Swing Adsorption (PSA) separates oxygen from ambient air. Zeolite beds selectively adsorb nitrogen while releasing concentrated, high-purity O₂ for immediate use.

Key advantages

High purity (90%+): consistent oxygen concentration comparable to medical-grade
Stable continuous output: reliable pressure and flow for uninterrupted aeration
Long service life: durable components proven across years of field use
Compact and lightweight: only 27 kg, easy to install in tight tank-side spaces

Key features of the O2MOS oxygen generator

Electricity-only operation

90%+ oxygen 24/7, 365 days a year, with no refills.

Advanced PSA technology

Consistent oxygen production at a stable, controlled pressure.

High-quality zeolite

Enhanced adsorption efficiency for reliable, high-purity output.

Compact and lightweight

Easy to transport, install and relocate.

Simple, low maintenance

Minimal upkeep for day-to-day running.

AC and DC power

Flexible options for fixed sites, vehicles and vessels.

Low power consumption

Only about 480 W for cost-effective, continuous operation.

Proven field reliability

High durability based on real aquaculture deployments.

Why switch

Say Goodbye to Dangerous High-Pressure Cylinders

Choose a safer, more convenient way to generate oxygen on site.

	Oxygen cylinders / LOX tanks	O2MOS PSA generator
Oxygen source	Liquid oxygen refill, delivered	On-site electrical generation
Convenience	Heavy, hazardous; sudden leaks can cause shortages	Simple operation; safe, worry-free use
Safety	Risk of explosion under pressure	Electrical safety control, no pressurized gas storage
Cost burden	Ongoing purchase cost; higher in island and remote areas	One-time investment; low running and maintenance cost
Monitoring	Manual checks of remaining supply	Real-time remote monitoring via Wi-Fi; predictive maintenance

System design

Capacity & Tank Configuration

Daily oxygen production capacity

7 LPM model at 90% purity equals 2 standard oxygen cylinders (40 L) per day.

Basic configuration: holding tank line

Pressure	Max 1.3 bar
Flow rate	7 LPM
Distribution	Flow meter manifold → up to 10 × 500 L tanks
Diffusion	Individual air stone per tank

System layout: O2MOS-7LC to holding tanks

O2MOS-7LC-K · up to 10 × 500 L tanks

Flow meter manifold 1

500 L500 L500 L500 L500 L

Flow meter manifold 2

500 L500 L500 L500 L500 L

Each tank has its own air stone.

Remote monitoring over Wi-Fi

Connect the unit to your network via Wi-Fi (2.4G) and check oxygen-generation parameters remotely in real time. Predictive maintenance supported.

Process pressureSupply pressureOperating temperatureVoltage statusO₂ flow rateO₂ concentration

The payoff

What This Means for Your Operation

Increasing dissolved oxygen significantly improves the living environment for fish, contributing directly to better fish quality and lower losses.

Lower live fish mortality

Stable dissolved oxygen reduces stress-related die-off during holding and display.

Improved live fish quality

Fresher appearance and condition for longer, supporting premium pricing.

No stress at high density or heat

Maintains healthy DO levels even in crowded tanks or hot summer conditions.

Lower long-term cost

Eliminates ongoing cylinder purchases and pays for itself over continued use.

Blowers and pumps alone are often not enough. O2MOS is especially effective in remote and hard-to-access regions.

Scalability

Built to Scale: From a Single Tank to a Full Facility

Multiple O2MOS units can be racked together with a booster and manifold to serve large holding facilities, wholesale markets and export operations.

Multi-unit O2MOS rack with integrated alarm and emergency O2 controller — Multi-unit rack with integrated alarm and emergency O₂ controller

Alarm & emergency O₂ supply

Continuously monitors output and alerts staff before oxygen levels become critical.

Booster + manifold distribution

Regulates pressure and flow across multiple tank zones at once.

Field-proven at scale

Deployed in wholesale markets, processing lines and mobile live-transport fleets.

Wi-Fi remote monitoring

Check generation parameters remotely in real time over Wi-Fi (2.4G).

Specifications

O2MOS-7LC-K Technical Specifications

Model no.	O2MOS-7LC-K
Oxygen purity	90%+ (20℃, standard air condition criteria)
Oxygen supply	7 L/min
Max. supply pressure	Max 1.3 bar
Operation noise	Less than 55 dB
Oxygen outlet port	6 mm one-touch fitting

Power supply	AC 220V / 60Hz (DC options available)
Power consumption	Avg. ≤ 480 W
Weight	27 kg
Material	Steel frame / aluminum case, beige powder coating
Dimensions	355 × 375 × 578 mm
Operating temperature	0℃ ~ 40℃ (auto cool-down above 70℃ control unit temp)

Also available in 2 LPM and 3 LPM models, and vehicle-mounted DC variants for live transport applications. Source: Product Specification Sheet, Nov. 2025.

Proven in the field

Already at Work in Live Fish Holding Tanks & Fish Markets

Wholesale fish market with individual tank and control units along stall rows — **Wholesale fish market**Individual tank-and-control units along the stall rows

Modular multi-species holding tank line after installation — **Modular tank line**Multi-species holding tanks, after installation

Retail market stall with compact tanks and dedicated aeration lines — **Retail market stall**Compact tanks with dedicated aeration lines

Rooftop-mounted units serving round and rectangular tanks — **Rooftop-mounted units**Multi-tank setup with round and rectangular tanks

Compact trough-side aeration for narrow market stalls — **Compact trough-side aeration**Space-saving setup for narrow market stalls

Full-scale indoor facility with multi-tier acrylic tanks — **Full-scale indoor facility**Multi-tier acrylic tanks with continuous water flow

FAQ

Frequently Asked Questions

How much oxygen does the O2MOS-7LC-K produce?

It supplies 7 L/min of oxygen at 90% or higher purity, about 9 L/min with no load. That equals roughly two standard 40 L oxygen cylinders per day.

What power does the oxygen generator need?

AC 220V / 60Hz with an average draw of 480 W or less. DC options are available for vehicles and vessels.

How many holding tanks can one unit supply?

A flow meter manifold distributes oxygen to up to ten 500 L tanks, each with its own air stone.

Can I monitor the unit remotely?

Yes. Connect it over Wi-Fi (2.4G) to check process and supply pressure, temperature, voltage, oxygen flow and concentration in real time. Predictive maintenance is supported.

What happens if power fails?

An alarm and emergency O₂ supply system can be added to alert staff and provide backup oxygen before levels become critical.

How loud is it?

Operating noise is less than 55 dB.