Spare Air 300PK-NDG Package - Nitrox with Dial Gauge

Name: Spare Air 300PK-NDG Package - Nitrox with Dial Gauge
Brand: Spare Air
SKU: 300PK-NDG
Price: 369.99 USD
Availability: InStock

Spare Air | SKU: 300PK-NDG

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Product Information

The Spare Air 300PK-NDG Nitrox Package with Dial Gauge is a 3 cu ft / 85 liter redundant backup air system built by Submersible Systems, Inc. for divers who want a hands-free, surface-bailout option that is also Nitrox ready up to 40% EAN. It pairs the standard 300PK-N Nitrox package with the Dial Gauge upgrade, giving an at-a-glance pressure reading in both PSI and BAR on a face that is roughly 30% larger than the base gauge.

Who it is for

This package suits recreational and Nitrox-certified divers who want a completely redundant mini-SCUBA system clipped to their BC for emergency ascents, rather than relying on buddy breathing. Its small, near-neutral-buoyancy profile makes it easy to carry on every dive without adding bulk. Its recommended depth limit is less than 100 feet.

Key details

Cylinder capacity: 3 cu ft / 85 liters, with a water capacity of 30 cu in / .5 liters
Service pressure: 3000 psi / 207 bar
Length: 13" / 33 cm; Diameter: 2.5" / 6.4 cm
Weight: 2.2 lb / 1 kg
Surface breaths: 57, based on 1.5 liters per breath
Cylinder material: Aluminum, Black Anodized finish, clearly marked NITROX
Regulator type: Balanced Single Stage, breathe-on-demand with no complicated instructions
Recommended depth limit: less than 100 feet

Compatibility and sizing

The cylinder attaches to any standard BC using the included holster and safety leash. It is refillable to 3000 psi off any Nitrox SCUBA tank or air compressor using the included patented refill adapter, and the Dial Gauge option shown here is available across all Spare Air models.

What's in the box

3 cu ft Spare Air Nitrox cylinder
Dial Gauge (shows pressure in PSI and BAR)
Holster with quick-disconnect straps and mouthpiece cover
Safety Leash
Refill Adapter
Printed Owner's Manual

DiveCatalog.com is an authorized Spare Air dealer and a dive shop in Irvine, California since 2003, so call 888-701-4017 or chat with us if you have questions about fit, Nitrox refilling, or compatibility with your current BC.

⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

Frequently Asked Questions

Can the Spare Air 300PK-NDG be used with Nitrox blends?

Yes. This package is Nitrox ready for blends up to 40% EAN, and the aluminum cylinder is clearly marked NITROX. It can be refilled to 3000 psi from any Nitrox SCUBA tank or air compressor using the included patented refill adapter, so it stays compatible with the gas you already dive.

How do you refill the Spare Air 300PK-NDG?

You refill it in seconds by connecting the included patented refill adapter to any Nitrox SCUBA tank or air compressor and filling to 3000 psi / 207 bar.

What does the Dial Gauge add to this package?

The Dial Gauge is an upgraded pressure indicator with a face roughly 30% larger than the standard gauge, a neon yellow indicator for visibility, and readings in both PSI and BAR. It lets you confirm the cylinder is fully charged before each dive without guessing.

How often does the Spare Air 300PK-NDG need service?

It carries a one-year warranty from the purchase date, and the manufacturer requires annual maintenance plus hydrostatic testing every five years. Staying on this schedule keeps the regulator and cylinder performing reliably as a backup air source.

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Part Number	300PK-N (Nitrox package) with the separate Dial Gauge upgrade
Cylinder Capacity	3 cu ft / 85 liters
Water Capacity	30 cu in / .5 liters
Service Pressure	3000 psi / 207 bar
Length	13" / 33 cm
Diameter	2.5" / 6.4 cm
Weight	2.2 lb / 1 kg
Surface Breaths	57 (based on 1.5 liters per breath)
Cylinder Material	Aluminum, Black Anodized
Regulator Type	Balanced Single Stage
Recommended Depth Limit	Less than 100 feet
Nitrox Compatibility	Up to 40% EAN, refillable from any Nitrox SCUBA tank or air compressor
Warranty	One year from purchase date; annual maintenance and hydrostatic testing required every five years