Haskel Mini Sport Booster

In Stock
The Mini Sport Booster from Haskel is designed for diving applications that demand performance, reliability and safety at an affordable price. The oil-free Mini Sport Booster is a compressed air driven, air cooled, non-lubricated, reciprocating piston, single stage type

Prices include FREE continental 48 U.S. shipping!

Booster prices do NOT include international shipping, or shipping to Alaska, Hawaii, APO/FPO, or U.S. Territories.

Haskel Mini Sport Booster

Haskel Mini Sport Booster
Haskel Mini Sport Booster Top View Cleaned for 100 % Oxygen Service Lubrication Instructions on Side Inlet Port Side View Haskel
  • Portable, reliable and affordable - weight 12 lbs
  • Factory cleaned by Haskel for 100% Oxygen Service
  • Fill up to 3300 psi - boost with pressures of 100 psi
  • Locking Speed Control Sound Muffler
  • Total Separation of Supply Gas and Drive Gas

The approximate size ratio of the { 4 in | 10.1 cm } air drive piston to the gas piston is 25:1. Nitrox Ready, the Mini Sport Booster is factory cleaned by Haskel for 100% Oxygen Service. As delivered, you can use it to boost pure oxygen, but it can also boost pure helium, pure air, as well as nitrox and trimix mixtures of those gases. (Note that depending on the physical properties of the gas being boosted, efficiency and fill times can vary considerably from those of pure oxygen.) The boosters from Dive Gear Express are also factory fresh production.

The very small size { 14 in L x 6 in W x 6.5 in H | 35.6 cm W x 15.2 cm H x 16.5 cm D } and weight { 12 lb | 5.4 kg } allow it to be conveniently transported. The Mini Sport Booster can fill cylinders up to 3300 psi and it can boost with source gas pressures as low as 100 psi. Popular with technical and rebreather divers, the Mini Sport Booster allows deco bottles, oxygen and diluent rebreather cylinders to be filled when low pressure compressed air is the only source of power available. Operating with a drive air pressure of just 140 psi means it can be supplied by the LP port of a typical SCUBA first stage regulator and tank.


Take a look at the fill times in the table below. For example, starting with a supply pressure of just 1000 psi, to fill an AL-19 cylinder to 3000 psi takes just 3 minutes. The Haskel Mini Sport Booster is reliable too, with a one year factory warranty. The Haskel name in boosters has long been recognized for their quality.

  • Low Weight Portability
  • Locking Speed Control Sound Muffler
  • Relief Valve for Integrated Air Drive Protection
  • Integrated Cooling Jacket for Extended Seal Life
  • Total Separation of Supply Gas and Drive Gas
  • Cleaned for Oxygen Service

For maximum flexibility, the Haskel Mini Sport Booster is offered in a "naked" configuration, less fittings and hose assemblies. For our model number MSB-9000, the inlet and outlet gas ports accept standard SAE/UNF 9/16"-18 fittings and the drive gas inlet accepts a standard NPT 1/2"-14 fitting. Dive Gear Express offers optional fitting and hose kits.

Your Haskel Mini Sport Booster also ships with a factory hardcopy documentation package: Operating and Maintenance Manual including illustrated parts breakdown, Oxygen Usage - Best Practice Guide, test procedures, and a Certificate of Cleaning for oxygen service.

Fill Time Examples Boost Time after Equalization to 19 Cu Ft Tank (Min:Sec)

Supply Pressure Target Fill Pressure
2400 psi 3000 psi
500 psi 4:31 6:00
1000 psi 1:44 3:00
1500 psi 0:33 1:31
2000 psi 0:12 1:00
2400 psi 0:00 0:32
More Information
Brand Haskel
SKU HK-9000
Weight 18.000000


How do the grades of compressed oxygen differ?

There are three grades of compressed oxygen gas widely sold in returnable supply cylinders: Aviation (aka ABO), Medical, and Industrial (aka Welding). The gas itself is normally produced using cryogenic separation of air, resulting in a gas that is very close to pure oxygen: > 99.5% with the balance being inert gases, mostly argon. Nearly all oxygen sold in the US is what is known as USP quality, meeting or exceeding United States Pharmacopeia quality standards for human consumption. As a practical matter, the differences in the three grades as sold today are not quality of the oxygen being put in the cylinder but rather the procedure used to fill the cylinder and, in the case of Medical grade, licensing or documentation requirements.

Industrial grade oxygen cylinders can be just topped up when refilling and, although unlikely, could be contaminated with other unknown gases that might have back-flowed into the cylinder during use or filling. Aviation and Medical grades must have the cylinder completely evacuated before every fill and each batch is tested for purity. Medical grade oxygen is legally regulated in the US by the Food and Drug Administration and filling a cylinder for medical use incurs some FDA licensing and documentation requirements for the cylinder fill station operator.

Medical oxygen is considered a drug, and thus requires a doctors prescription for the FDA licensed fill station operator to fill the cylinder. The FDA has granted an exception to the prescription requirement for medical cylinders marked as emergency use only, but they still should only be filled with USP quality oxygen and following FDA guidelines. To blend breathing gas mixtures for Nitrox and technical diving, most blenders use Aviation grade oxygen to avoid the FDA licensing and documentation requirements yet still use an oxygen grade suitable for human consumption.

Among divers, perhaps the most often debated topic about oxygen grades is should industrial grade oxygen be used for SCUBA applications. That's because welding oxygen is relatively cheap and brand name compressed gas suppliers usually fill oxygen cylinders from the same high quality source while following best practices regardless of grade. However, small welding supply operations are more likely to just top up their industrial grade oxygen cylinders from a local bulk supply and may not follow best practices. Unless the entire supply chain for each and every cylinder of oxygen can be trusted with absolute certainty, in our opinion using industrial grade oxygen for diving applications is a needless risk.

For much more detail about types of oxygen, especially recommendations regarding applications found in diving and diving emergencies, read Oxygen: Concentrations, Grades, and Labels by Larry "Harris" Taylor, Ph.D.

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