Wow! A air pump that shuts off when it reaches 3.6PSI!

Pricey $128USA SEAMAX GP-80D Speedy Air Pump for the deluxe digital model, the standard model is cheaper.

How the pump works:

When the pump starts it will be on a HIGH VOLUME (Turbine) pump until the pressure reaches 2 PSI. Then the pump will automatically switch over to the HIGH PRESSURE (Piston) pump and inflate the boat to its set pressure . Once reaching the set pressure the pump will automatically turn itself off.
Island Inflator pumps come in 2 different models: Standard and Deluxe


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Standard Model Features include:
High Speed, High-Pressure pump.
Automatic Stop when chosen pressure is reached
Reliable combination of Turbine & Piston to reduce wear
12 Volt lead with alligator clips
All necessary valve adaptors included
Carry Bag with storage compartments

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Deluxe Model Features include:
Includes all the same features as the Standard model including extras like:
Internal Battery, allowing to take this pump anywhere
Digital Pressure setting screen
Digital screen also shows how much air pressure is in the tubes
Smaller pressure setting increments
240V Internal battery charger

Takacat Explorer Open model looks like a great dive or fishing platform, it has lots of room!

But it's home company is based in New Zealand with a USA contact.  Shipping from New Zealand to the USA will most likely be an expense you will have to really think about.  They mention that their boats are manufactured in China and they use the thicker PVC and give you choice of Hypalon.

Go here and take a peek:
http://www.takacat.com/21.html