Review on 🚗 GSPSCN 150Psi Portable Digital Car Tire Inflator with Auto Shut-Off & LED Light - Heavy Duty Double Cylinders 12V Air Compressor Pump for Auto, Truck, Car, Bicycles, RV, SUV, Balls (Titanium) by Eric Mueller

The GSPSCN Air Compressor is a handy piece of equipment, but it does not meet some of the manufacturer's stated specifications. I tested the device with a similar air compressor that I've been using for the past 2 years to inflate my Jeep tires after going off-road. The context of my opinion is as if the device is used to inflate tires. I have attached a table to compare two equivalent compressors. Read on to learn more about my experience. Test Conditions: I deflated my Rubicon Jeep 35-inch tires to 15psi, which is typical for off-road driving, and inflated to 35psi, normal road pressure and timed the inflation time, all at sea level. I connected the power supply directly to the battery with alligator clips and ran the motor on 14.4V DC. I measured the air pressure separately with 2 different sensors, both of which matched the pressure. CFM OUTPUT: As shown in the table below, the manufacturer claims a capacity of 2.47 cubic feet per minute (CFM). Comparing the inflation times of two compressor tires, the GSPSCN takes 2 minutes longer than the Master Flow, which has the same CFM rating has. Then, a little arithmetic shows that the GSPSCN delivers more CFM, about 1.6 CFM, which is significantly lower than its competitor.- HIGH ACCURACY: Again, when the tire is inflated to the set limit of 35lbs, the device stops at this value, however, the actual tire pressure was 32 psi. The accuracy of 1% specified by the manufacturer is closer to 8%. -- LONG TIRE INFLATION TIME: Again, it's important that this is done quickly as I inflate tires after terrain as all 4 tires need to be inflated between 15-35psi. GSPSCN took 5 minutes 34 seconds to inflate the tire while competitor Master Flow was significantly quicker at 2 minutes per tire with 3 minutes 30 seconds. Worse, given the GSPSCN limit of 20 minutes run with 20 minutes rest, you have to wait 20 minutes before filling your last tire. -- SHORT AIR HOSE: The air hose is too short to reach the rear wheels as the compressor is located in the center front of the jeep as shown. In this position, the air hose does not reach the rear wheels. The electrical cable is long enough to move the compressor, but this is not necessary if the air hose is long enough, as is the case with the Master Flow unit. -- IGNITE. When I inserted the cigarette lighter plug into the alligator clip socket, the plug popped out and broke electrical contact. After firmly inserting and rotating the socket, it seemed to stay in place. This is a poor electrical connection or a resistance higher than required for high currents. -- WITHOUT AIR CLEANER: Most places I would use an air compressor are dusty and dirty. There is no indication that the device has a working air purifier. GOOD: -- NOT HOT: No hot spots to burn yourself. Even after 10 minutes of running, the 4 cylinder heads are well protected and the air outlet is at the end of a rubber hose so it never gets too hot. -- WORKS AT 12V: Although the instructions say to start the engine to keep the battery voltage closer to 14.4V, I started the unit without the engine running and with the battery at 11.9V and the same fill time of 5.5 minutes as achieved it ran at 14.4v - AUTO-STOP WORKS: The auto-stop is a nice feature so you don't have to constantly monitor the pressure. It ran and stopped at the setting I specified, but as I mentioned, it stopped 3psi less than the actual tire pressure. Knowing this, you can simply set the 3 PSI level higher, but this is clearly not within the 1% accuracy specified by the manufacturer. -- RELATIVELY QUIET: I measured 82 dBa at 3 feet from the compressor. The main stream measured 84 dBa. While the manufacturer claims it's quiet, that's a very relative statement as it's not at all quiet, but compared to an oil-free air compressor it's good. For example, a diesel train going 45 mph at 100 feet is 83 dB, a mixer is 88 dB, and a garbage truck is 80 dB. .Master Flow MF-1050 .GSPSCN 6085XX17" Tire Measured Inflation Time (15 to 35 psi sea level) 0.3 min 25 s 0.5 min 34 s Declared Flow Rate (CFM) 0.2,54 0.2, 47 Run Time on/off (min) .20 /20 .20/10Automatic pressure setting .no .yes Manufacturer declared accuracy .NA .1% Measured accuracy .NA .-3 lbs or 8.5% volume (dBA) at 3 feet .84 .82 Air Hose Length (ft) .16 .11.5 Weight (lbs) .10.25 .7.15 Carry Case .Yes .Yes Needle Adapter .Yes .Yes 321 .23 Flashlight .No .YesAir Filter .Yes .No Warranty .3 Years .1 Year CONCLUSION: The GSPSCN The air compressor has proven to be a very lightweight, low CFM, and over-spec unit in manufacturer's testing to fill a single Jeep tire at 15-35psi. Ultimately, I think Master Flow is a much better choice, especially with a 3 year warranty compared to 1 year for GSPSCN.