Salter Labs Pro2 Check Elite Ultrasonic Oxygen Indicator Features and Benefit Oxygen Concentration Measured in Percent (Main Clinic Supply) recommends Oxygen Purity for ALL stationary and portable oxygen concentrators be above 90%. We see many that are way below! Check it with this very easy tool and make sure ABOVE 90%! *Quickly and Easily Determine if Concentrators are *Performing to Expectations *Ultrasonic Technology is Highly Accurate *Operates on an 9 Volt Battery *Calibrated Out of the Box *Calibration Unaffected by Temperature or Altitude *Comes with a Fashionable Carrying Case *Automatic Shut-Off After 5 Minutes to Preserve Battery Life *Salter Labs Pro2 Check Elite Ultrasonic Oxygen Indicator Specifications Product Number: PRO2 Elite-1 Concentration Mode: Display Range: 20.9% - 100% Accuracy: +/- 2% Linearity: +/- 2% Full Scale Response Time: 10 Seconds
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