This unit is identical to #48250 in all aspects except that the expanded scale Magnehelic gauge has been replaced with a 0.3" inclined red oil manometer. The slow movement of the bright read fluid in the curved tube greatly enhances taking accurate breathing effort measurements. Technicians who are novices to flowbench operations find this instrument exceedingly easy to use with a minimum of practice. See general description of a "Flowbench Specifications" section for more data on the operational and physical properties of the apparatus. Pressure Ratings: Up to 5,000 psi (34,475 kPa) inlet; Regulated output test pressures: 100 - 4,500 psi to Test Stand. Air Supply: From air storage bank, industrial bottle, or scuba tank; 5-ft hose and yoke assembly provided. Pressure Gauges: Inlet - 5,000 psi (34,475 kPa) 2.5" face, 2% accuracy; Output - 5,000 psi, 4.5" face; 1% accuracy; Regulator Intermediate Pressure - 300 psi (2068 kPa) 4.5" face, 1% accuracy. Flowmeter: Floating ball type - 0-30 SCFM (Standard cu. ft./min. or 840 liters / min.). Breathing Effort Gauges: High effort mode - Dual scale (+ & -) 0 - 5 inches water column across 4" face; Expanded mode - 0-3 inches water column across 4" face or 0-3" red oil inclined manometer (#48251 only). European model #48260 - 1.5 kPA dual scale and 500 Pa expanded scale gauges respectively. Shop Air: Supplied at 50 - 100 psi by a special integrated regulator to an outlet coupler; 4-ft hose and blowgun included. Electrical: 110 VAC / 60 cycles or 220 / 240 VAC / 50 cycles (#48260). Accessories: Instruction manual covers the installation, maintenance, and use; complete description of testing procedures and parameters included. All required adapters provided. Shipping Weight: 90 lbs