477B-4

477B-4 is a series 477B handheld digital manometer. It is a versatile, hand-held, battery operated manometer. It measures either positive, negative or differential pressures with ±0.10% of full-scale accuracy. A memory function allows storage of up to 40 readings for later recall and a backlight provides auxiliary lighting for hard-to-see locations. Also standard is a hold feature; plus both visual and audible overpressure alarms. Typical applications include lab calibration of other pressure instruments and air velocity/air flow measurements in commercial buildings.

• Range 0 to 10.00psi
• Precise 0.1% FS accuracy provides four times better accuracy than most standard manometer/gages
• Aluminum housing protects instrument against damage
• 4-digit LCD display
• 9V alkaline battery included
• Two barbed connections for use with 1/8˝ or 3/16˝ I.D. tubing