When working in poorly lighted areas, just switch on the handy backlight feature. It automatically shuts itself off after 20 minutes to minimize battery drain. Electronic zeroing means you simply touch a single key to perfectly null out any minor pressure differences. A display HOLD key freezes the current pressure for those all-too-common situations where readings fluctuate. We even included an audible alarm to warn you of overpressure plus a visual alarm also confirms a value has been stored, eliminating the need to observe display during a duct traverse.
A new option for the Series 477 is a USB interface. Combined with the 477's datalogging capability, a user can now quickly and conveniently download the stored readings to any USB campatible device. Data manipulation can be easily accomplished in a multitude of word processing or spreadsheet programs. USB models come with a USB cable and a software CD.