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The DPI 740 is a portable battery powered precision barometer, providing outstanding capabilities in a hand held package. The fundamental sensor technology employed within this instrument is the Druck resonant pressure transducer (RPT).
This vibrating element sensor not only provides accuracies of ±0.004 inHg (±0.15 mbar) but equally important has a calibration stability of better than 100 ppm per year. The DPI 740 is widely used in laboratory and remote field applications for precision pressure reference.
Key Features |
Accuracy: ±0.004 inHg (±0.15 mbar) absolute |
Ranges to 103 inHg (3.5 bar) absolute |
Six digit resolution LCD display |
Multiple pressure scales and aeronautical units |
Alkaline or rechargeable batteries |
Lightweight hand-held rugged design |
RS232 output |
Specifications | |
Druck DPI 740 Portable Precision Barometer | |
Feature | Parameter |
Operating Ranges | 22 to 34 inHg (750 to 1150 mbar) absolute 1 to 38 inHg (35 to 1310 mbar) absolute 1 to 77 InHg (35 to 2620 mbar) absolute 1 to 103 inHg (35 to 3500 mbar) absolute |
Maximum Safe Working Pressure | 130 inHg (4375 mbar) absolute |
Pressure Media | Compatible with non-corrosive gases Insensitive to media density |
Readout and Display | 999999 capability LCD digits 0.54 in (13.6 mm) high with additional 16 text characters. |
Display Overload | Instrument capable of nominal 110% full scale (FS) for each range. Above this, error code will flash. |
Resolution | 0.0003 inHg (0.01 mbar) |
Response | 2 readings per second nominal on digital display |
Operating Modes | Local pressure (QFE) Sea level pressure (QFF) from user set height Altitude above user set datum |
Process Features | Maximum/Minimum, tare and programmable filter available in all operating modes. |
Pressure Units | 24 pressure units plus altitude in feet (ft) or meters (m) |
Accuracy | ±0.02% FS For all pressure ranges includes: Combined non-linearity, hysteresis, repeatability, and temperature effects over 15°F to 120°F (-10°C to 50°C). |
Stability | Better than 100 ppm per annum. |
Temperature Range | Operating: 15°F to 120°F (-10°C to 50°C)
-40°F to 160°F (-40°C to 70°C) |
Safety | Electrical and mechanical safety: EN61010 EMC emissions: EN50081-1 EMC immunity: EN50082-1 Certification: CE Marked |
Position Effect | Negligible |
Power Supply | Three each 1.5 V alkaline AA batteries for 20 hours nominal continuous operation Programmable power down prolongs battery life Battery low indicated by display symbol Optional rechargeable NiCad batteries and external power adapter/charger unit available (see Option B). |
Communication Interface | RS232 via six-way LEMO socket (see Option C) |
Pressure Connection | Accepts 1/4 in OD / 5/32 in ID tubing (6 mm OD / 4 mm ID) |
Weight | 1.1 lb (0.5 kg) nominal |
Specifications | |
Druck DPI 740 Portable Precision Barometer | |
Model Overview | |
Model | Description |
DPI-740-34 | Druck DPI-740-34 22 to 34 inHg Portable Precision Barometer Range: 22 to 34 inHg (750 to 1150 mbar) absolute |
DPI-740-38 | Druck DPI-740-38 1 to 38 inHg Portable Precision Barometer Range: 1 to 38 inHg (35 to 1310 mbar) absolute |
DPI-740-77 | Druck DPI-740-77 1 to 77 inHg Portable Precision Barometer Range: 1 to 77 InHg (35 to 2620 mbar) absolute |
DPI-740-103 | Druck DPI-740-103 1 to 103 inHg Portable Precision Barometer Range: 1 to 103 inHg (35 to 3500 mbar) absolute |