The ADT681 digital pressure gauge family covers a wide range of pressures from as low as 1 inH20 differential to as high as 40,000 psi gauge. The ADT681 be installed directly to pipework via a male threaded port, or a back facing port for the panel mount version.
Contents
Demo Video
Features
- Pressure ranges to 40,000 psi (2800 bar)
- 0.02% full scale accuracy (681-02)
- 0.05% full scale accuracy (681-05)
- 0.1% full scale accuracy (681-10)
- 0.2% full scale accuracy (681-20)
- 0.1% reading scale accuracy (681-RD)
- Fully temperature compensated accuracy from
- 14°F to 122°F (-10°C to 50°C)
- Up to eleven selectable pressure units
- Large, easy to read display with 5-digit resolution
- Backlit display
- % pressure indication with fan-shaped graph scale
- for visual reference
- Display flash warning when pressure over 120%
- of FS
- Bottom mount or panel mount
- Environment Protection: IP67
- ATEX certified intrinsically safe (Model 681IS)
- NIST or UKAS traceable calibration with data(included)
- 9V battery power or AC adapter (optional)
- Data logging to 21,843 records (includes date, time,
pressure and temperature)(optional)
Specifications
Model
- ADT681: Regular gauge
- ADT681IS: ATEX certified intrinsically safe
Accuracy
- 681(IS)-02: 0.025% of full scale
- 681(IS)-05: 0.05% of full scale
- 681(IS)-10: 0.1% of full scale
- 681(IS)-20: 0.2% of full scale
- (For detailed accuracy, please see pressure range table)
Gauge Types
- Gauge pressure
- Compound pressure
- Absolute pressure
- Differential pressure
- Panel mounted with rear pressure port
Display
- Description: 5 full digit FSTN LCD
- Display rate: 3 readings per second (Default setting).
- Adjustable from 10 readings per second to 1 reading every ten seconds
- Numeral display height: 16.5mm (0.65″)
Fan-shaped Graph Scale
- Similar to analog dials, including pressure swing, % indication with fan-shaped graph scale for visual reference, low/high alarm.
Pressure Units
- Pa, kPa, MPa, psi, bar, mbar, kgf/cm2, inH2O 4°C mmH2O 4°C, inHg 0°C, mmHg 0°C
Environmental
- Compensated Temperature: 14°F to 122°F (-10°C to 50°C)
- Operating Temperature*: 14°F to 122°F(-10°C to 50°C)
- Storage Temperature: -4°F to 158°F (-20°C to 70°C)
- Humidity: <95%
Pressure Ranges
The ADT681 is available in the following ranges:
- 0…2 to 0…40000 psi gauge
- 0…5 to 0…5000 psi absolute
- -2…+2 to -15…300 psi compound gauge
- -1…+1 to -300…+300 inH2O differential
Notes:
- Sealed gauge pressure for above 1000 psi
- G=Gas, L=Liquid (please specify media type when place order)
- 0.025% FS for gas media only
Pressure Port
- 1/4NPT male(≤15,000 PSI)
- 1/2NPT male(≤15,000 PSI)
- 1/4BSP male(≤15,000 PSI)
- M20×1.5 male (≤15,000 PSI)
- 1/4HP female, Autoclave F-250-C, 9/16″ – 18 UNF-2B (>15,000 PSI)
- 1/4HP male, Autoclave M-250-C, 9/16″ – 18 UNF-2A (>15,000 PSI)
- 0.236 inch (Ø6 mm) test hose (for differential pressure)
- Other connections available per request
Power
- Battery: One 9V alkaline battery (included)
- Battery life: 300 hours (10 readings/s), 600 hours (3 reading/s), or 6000 hours (1 reading/10s)
- Power auto-off: 60 minutes power auto-off. Auto-off may be disable
- External power: 110/220V external power adapter (optional) *(Do not use the external power adapter in a hazardous atmosphere)
Enclosure
- Case material: Aluminum alloy
- Wetted parts: 316L SS
- Dimension: Ø 110mm x 35mm depth x 176mm height (panel mount gauge: Ø140mm x 86mm depth)
- Weight: 0.6kg
Data Logging (optional)
- Data storage: 21,843 records (each record includes date, time, pressure and temperature)
- Rate: user-selectable from 1 to 99,999 second intervals
Intrinsic Safety and European Compliance (optional)
- CE marked
- ATEX certified intrinsically safe (ADT681IS)
Communication
- RS232 *(Do not use the RS-232 connector in a hazardous atmosphere)
Ordering Information
Part Number Configuration
Accessories Included
- Rubber boot (Except panel mount gauges)
- 9V alkaline battery (1 pc)
- Manual
- NIST traceable calibration certificate
Optional Extras
Product Help
0-10 inH2O & 0-0.36 psi reading
I am interested in the ADT681 for measuring a range of 0 to 10″ wc. It will be mostly used between 0.01″ to 6.00″. Can the display read in English units of inches of water and psi?
Yes you can read in inH2O or psi, and the -10 to +10 inH2O differential range would be the one to choose for this application.
+/-20inH2O dp measurement
Can the ADT681 measure differential pressure +/- 20″ water gage?
The ADT681 has the option for a -20 to +20 inH2O range which will measure negative or positive differential pressure.
Testing negative pressure of 155 pascal
We have some fabrications to be tested to a negative pressure of 155 pascal / 0.022PSI, is it possible to supply the ADT681 in suitable calibrated range?
Yes, the lowest range possible with the ADT681 is -2.5 to +2.5 mbar (+/-250 Pa) differential.
Dust control system survey
I’m looking for a low range digital manometer with a range up to 4 hPa gauge to be used for surveys on dust control systems.
We would suggest the ADT681 with a standard pressure range of -5 to +5 mbar differential, which can laso be used as a gauge pressure range if the negative pressure port is left unconnected and vented to atmospheric pressure.
- SKU ID: s1-adt681-0001
- Model: Standard version (ADT681)
- Pressure Range: -5 to +5
- Units: mbar
- Range Type: Differential (-DP to +DP)
- Accuracy (% full scale): 0.05
- Media Type: Gases
- Process Connection: 0.236 inch (Ø6 mm) test hose fitting
- Calibration Certificate: UKAS/NIST (standard)
Related Documents
Specification data sheet
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