ADT681 Digital Pressure Gauge

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.

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 (standard)

Request Product Price

Please select the options you require for the ADT681 Digital Pressure Gauge in your application and request a quote.