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ADT681 Digital Pressure Gauge

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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
  • Specifications
      • Model
      • Accuracy
      • Gauge Types
      • Display
      • Fan-shaped Graph Scale
      • Pressure Units
      • Environmental
      • Pressure Ranges
      • Pressure Port
      • Power
      • Enclosure
      • Data Logging (optional)
      • Intrinsic Safety and European Compliance (optional)
      • Communication
  • Ordering Information
      • Part Number Configuration
      • Accessories Included
      • Optional Extras
  • Product Help
    • 0-10 inH2O & 0-0.36 psi reading
    • +/-20inH2O dp measurement
    • Testing negative pressure of 155 pascal
    • Dust control system survey
  • Related Documents
    • Specification data sheet

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

ADT681 Gauge Ref

  • Differential pressure

ADT681 Differential

  • Panel mounted with rear pressure port

ADT681 Panel Mount

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

ADT681 Display Screen

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

adt681-gauge-pressure-ranges

Notes:

  1. Sealed gauge pressure for above 1000 psi
  2. G=Gas, L=Liquid (please specify media type when place order)
  3. 0.025% FS for gas media only

adt681-absolute-pressure-ranges

adt681-differential-pressure-ranges

adt681-compound-pressure-ranges

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

adt681-part-no-coding

Accessories Included

  • Rubber boot (Except panel mount gauges)
  • 9V alkaline battery (1 pc)
  • Manual
  • NIST traceable calibration certificate

ADT681 Rubber Boot

Optional Extras

adt681-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

  • ADT681 pdf product data sheet

Request Product Price

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Model
Enter the pressure range you would like to measure over.
Units
Range Type*
Some range types may have limited accuracy options and may only be used on gases
Range Type*
Some range types may have limited accuracy options and may only be used on gases
Accuracy (% full scale)
Some accuracies may not be available for certain pressure ranges and use with liquids.
Media Type*
Some pressure ranges and accuracies may not be available for use with liquids
Process Connection*
Process Connection
Process Connection
Optional Extras
Optional Extras
Please enter info about your application and include any other requirements.


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