ADT 681 Digital Differential Test Gauge (Now with IECEX)

The ADT 681 digital differential pressure gauge, now with IECEX hazardous approval, provides an accurate, reliable and economic solution for a wide range of pressure applications. A selection of accuracy specifications is available to suit your budget and requirements.
The ADT 681 digital differential pressure gauge, now with IECEX hazardous approval, provides an accurate, reliable and economic solution for a wide range of pressure applications. A selection of accuracy specifications is available to suit your budget and requirements.
More Information
Features
  • Measure and source 13 T/Cs, 11 RTDs, mV, mA, Ohms, frequency and pulses
  • Accuracy to 0.01% of reading
  • Pressure via
  • external pressure modules
  • up to 70,000kPa
  • 24V loop power
  • Task management capability, upload, download and document
  • Easy to use smartphone type menu and interface
  • Rugged design for use in harsh environments
Specifications

• Model
  ADT681: Regular gauge
ADT681IS: ATEX certified intrinsically safe

• Accuracy
  681(IS)-02: 0.02% 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
681(IS)-RD: 10 to 20% of range: 0.02% of full scale
20% to 110% of range: 0.1% of reading
Vacuum: 0.25% of full scale.
(For detailed accuracy, please see pressure range table)

• Gauge Types
  Gauge pressure
Compound pressure
Absolute pressure
Differential pressure

• Fan-shaped Graph Scale
  Similar to analog dials, including pressure swing,
% indication with fan-shaped graph scale for visual reference, low/high alarm.

• 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″)

• 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 Port
  1/4NPT male, 1/4BSP male, M20×1.5 male (≤15,000 PSI)
1/4HP female or 1/4HP male(≥15,000 PSI)
*1/4HP female: Autoclave F-250-C, 9/16″ – 18 UNF-2B
*1/4HP male: Autoclave M-250-C, 9/16″ – 18 UNF-2A
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:
Ø110mm X 35mm depth X 176mm height
(panel mount gauge: Ø140mm X 86mm depth)
Weight: 0.6kg

Data Logging
  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
  CE marked
ATEX certified intrinsically safe (ADT681IS)
*(Rubber boot for ADT681 is not ATEX certified)

• Communication:
  RS232     *(Do not use the RS-232 connector in a hazardous atmosphere)

• Warranty: 1 year

 • Pressure Range

Gauge Pressure [1]

P/N

Pressure Range

Media [2]

Accuracy(%FS)

Burst
Pressure

(psi)

(bar)

V15

-15

-1.0

G

0.02 (0.05,0.1, 0.2)

GP2

2

0.16

G

0.05 (0.1, 0.2)

GP5

5

0.35

G

0.05 (0.1, 0.2)

GP10

10

0.7

G

0.05 (0.1, 0.2)

GP15

15

1.0

G, L[3]

0.02 (0.05, 0.1, 0.2)

GP30

30

2.0

G, L[3]

0.02 (0.05, 0.1, 0.2)

GP50

50

3.5

G, L

0.02 (0.05, 0.1, 0.2)

GP100

100

7.0

G, L

0.02 (0.05, 0.1, 0.2)

GP300

300

20

G, L

0.02 (0.05, 0.1, 0.2)

GP500

500

35

G, L

0.02 (0.05, 0.1, 0.2)

GP600

600

40

G, L

0.02 (0.05, 0.1, 0.2)

GP1K

1,000

70

G, L

0.02 (0.05, 0.1, 0.2)

GP2K

2,000

140

G, L

0.02 (0.05, 0.1, 0.2)

GP3K

3,000

200

G, L

0.02 (0.05, 0.1, 0.2)

GP5K

5,000

350

G, L

0.02 (0.05, 0.1, 0.2)

GP10K

10,000

700

G, L

0.02 (0.05, 0.1, 0.2)

GP15K

15,000

1,000

G, L

0.05 (0.1,0.2)

GP20K

20,000

1,400

G, L

0.05 (0.1,0.2)

1.5×

GP25K

25,000

1,600

G, L

0.1 (0.2)

1.5×

GP30K

30,000

2,000

G, L

0.1 (0.2)

1.5×

GP36K

36,000

2,500

G, L

0.1 (0.2)

1.5×

GP40K

40,000

2,800

G, L

0.1 (0.2)

1.1×

 

Compound Pressure

P/N

Pressure Range

Media

Accuracy(%FS)

Burst
Pressure

(psi)

(bar)

CP2

±2

±0.16

G

0.05(0.1,0.2)

CP5

±5

±0.35

G

0.02 (0.05,0.1,0.2)

CP10

±10

±0.7

G

0.02 (0.05,0.1,0.2)

CP15

±15

±1

G

0.02(0.05,0.1,0.2)

CP30

-15 to 30

-1 to 2

G

0.02(0.05,0.1,0.2)

CP100

﹣15 to 100

﹣1 to 7

G, L

0.02(0.05,0.1,0.2)

CP300

﹣15 to 300

﹣1 to 20

G, L

0.02(0.05,0.1,0.2)

 

Absolute Pressure

P/N

Pressure Range

Media

Accuracy(%FS)

Burst
Pressure

(psi)

(bar)

AP5

5

0.35

G

0.1 (0.2)

AP10

10

0.7

G

0.1 (0.2)

AP15

15

1.0

G

0.1 (0.2)

AP30

30

2.0

G

0.1 (0.2)

AP50

50

3.5

G

0.1 (0.2)

AP100

100

7.0

G, L

0.05 (0.1,0.2)

AP300

300

20

G, L

0.05 (0.1,0.2)

AP500

500

35

G, L

0.05 (0.1,0.2)

AP1K

1,000

70

G, L

0.05 (0.1,0.2)

AP3K

3,000

200

G, L

0.05 (0.1,0.2)

AP5K

5,000

350

G, L

0.05 (0.1,0.2)

 

Differential Pressure
P/NPressure RangeMediaAccuracy
(%FS)
Burst
Pressure
Static
Pressure
Range
(inH2O)(mbar)
DP1±1±2.5G0.05100×±10 psi
DP2±2±5.0G0.05100×±10 psi
DP5±5±10G0.0550×±10 psi
DP10±10±25G0.0520×±10 psi
DP20±20±50G0.0520×±10 psi
DP30±30±75G0.0515×±10 psi
DP50±50±160G0.05±10 psi
DP150±150±350G0.02 (0.05)50 psi
DP300±300±700G0.02 (0.05)50 psi

*Note: [1]. Sealed gauge pressure for above 1000 psi
[2]. G=Gas, L=Liquid (please specify media type when place order)
[3]. 0.02% FS for gas media only

** One year accuracy (including yearly stability) except DP1 and DP2 range
which is 0.05%FS calibration accuracy and 0.05%FS yearly stability.

• Model
  ADT681: Regular gauge
ADT681IS: ATEX certified intrinsically safe

• Accuracy
  681(IS)-02: 0.02% 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
681(IS)-RD: 10 to 20% of range: 0.02% of full scale
20% to 110% of range: 0.1% of reading
Vacuum: 0.25% of full scale.
(For detailed accuracy, please see pressure range table)

• Gauge Types
  Gauge pressure
Compound pressure
Absolute pressure
Differential pressure

• Fan-shaped Graph Scale
  Similar to analog dials, including pressure swing,
% indication with fan-shaped graph scale for visual reference, low/high alarm.

• 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″)

• 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 Port
  1/4NPT male, 1/4BSP male, M20×1.5 male (≤15,000 PSI)
1/4HP female or 1/4HP male(≥15,000 PSI)
*1/4HP female: Autoclave F-250-C, 9/16″ – 18 UNF-2B
*1/4HP male: Autoclave M-250-C, 9/16″ – 18 UNF-2A
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:
Ø110mm X 35mm depth X 176mm height
(panel mount gauge: Ø140mm X 86mm depth)
Weight: 0.6kg

Data Logging
  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
  CE marked
ATEX certified intrinsically safe (ADT681IS)
*(Rubber boot for ADT681 is not ATEX certified)

• Communication:
  RS232     *(Do not use the RS-232 connector in a hazardous atmosphere)

• Warranty: 1 year

 • Pressure Range

Gauge Pressure [1]

P/N

Pressure Range

Media [2]

Accuracy(%FS)

Burst
Pressure

(psi)

(bar)

V15

-15

-1.0

G

0.02 (0.05,0.1, 0.2)

GP2

2

0.16

G

0.05 (0.1, 0.2)

GP5

5

0.35

G

0.05 (0.1, 0.2)

GP10

10

0.7

G

0.05 (0.1, 0.2)

GP15

15

1.0

G, L[3]

0.02 (0.05, 0.1, 0.2)

GP30

30

2.0

G, L[3]

0.02 (0.05, 0.1, 0.2)

GP50

50

3.5

G, L

0.02 (0.05, 0.1, 0.2)

GP100

100

7.0

G, L

0.02 (0.05, 0.1, 0.2)

GP300

300

20

G, L

0.02 (0.05, 0.1, 0.2)

GP500

500

35

G, L

0.02 (0.05, 0.1, 0.2)

GP600

600

40

G, L

0.02 (0.05, 0.1, 0.2)

GP1K

1,000

70

G, L

0.02 (0.05, 0.1, 0.2)

GP2K

2,000

140

G, L

0.02 (0.05, 0.1, 0.2)

GP3K

3,000

200

G, L

0.02 (0.05, 0.1, 0.2)

GP5K

5,000

350

G, L

0.02 (0.05, 0.1, 0.2)

GP10K

10,000

700

G, L

0.02 (0.05, 0.1, 0.2)

GP15K

15,000

1,000

G, L

0.05 (0.1,0.2)

GP20K

20,000

1,400

G, L

0.05 (0.1,0.2)

1.5×

GP25K

25,000

1,600

G, L

0.1 (0.2)

1.5×

GP30K

30,000

2,000

G, L

0.1 (0.2)

1.5×

GP36K

36,000

2,500

G, L

0.1 (0.2)

1.5×

GP40K

40,000

2,800

G, L

0.1 (0.2)

1.1×

 

Compound Pressure

P/N

Pressure Range

Media

Accuracy(%FS)

Burst
Pressure

(psi)

(bar)

CP2

±2

±0.16

G

0.05(0.1,0.2)

CP5

±5

±0.35

G

0.02 (0.05,0.1,0.2)

CP10

±10

±0.7

G

0.02 (0.05,0.1,0.2)

CP15

±15

±1

G

0.02(0.05,0.1,0.2)

CP30

-15 to 30

-1 to 2

G

0.02(0.05,0.1,0.2)

CP100

﹣15 to 100

﹣1 to 7

G, L

0.02(0.05,0.1,0.2)

CP300

﹣15 to 300

﹣1 to 20

G, L

0.02(0.05,0.1,0.2)

 

Absolute Pressure

P/N

Pressure Range

Media

Accuracy(%FS)

Burst
Pressure

(psi)

(bar)

AP5

5

0.35

G

0.1 (0.2)

AP10

10

0.7

G

0.1 (0.2)

AP15

15

1.0

G

0.1 (0.2)

AP30

30

2.0

G

0.1 (0.2)

AP50

50

3.5

G

0.1 (0.2)

AP100

100

7.0

G, L

0.05 (0.1,0.2)

AP300

300

20

G, L

0.05 (0.1,0.2)

AP500

500

35

G, L

0.05 (0.1,0.2)

AP1K

1,000

70

G, L

0.05 (0.1,0.2)

AP3K

3,000

200

G, L

0.05 (0.1,0.2)

AP5K

5,000

350

G, L

0.05 (0.1,0.2)

 

Differential Pressure
P/NPressure RangeMediaAccuracy
(%FS)
Burst
Pressure
Static
Pressure
Range
(inH2O)(mbar)
DP1±1±2.5G0.05100×±10 psi
DP2±2±5.0G0.05100×±10 psi
DP5±5±10G0.0550×±10 psi
DP10±10±25G0.0520×±10 psi
DP20±20±50G0.0520×±10 psi
DP30±30±75G0.0515×±10 psi
DP50±50±160G0.05±10 psi
DP150±150±350G0.02 (0.05)50 psi
DP300±300±700G0.02 (0.05)50 psi

*Note: [1]. Sealed gauge pressure for above 1000 psi
[2]. G=Gas, L=Liquid (please specify media type when place order)
[3]. 0.02% FS for gas media only

** One year accuracy (including yearly stability) except DP1 and DP2 range
which is 0.05%FS calibration accuracy and 0.05%FS yearly stability.

  • Measure and source 13 T/Cs, 11 RTDs, mV, mA, Ohms, frequency and pulses
  • Accuracy to 0.01% of reading
  • Pressure via
  • external pressure modules
  • up to 70,000kPa
  • 24V loop power
  • Task management capability, upload, download and document
  • Easy to use smartphone type menu and interface
  • Rugged design for use in harsh environments