Absolute pressure gauge ADT 681 series

relativedifferentialwith LCD display

Presentation
The ADT 681 digital pressure gauge uses a microprocessor-based architecture and silicon sensors to deliver reliable, precise and cost-effective pressure measurements up to 4200 bar. Each sensor is specially aged, tested and protected prior to assembly. ADT 681 instruments feature dual numeric and graphical displays, temperature compensation and are available in standard or ATEX-certified versions (ADT 681 IS).

Main features

• Available accuracies: 0.02% / 0.05% / 0.1% / 0.2% of full scale (FS)
• Dual display: numeric and graphical (graphical display mimics analogue needle readings)
• Temperature-compensated measurements
• Selectable pressure units: up to 11 units (Pa, kPa, MPa, psi, bar, mbar, kgf/cm2, inH2O, mmH2O, inHg, mmHg, ...)
• Measurement modes: gauge (relative), absolute, dynamic, compound, differential
• High and low alarms and detection of rapid value changes
• Available as a panel-mount version
• ATEX models available (ADT 681 IS)
• Data-logging option: up to 21,000 records (date, time, pressure and temperature)

Pressure measurement — Relative pressure
Table (model | bar | media | Accuracy (%FS) | % Rd | Overload):
V15 | -1.0 | G | 0.02 (0.05; 0.1; 0.2) | N/A | 3X
GP2 | 0,16 | G | 0.05 (0.1; 0.2) | N/A | 3X
GP5 | 0,35 | G | 0.05 (0.1; 0.2) | 0.1 | 3X
GP10 | 0,7 | G | 0.02 (0.05; 0.1; 0.2) | 0.1 | 3X
GP15 | 1 | G, L | 0.02 (0.05; 0.1; 0.2) | 0.1 | 3X
GP30 | 2 | G, L | 0.02 (0.05; 0.1; 0.2) | 0.1 | 3X
GP50 | 3,5 | G, L | 0.02 (0.05; 0.1; 0.2) | 0.1 | 3X
GP100 | 7 | G, L | 0.02 (0.05; 0.1; 0.2) | 0.1 | 3X
GP150 | 10 | G, L | 0.02 (0.05; 0.1; 0.2) | 0.1 | 3X
GP300 | 20 | G, L | 0.02 (0.05; 0.1; 0.2) | 0.1 | 3X
GP500 | 35 | G, L | 0.02 (0.05; 0.1; 0.2) | 0.1 | 3X
GP600 | 40 | G, L | 0.02 (0.05; 0.1; 0.2) | 0.1 | 3X
GP1K | 70 | G, L | 0.02 (0.05; 0.1; 0.2) | 0.1 | 3X
GP2K | 140 | G, L | 0.02 (0.05; 0.1; 0.2) | 0.1 | 3X
GP3K | 200 | G, L | 0.02 (0.05; 0.1; 0.2) | 0.1 | 3X
GP5K | 350 | G, L | 0.02 (0.05; 0.1; 0.2) | 0.1 | 3X
GP6K | 400 | G, L | 0.02 (0.05; 0.1; 0.2) | 0.1 | 3X
GP10K | 700 | G, L | 0.02 (0.05; 0.1; 0.2) | 0.1 | 2X
GP15K | 1000 | G, L | 0.05 (0.1; 0.2) | 0.1 | 2X
GP20K | 1400 | G, L | 0.05 (0.1; 0.2) | N/A | 2X
GP25K | 1600 | G, L | 0.1 (0.2) | N/A | 1.5X
GP30K | 2000 | G, L | 0.1 (0.2) | N/A | 1.5X
GP36K | 2500 | G, L | 0.1 (0.2) | N/A | 1.5X
GP40K | 2800 | G, L | 0.1 (0.2) | N/A | 1.35X
GP50K | 3500 | G, L | 0.1 (0.2) | N/A | 1.2X
GP60K | 4200 | G, L | 0.1 (0.2) | N/A | 1.1X

Pressure measurement — Absolute pressure
Table (model | bar | media | Accuracy (%FS) | Overload):
AP5 | 0,35 | G | 0,1 (0,2) | 3X
AP10 | 0,7 | G | 0,1 (0,2) | 3X
AP15 | 1,0 | G | 0,1 (0,2) | 3X
AP30 | 2,0 | G | 0,1 (0,2) | 3X
AP50 | 3,5 | G | 0,1 (0,2) | 3X
AP100 | 7,0 | G, L | 0,05 (0,2; 0,1) | 3X
AP300 | 20 | G, L | 0,05 (0,2; 0,1) | 3X
AP500 | 35 | G, L | 0,05 (0,2; 0,1) | 3X
AP1K | 70 | G, L | 0,05 (0,2; 0,1) | 3X
AP3K | 200 | G, L | 0,05 (0,2; 0,1) | 3X
AP5K | 350 | G, L | 0,05 (0,2; 0,1) | 3X

Pressure measurement — Compound pressure
Table (model | bar | media | Accuracy (%FS) | Overload):
CP2 | ±0,16 | G | 0,05 (0,1; 0,2) | 3X
CP5 | ±0,35 | G | 0,02 (0,05; 0,1; 0,2) | 3X
CP10 | ±0,7 | G | 0,02 (0,05; 0,1; 0,2) | 3X
CP15 | ±1 | G | 0,02 (0,05; 0,1; 0,2) | 3X
CP30 | -1 to 2 | G | 0,02 (0,05; 0,1; 0,2) | 3X
CP100 | -1 to 7 | G, L | 0,02 (0,05; 0,1; 0,2) | 3X
CP150 | -1 to 10 | G, L | 0,02 (0,05; 0,1; 0,2) | 3X
CP300 | -1 to 20 | G, L | 0,02 (0,05; 0,1; 0,2) | 3X

Pressure measurement — Differential pressure
Table (model | bar | media | Accuracy (%FS) | Overload | Static pressure):
DP1 | ±2,5 | G | 0,05 | 100X | 700 mBar
DP2 | ±5,0 | G | 0,05 | 100X | 700 mBar
DP5 | ±10 | G | 0,05 | 50X | 700 mBar
DP10 | ±25 | G | 0,05 | 20X | 700 mBar
DP20 | ±50 | G | 0,05 | 20X | 700 mBar
DP30 | ±75 | G | 0,05 | 20X | 700 mBar
DP50 | ±160 | G | 0,05 | 20X | 700 mBar
DP100 | ±250 | G | 0,05 | 20X | 1 Bar
DP150 | ±350 | G | 0,02 (0,05) | 20X | 3,5 Bar
DP300 | ±700 | G | 0,02 (0,05) | 20X | 3,5 Bar

Barometric pressure
BP | measurement range 60 HPa to 1100 HPa | Media G | Accuracy 40 Pa | Overload 3X

Additional specifications
Available pressure units: Pa, kPa, MPa, psi, bar, mbar, kgf/cm², inH2O@4°C, mmH2O@4°C, inHg@0°C, mmHg@0°C.
Connection port: 1/4 NPT male, 1/2 NPT female, 1/4 BSP male, M20×1.5 male (≤ 1000 bars), 1/4HP female or 1/4HP male (≥ 1000 bars). Differential pressure test hose Ø6 mm. Other connections on request.

General specifications
Dimensions L x W x H: Ø110 mm x 35 mm x 176 mm. Panel mount case: Ø140 mm x 86 mm.
Weight: 0.6 Kg.
Display: LCD, 5-digit resolution, digit height 16.5 mm. Refresh rate: 3 readings/s (adjustable 1 to 10 readings/s).
Housing: Aluminium. Capillary fittings: 316L SS.
Power supply: 9 V battery included. Battery life: 300 h (10 readings/s), 600 h (3 readings/s), 6000 h (1 reading / 10 s). Auto power-off after 60 minutes (deactivatable). Option: external power 110/220 V (do not use in explosive atmospheres).
Communication interfaces: RS-232 (do not use in explosive areas).

Environmental specifications
Reference conditions: 23°C ±3°C (RH < 95% non-condensing).
Operating range: -10 to +50°C.
Storage conditions: -20°C to +70°C.

Characteristics / technical specifications

• Commercial model: ADT 681
• Brand: ADDITEL
• Maximum measurement range: up to 4200 bar (depending on GP60K version)
• Accuracy levels: 0.02% / 0.05% / 0.1% / 0.2% FS
• Measurement modes: gauge, absolute, compound, differential, dynamic
• Dual display: numeric + graphical
• Data logging: optional, up to 21,000 records (date, time, pressure, temperature)
• Power: 9 V battery (supplied) or optional external power
• Materials: aluminium housing, 316L SS fittings
• Operating temperature: -10 to +50°C