Additel ADT 681 – GP300 psi 0.05% Accuracy Series Digital Pressure Gauge

ADT681 0 psi to 300 psi Digital Pressure Gauge – 0.05% Accuracy -1/4 Male NPT

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SKU: ADT681-05-GP300-PSI-N Category:

Product Overview: Additel ADT 681 – GP300 psi 0.05% Accuracy Series Digital Pressure Gauge

Additel ADT 681 GP300psi

With advanced microprocessor technology and state-of-the-art silicon pressure sensors, ADT681 series digital pressure gauges provide an accurate, reliable, and economic solution for a wide range of pressure applications. They are loaded with functionality and remarkably easy to use.

To reach the best performance, every silicon pressure sensor in our gauges is specially aged, tested and screened before assembly. ADT681 series digital pressure gauges are unmatched in performance and reliability. Best of all, they are very affordable.


• Pressure ranges to 36,000 psi (2500 bar)

• 0.05% full scale accuracy (ADT 681-05)

• Fully temperature compensated accuracy from14°F to 122°F (-10°C to 50°C)

• Up to eleven selectable pressure units

• Large, easy to read display with 5-digit resolution

• Back lighted 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

• ATEX certified intrinsically safe (Model ADT 681IS)

• NIST traceable calibration with data(included)

• 9V battery power or AC adapter (optional)


• Precision pressure measurement

• Field gauge calibration

• Pressure safety valve (PSV) testing

• Pressure regulator testing


• Model

ADT 681: Regular gauge

ADT 681IS: ATEX certified intrinsically safe

• Accuracy

ADT 681(IS)-02: 0.025% of full scale

ADT 681(IS)-05: 0.05% of full scale

ADT 681(IS)-10: 0.1% of full scale

ADT 681(IS)-20: 0.2% of full scale

(For detail 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℃, mmH2O@4℃, inHg@0℃, mmHg@0℃

• 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)

*0.025%FS accuracy guaranteed only over the ambient temperature range of 68°F to 79°F (20°C to 26°C)

Storage Temperature: -4°F to 158°F (-20°C to 70°C)

Humidity: <95%

• Media Compatibility

0 – 30 psi: Clean dry non-corrosive gases

50 – 36,000 psi: media compatible with 316L SS

• Pressure Port

1/4” NPT male, 1/4” BSP male, M20×1.5 male (≤15,000 PSI)

1/4” HP female or 1/4” HP male(>15,000 PSI)

1/4’HP female: Autoclave F-250-C, 9/16′ – 18 UNF-2B
1/4’HP male: Autoclave M-250-C, 9/16′ – 18 UNF-2A

0.156 inch (Ø4 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: Φ110mm X 35mm depth X 176mm height
(panel mount gauge: Φ140mm X 86mm depth)

Weight: 0.6kg

• Intrinsic Safety and European Compliance

CE marked

ATEX certified intrinsically safe (ADT 681IS)

• Communication

RS232 (Do not use the RS-232 connector in a hazardous atmosphere)

• Warranty

1 year


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