Absolute pressure gauge ADT681A

relativedifferentialwith LCD display

Presentation

• Additel 681A series digital pressure gauge
• Pressure ranges up to 60,000 psi (4,200 bar)
• Accuracy 0.02% or 0.05% FS depending on model
• Measures gauge, absolute, differential and barometric pressure
• Pressure % display with bargraph style indicator
• Fully temperature compensated accuracy (-10…50°C)
• Bluetooth communication and compatible with Additel Link mobile app
• Large easy-to-read display with backlight
• Intrinsic safety version available (ADT681AEx)
• Optional data logging (up to 10,000,000 records)
• Ingress protection IP67

Durable
The housing is stainless steel 304 with anti-static PET front and PTU rubber boot. Optimized internal sensor design, shock and vibration resistance (5 g vibration, 10 g shock) and corrosion-resistant wetted parts. IP67 rating for use in dusty and wet environments.

Easy to use
Ergonomic button interface and menus, readable in direct sunlight, backlight activated by button, large characters for distance readability, practical functions: TARE, time display, peak values (max/min), leak test, recording status display.

Easy to maintain
Membrane buttons easy to clean. Long battery life and reduced maintenance requirements.

Specifications (main table excerpt)
ADT681A | ADT681AEx
Description: Digital pressure gauge | Intrinsically safe digital pressure gauge
Intrinsic safety: CE marking; ADT681AEx: EU: II 1G EX ia IIC T4 Ga at -20…50°C; North America: CLASS I DIVISION 1 GROUP A,B,C,D T4; Zone 0 AEx ia IIC T4 Ga at -20…50°C; International: EX ia IIC T4 Ga at -20…50°C
Measurement range: Up to 4,200 bar (60,000 psi)
Accuracy: 681A(Ex)-02: 0.02% of full scale; 681A(Ex)-05: 0.05% of full scale; 681A(Ex)-RD: 0% to 20% of range: ±(0.02% of full scale); 20% to 110%: ±(0.1% of reading); Vacuum: ±(0.25% FS), FS = 14.5 psi; Bourdon barometer: ±55 Pa
Gauge types: Gauge pressure, saturated/compressed pressure, calculated absolute pressure, differential pressure and barometric pressure
Multifunction features: Atmospheric pressure, ambient temperature, max/min values, TARE, leak test, % pressure display, time display, data logging status
Display: Large-angle FSTN segment LCD; three-part design; white backlight; 4- or 5-digit display (selectable); digit height 14.5 mm
Pressure units: Pa, kPa, MPa, psi, mbar, bar, kgf/cm2, %, mmH2O (4°C), mmHg (0°C), InH2O (4°C), InHg (0°C); multiple engineering water columns available; 1 user unit (USER) configurable via Additel Link
Environment: Temperature-compensated -10°C to 50°C; Operating temperature -20°C to 50°C; Storage temperature -40°C to 75°C; Humidity 5% RH to 95% RH (non-condensing); Altitude < 3000 m
Pressure port: 1/4 NPT male, 1/2 NPT male, 1/4 BSP male, 1/2 BSP male, M20 x 1.5 male; swaged port for differential pressure; for high pressure (>1000 bar) 1/4 HP male or female (Autoclave M-250-C / F-250-C referenced)
Power: 3 alkaline AA batteries; power modes: Super stable and low power with varying durations (e.g. up to 18,000 h at 1 reading/10 s in low power mode); external power via USB-C
Housing: Stainless steel 304; anti-static PET front; anti-static PTU rubber boot; Dimensions: 118 x 42 x 178 mm; Weight: 0.68 kg
Compliance: IP67 (immersion 1 m for 30 min), vibration 5 g, shock resistance 10 g, 1 m drop (without rubber boot)
Data logging: Storage up to 10,000,000 records (time+pressure) or 5,000,000 (time+pressure+temperature); logging intervals 0.1 to 99,999 s
Communication: Bluetooth, RS232 (with ATEX restrictions), USB-C
Certificate: ISO 17025 accredited calibration certificate
Warranty: 1 year

Detailed ranges (range table excerpts)
Relative ranges (example P/N): V15 = -15 psi (-1 bar), GP2 = 2 psi (0.16 bar), GP5 = 5 psi (0.35 bar), GP10 = 10 psi (0.7 bar), GP15 = 15 psi (1 bar), GP30 = 30 psi (2 bar), GP50 = 50 psi (3.5 bar), GP100 = 100 psi (7 bar), GP150 = 150 psi (10 bar), GP300 = 300 psi (20 bar), GP500 = 500 psi (35 bar), GP600 = 600 psi (40 bar), GP1K = 1000 psi (70 bar), GP1.5K = 1500 psi (100 bar), GP2K = 2000 psi (140 bar), GP3K = 3000 psi (200 bar), GP5K = 5000 psi (350 bar), GP10K = 10,000 psi (700 bar), GP15K = 15,000 psi (1000 bar), GP20K = 20,000 psi (1400 bar), GP25K = 25,000 psi (1600 bar), GP30K = 30,000 psi (2000 bar), GP36K = 36,000 psi (2500 bar), GP40K = 40,000 psi (2800 bar), GP50K = 50,000 psi (3500 bar), GP60K = 60,000 psi (4200 bar).

Included / optional accessories (excerpts)

• Included: rubber boot, 3 alkaline batteries, silicone tubes (x2) for differential models, ISO 17025 calibration certificate
• Options: magnetic hanging strap, rain protective cover, USB power adapter, Additel Acal software (Basic / Net), Additel Log II recording software, RS232 extension cable, transport cases, etc.

Features / technical specifications

• Model: ADT681A (Ex version available: ADT681AEx)
• Type: Digital pressure gauge
• Max range: up to 60,000 psi (4,200 bar)
• Accuracy: up to 0.02% FS (depending on configuration), variants 0.05% and 0.2%
• Units: multiple (Pa, kPa, MPa, psi, bar, mbar, kgf/cm2, %, mmH2O, mmHg, InH2O, InHg, user unit)
• Ingress protection: IP67
• Operating temperature: -20°C to 50°C
• Power: 3x AA; USB-C external power
• Communication: Bluetooth, RS232 (restricted in ATEX zones), USB-C
• Data storage: up to 10,000,000 records (optional)
• Housing: stainless steel 304, dimensions 118 x 42 x 178 mm, weight 0.68 kg
• Certificate: ISO 17025 calibration provided
• Warranty: 1 year