ADT681-BP-DL Digital Pressure Gauge – Barometric Pressure Data Logging

August 05, 2020


The Additel ADT681-DL datalogging digital barometric pressure gauges, provide an accurate, reliable and economical solution for a wide range of pressure applications. With accuracy of 40 Pascals across the measuring range of 60 to 110 kPa they are ideal for many barometric pressure measurement application.


The ADT681-DL incorporates on-board datalogging and can be used with the free Additel Land software for setting up and retrieving results from the gauge or be used with optional Log II software for real time logging requirements.


The ADT681-DL digital pressure gauge is supplied with ISO17025 accredited calibration certificate. Zedflo is a NATA accredited facility and can provide accredited calibration for these products.


The ADT681-DL has options for measuring gauge, compound, differential, absolute and barometric pressure.


View Non Data Logging Versions

View IECEx Intrinsically Safe Versions

View IECEx Intrinsically Safe Data Logging Versions

View Panel Mount Versions

View Panel Mount Data Logging Versions


Product Selector

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  • Data storage of 21,843 records (each record includes date, time, pressure and ambient temperature)
  • Accuracy of 40 Pa across the measuring range
  • Pressure measuring range of 60-110 kPa
  • Selectable engineering units
  • Large back-lit easy to read display
  • % pressure indication with fan shaped graph scale for visual reference
  • Display flash warning when pressure over 120% of FS
  • All ADT681 gauges can perform real time logging with optional Log II software
  • IECEx certified model available
  • ISO 17025 accredited calibration certificate included



Barometric Pressure​​ 


Pressure Range







60 kPa

110 kPa


40 Pa


General Specifications





Digital Pressure Gauge

Intrinsically Safe Digital Pressure Gauge

Intrinsic Safety
European Compliance

CE marked  ​​ ​​ ​​​​ 

CE marked


EX ia IIC T4 Ga

TUR 16.0023X

(For detailed accuracy,
please see pressure range table)

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: ​​ 0% to 20% of Range: 0.02% of full scale 20% to 110% of Range: 0.1% of reading
Vacuum: 0.25% of full scale [1][2]

Gauge Types

Gauge pressure, compound pressure, absolute pressure, differential pressure, barometric pressure

Fan-shaped Graph Scale

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


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


Compensated Temperature: -10°C to 50°C

Operating Temperature: -10°C to 50°C

Storage Temperature: -20°C to 70°C

Humidity: <95%

Pressure Port

≤100 MPa: ​​ 1/4NPT male, 1/2NPT male, 1/4BSP male, 1/2BSP male, M20×1.5 male

​​ >100 MPa: ​​ 1/4HP female or 1/4HP male
 ​​​​ *1/4HP female: Autoclave F-250-C, 9/16" - 18 UNF-2B​​ 
 ​​​​ *1/4HP male: Autoclave M-250-C, 9/16" - 18 UNF-2A

Differential Pressure: Ø6 mm test hose

Other connections available per request


Battery: ​​ One 9V alkaline battery (included)

Battery life:​​ 
1. High power mode: 320 hours
2. Low power mode: 300 hours (10 readings/s), 600 hours (3 reading/s), or 4000 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)


Case material: Aluminium alloy

Wetted parts: 316L SS

Dimension: Ø110mm X 35mm depth X 176mm height (panel mount gauge: Ø140mm X 86mm depth)

Weight: 0.6kg


Protection Level: IP67(available for 681IS GP15-60K)

Vibration: 5g (20-2000 Hz)

Shock Resistance: 100g/11ms

Data Logging
(Available on with data logging option ADT681-...-DL)

Data storage: 21,843 records (each record includes date, time, pressure and temperature)

Rate: user-selectable from 1 to 99,999 second intervals


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


1 year

[1] FS = -14.5 psi
[2] Applicable ADT681-RD-CPX





  • Precision pressure measurement
  • Field gauge and switch calibration
  • Pressure safety valve (PSV) testing
  • Pressure regulator testing
  • Hydrotesting
  • Gas pressure testing
  • Pressure data logging


ADT681 Product Data Sheet

ADT681 Gauge Display Resolution

Additel Pressure Gauge Selection Guide

ADT681 User Guide