ADT685EX Digital Pressure Gauge – Intrinsically Safe Absolute Pressure Datalogging

ADT685EX Digital Pressure Gauge – Intrinsically Safe Absolute Pressure Datalogging

Conquer pressure measurement challenges with our advanced digital pressure gauge, featuring a touch screen interface, safety valve test, leak test, and Bluetooth functionality, ensuring precise readings in any scenario.



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Looking for the most advanced, best performing and modern digital pressure gauge on the market? Congratulations, you’ve just found it! Additel’s ADT685 digital pressure gauges are in a class of their own with an amazingly easy to use and read touchscreen display. The all new modern menu structure and control interface bring a new and refreshing experience to gauge work.  With microprocessor technology, state-of-the-art silicon pressure sensors and plenty of onboard storage capacity, these attractive and fully temperature compensated gauges will provide the performance, durability and reliability you’ve come to expect from genuine Additel products. To provide support for intrinsically safe needs, the ADT685EX-DL comes ready to provide pressure measurements and recordings in the most demanding of environments.

Each Additel 685 is also IP67 rated to protect your investment in dusty and/or wet environments


A Modern User Experience:

Additel has gone above and beyond to provide our customers with the best possible experience when using these new and revolutionary gauges. The 3.4 inch touchscreen display comes with a protective replaceable tempered glass screen and is a refreshing update to the traditional push button or blister pad interface. With an easy to navigate menu structure and fast touchscreen response, you will find these ADT685 gauges simple yet powerful to use. The easy to read display isn’t just fun to use, but it’s built rugged to handle the demands of a busy technician in the field or the laboratory.


Every model measures Gauge or Absolute Pressure:

The Additel 685 Digital Pressure Gauges contain a built-in barometer sensor which allows for the pressure reading to display in gauge pressure or absolute pressure with a simple menu selection. The built-in barometer is calibrated and certified to an accuracy of 50 Pa. With this unique feature, the ADT685 can be a solution for three common applications: gauge pressure measurement, absolute pressure measurement, and barometric or atmosphere pressure measurement. Having an Additel as your gauge will always give you the ability to do more with one instrument!

The Additel ADT685 pressure gauges, provide an accurate, reliable and economical solution for a wide range of pressure applications. With absolute pressure ranges to 35,000 kPa, there are options to meet all budgets and service requirements.


Datalogging Option:

We’ve added the option to do stand-alone data logging with the ADT685. Now you can record more than 10 million records internal to the 685 series. Each record includes date, time, pressure and temperature readings. Download the logged data with our free Additel/Land software or you can purchase our Additel/Log II for real-time logging and data analysis. Additel’s 685 digital pressure gauges are unmatched in performance and reliability. You get nothing but the best when you buy Additel Products!

The ADT685 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 ADT685EX-DL has options for measuring gauge, compound, differential, absolute and barometric pressure. Each ADT685EX-DL gauge comes with USB and BT comms as standard with optional RS232, RS485 and 4-20 mA outputs available.


Go to Non Hazardous Versions

Go to Non Hazardous Datalogging Versions

Go to IECEx Intrinsically Safe Non Logging Versions


  • Absolute pressure ranges up to 35,000 kPa
  • 0.05% or 0.1% FS accuracy
  • IECEx Intrinsically safe Ex ia IIC T4 Ga
  • Logs 10 million records
  • Optional real time logging
  • Fully temperature compensated accuracy
  • Touchscreen Display
  • Every model measures Gauge or Absolute Pressure
  • Built-in Barometer
  • Intuitive Smartphone Like Interface
  • Bluetooth and USB communication

  • Communicates with Additel’s Link Mobile App
  • Non datalogging version (See ADT685 and ADT685EX)
  • IP67 Rated
  • Non hazardous version (See ADT685 and ADT685-DL)
  • ISO 17025 accredited calibration w/data included
  • Optional NATA Accredited Calibration by Zedflo