ADT685 Digital Pressure Gauge – Barometric Pressure Datalogging

April 13, 2021




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.


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


Go to Non Datalogging Versions

Go to IECEx Intrinsically Safe Versions

Go to IECEx Intrinsically Safe Datalogging Versions


Product Selector

Select options below, click on REQUEST QUOTE to add to inquiries/quotes list and submit. A quotation will be sent to you once your request is reviewed.



  • Pressure measuring range of 60 to 110 kPa
  • Accuracy of 40 Pa across the measuring range
  • 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 (See ADT685 and ADT685EX)
  • IP67 Rated
  • Intrinsically safe version (See 685EX and ADT685EX-DL)
  • ISO 17025-accredited calibration w/data included
  • Optional NATA accredited calibration by Zedflo


ADT685 Product Data Sheet