Pressure / Process Calibration Equipment
01
Corporate Headquarters
2900 Saturn St #B
Brea, CA 92821, USA
Salt Lake City Office
1364 West State Rd. Suite 101
Pleasant Grove, UT 84062, USA
Phone: 714-998-6899 Email: sales@additel.com
Rev # 20250403
OVERVIEW
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. This completely new way of interfacing with our gauges makes the ADT685
gauges a real pleasure to use. 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 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.
Pressure ranges up to 60,000 psi (4,200 bar)
0.01%, 0.02%, 0.05%FS or 0.1%RD accuracy
Fully temperature compensated accuracy
Every model measures Gauge or Absolute Pressure
Built-in Barometer
Touchscreen display
Intrinsically safe version 685Ex (optional)
Bluetooth and USB communications
Data logging (optional)
IP67 rated
Communicates with Additel's Link Mobile App
ISO 17025-accredited calibration w/data included
Digital Pressure Gauges
Additel 685
Datalogging Option:
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 gauge. 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 nd 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 eld or the laboratory.
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 certied to an accuracy
of 55 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!
We've added the option to do stand-alone data logging with the ADT685. Now you can record more than 10M
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!
Every model measures Gauge or Absolute Pressure:
Additel 685
02
Corporate Headquarters
2900 Saturn St #B
Brea, CA 92821, USA
Salt Lake City Office
1364 West State Rd. Suite 101
Pleasant Grove, UT 84062, USA
Phone: 714-998-6899 Email: sales@additel.com
Pressure / Process Calibration Equipment
Rev # 20250403
Model ADT685 ADT685Ex
Intrinsic Safety
&
European Compliance
CE, UKCA
CE marked, CSA marked
ATEX certied intrinsically safe
II 1G EX ia IIC T4 Ga
Accuracy
(For detailed accuracy, please
see pressure range table)
685(Ex)-01: 0.01% of full span; 02: 0.02% of full span; 05: 0.05% of full span
685(Ex)-RD: 0% to 20% of range: 0.02% of full span
20% to 110% of range: 0.1% of reading
Built-in barometer:
55 Pa
Gauge Types
Gauge pressure, compound pressure, absolute pressure, differential pressure and
barometric pressure
Display
Touch screen (3.4'' FSTN segment capacitive) - 5 1/2 full digits
Screen protector: tempered glass lm (replaceable)
Display rate: 3 readings per second (default setting).
Adjustable from 10 readings per second to 1 reading every 20 seconds
Pressure Units
[3]
Pa, kPa, MPa, psi, bar, mbar, kgf/cm2, inH2O@4°C, mmH2O@4°C, inHg@4°C,
mmHg@4°C and 3 customizable units
Environmental
Compensated Temp.: 14°F to 122°F (-10°C to 50°C)
Operating Temp.: 14°F to 122°F (-10°C to 50°C)
Storage Temp: -4°F to 158°F (-30°C to 70°C)
Humidity: 0 - 95%, Non-condensing
Pressure Port
＜
15,000 psi: 1/4NPT male, 1/2NPT male, 1/4BSP male, 1/2BSP male, M20 × 1.5 male
≥15,000 psi: 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: barb tting
Other connections available per request
Power
Battery: three AA alkaline batteries (included)
Battery life: 1500 hours typical
Power auto-off: user selectable
External power: 110/220 V adapter (5 VDC) (optional, excl ADT685Ex)
Enclosure
Case material: 304 SS
Wetted parts: 316 SS
[1]
size: 4.65" × 1.77" × 7.01" (118mm × 42mm × 178mm)
Weight: 1.50 (0.68 kg)
Compliance
Protection Level: IP67
Vibration: 5 g (10-500 Hz)
Shock Resistance: 8 g/11 ms
Data Logging
(Available on data
logging option
ADT685-...-DL)
Data storage: 10,000,000 records
Rate: user-selectable from 0.1 to 9999.9 second intervals
Communication
USB Type-C and Bluetooth included
RS-232 or RS-485
[2]
(optional)
4 - 20 mA Output
[4]
3.2 μA
Warranty
1 year
[1] Wetted parts material types may vary by pressure range. Please refer to manual or contact Additel for more information
[2] 4-20mA output and RS-485 not available in ADT685Ex models
[3] Available units are dependent on the overall pressure range
SPECIFICATIONS
Pressure / Process Calibration Equipment
03
Corporate Headquarters
2900 Saturn St #B
Brea, CA 92821, USA
Salt Lake City Office
1364 West State Rd. Suite 101
Pleasant Grove, UT 84062, USA
Phone: 714-998-6899 Email: sales@additel.com
Rev # 20250403
PRESSURE RANGE
[1] Sealed gauge pressure for above 1,000 psi
[2] G=Gas, L=Liquid
[3] 0.01%FS, 0.02% FS for gas media only
Gauge Pressure
[1]
P/N
Pressure Range
Media
[2]
Accuracy
Burst
Pressure
(psi) (bar) %FS %RD
V15 -15 -1.0 G, L
[3
0.01, 0.02, 0.05 N/A 3×
GP2 2 0.16 G 0.01, 0.02, 0.05 N/A 3×
GP5 5 0.35 G, L
[3]
0.01, 0.02, 0.05 0.1 3×
GP10 10 0.7 G, L
[3]
0.01, 0.02, 0.05 0.1 3×
GP15 15 1.0 G, L
[3]
0.01, 0.02, 0.05 0.1 3×
GP30 30 2.0 G, L 0.01, 0.02, 0.05 0.1 3×
GP50 50 3.5 G, L 0.01, 0.02, 0.05 0.1 3×
GP100 100 7.0 G, L 0.01, 0.02, 0.05 0.1 3×
GP150 150 10 G, L 0.01, 0.02, 0.05 0.1 3×
GP300 300 20 G, L 0.01, 0.02, 0.05 0.1 3×
GP500 500 35 G, L 0.01, 0.02, 0.05 0.1 3×
GP600 600 40 G, L 0.01, 0.02, 0.05 0.1 3×
GP1K 1,000 70 G, L 0.01, 0.02, 0.05 0.1 3×
GP1.5K 1,500 100 G, L 0.01, 0.02, 0.05 0.1 3×
GP2K 2,000 140 G, L 0.01, 0.02, 0.05 0.1 3×
GP3K 3,000 200 G, L 0.01, 0.02, 0.05 0.1 3×
GP5K 5,000 350 G, L 0.01, 0.02, 0.05 0.1 3×
GP10K 10,000 700 G, L 0.01, 0.02, 0.05 0.1 1.5×
GP15K 15,000 1,000 G, L 0.01, 0.02, 0.05 0.1 1.5×
GP20K 20,000 1,400 G, L 0.05 (0.1) N/A 1.3×
GP25K 25,000 1,600 G, L 0.05 (0.1) N/A 1.2×
GP30K 30,000 2,000 G, L 0.05 (0.1) N/A 1.5×
GP36K 36,000 2,500 G, L 0.05 (0.1) N/A 1.5×
GP40K 40,000 2,800 G, L 0.05 (0.1) N/A 1.35×
GP50K 50,000 3,500 G, L 0.1 (0.2) N/A 1.2×
GP60K 60,000 4,200 G, L 0.1 (0.2) N/A 1.1×
Barometric Pressure
P/N
Pressure Range
Media Accuracy
Burst
Pressure
Low High
BP 60 kPa 110 kPa G 55 Pa
3×
BPH 60 kPa 110 kPa G 22 Pa 3×
04
Corporate Headquarters
2900 Saturn St #B
Brea, CA 92821, USA
Salt Lake City Office
1364 West State Rd. Suite 101
Pleasant Grove, UT 84062, USA
Phone: 714-998-6899 Email: sales@additel.com
Pressure / Process Calibration Equipment
Rev # 20250403
Differential Pressure
P/N
Pressure Range
Media
Accuracy
(%FS)
[1]
Burst
Pressure
Static
Pressure
Range
(inH
2
O) (mbar)
DP1 ±1 ±2.5 G 0.05
[2]
100× ±10 psi
DP2 ±2 ±5.0 G 0.05
[2]
100× ±10 psi
DP5 ±5 ±10 G 0.05
[2]
50× ±10 psi
DP10 ±10 ±25 G 0.05
[2]
20× ±10 psi
DP20 ±20 ±50 G 0.05 20× ±10 psi
DP30 ±30 ±75 G 0.05 20× ±10 psi
DP50 ±50 ±125 G 0.05 3× ±10 psi
DP100 ±100 ±250 G 0.02 3× ±15 psi
DP150 ±150 ±350 G 0.02 3× 50 psi
DP300 ±300 ±700 G 0.02 3× 50 psi
[1] FS specication applies to the span of the range. Accuracy includes one year stability.
[2] 0.05%FS accuracy (incl 6 months stability). One year accuracy is 0.05%FS calibration accuracy combined with 0.05%FS one year
stability.
PRESSURE RANGE
Compound Pressure
P/N
Pressure Range
Media
[1]
Accuracy
Burst
Pressure
(psi) (bar) %FS
[3]
%RD
[4]
CP2 ±2 ±0.16 G, L
[2
0.01
,
0.02, 0.05 N/A 3×
CP5 ±5 ±0.35 G, L
[2]
0.01
,
0.02, 0.05 0.1 3×
CP10 ±10 ±0.7 G, L
[2]
0.01, 0.02, 0.05 0.1 3×
CP15 ±15 ±1.0 G, L
[2]
0.01, 0.02, 0.05 0.1 3×
CP30 -15~30 -1~2.0 G, L 0.01, 0.02, 0.05 0.1 3×
CP50 -15~50 -1~3.5 G, L 0.01, 0.02, 0.05 0.1 3×
CP100 -15~100 -1~7.0 G, L 0.01, 0.02, 0.05 0.1 3×
CP150 -15~150 -1~10 G, L 0.01, 0.02, 0.05 0.1 3×
CP300 -15~300 -1~20 G, L 0.01, 0.02, 0.05 0.1 3×
CP500 -15~500 -1~35 G, L 0.01, 0.02, 0.05 N/A 3×
CP600 -15~600 -1~40 G, L 0.01, 0.02, 0.05 N/A 3×
CP1K -15~1000 -1~70 G, L 0.01, 0.02, 0.05 N/A 3×
[1] G=Gas, L=Liquid
[2] 0.01%FS, 0.02%FS for gas media only
[3] FS = upper limit of range - lower limit of range
[4] %RD accuracy: 0% to 20% of range: ± (0.02% of full span)
20% to 110% of range: ± (0.1% of reading)
vacuum: ± (0.25% of FS), FS=-14.5psi
Pressure / Process Calibration Equipment
05
Corporate Headquarters
2900 Saturn St #B
Brea, CA 92821, USA
Salt Lake City Office
1364 West State Rd. Suite 101
Pleasant Grove, UT 84062, USA
Phone: 714-998-6899 Email: sales@additel.com
Rev # 20250403
Note: For oil-free applications contact Additel.
Optional Accessories
Model number Description
9903 Carrying Case for one digital pressure gauge
9040 Hanging strap with magnet
9810 110V/220V external power adapter (DC 5V)
9502
Additel/Log II real time data logging and
graphical software for ADT 685 and ADT 685Ex
9530-BASIC
Additel/Acal Automated calibration software with asset
management, basic version
9530-NET
Additel/Acal Automated calibration software with asset
management, network version, Includes server installation
and 1 user license
9050 USB to RS232 (DB9/M) Adapter
9050-EXT RS 232 (DB9/M) extension cable, 9 feet
9260 Screen protector kit
9257 Field rain cover
Accessories Included
Rubber boot
AA alkaline battery (3 pcs)
USB cable (type-C) (1 pc)
RS-485 Adapter (for RS-485 models only)
4-20mA cable (for 20MA models only)
Silicone tube - 1 meter each (2 pcs for DP models only)
ISO 17025 Accredited Calibration Certicate
ADT685
Digital Pressure Gauges
ORDERING INFORMATION
Model Number
Model:
ADT685
ADT685Ex
Accuracy:
01-0.01% of full span
02-0.02% of full span
05-0.05% of full span
10-0.1% of full span
20-0.2% of full span
RD-0.1% of reading
Range type:
PSI-range by psi
BAR-range by bar
H
2
O-range by inH
2
O
Pressure port type:
N- 1/4NPT male
N2- 1/2NPT male
B-1/4BSP male
B2-1/2BSP male
M-M20 X 1.5 male
AF-Autoclave F-250-C female
AM-Autoclave M-250-C male
Pressure range P/N:
See pressure range table
ADT685 GP300 PSI01 N
DL 232
DL: Data logging
Comm port (optional):
232 = RS - 232
485 = RS - 485 (excl ADT685Ex)
20MA = 4-20 mA (excl ADT685Ex)
Communication Types Supported
Comm ADT685 ADT685Ex ADT686 ADT673
RS232
• • • •
RS485
•
WiFi
• •
USB
• • • •
Bluetooth(BLE)
• • • •
•
Included
•
Optional
Model
Additel Software Compatibility Matrix
ADT685/ADT685Ex ADT686/ADT673
ACal LogII Land Link ACal LogII Land Link
RS232
• • • • • •
RS485
only for
ADT685
◐
[2]
◐
[2]
◐
[2]
WiFi
• • • •
[1]
USB
• • • • • •
Bluetooth(BLE)
• •
Model
Comm
[1] This conguration requires that the device be connected to ACloud via Wi-Fi to utilize the
Additel Link app.
[2] 4-20mA output and RS-485 not avaiable in ADT685Ex models.
Supported
◐
Non Ex models only