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 # 20230423
OVERVIEW
Gauge pressure Differential pressure
With advanced microprocessor technology and state-of-the-art silicon pressure sensors, the 681 series digital
pressure gauges provide an accurate, reliable, and economic solution for a wide range of pressure applications.
They are loaded with functionality and remarkably easy to use. To reach the best performance, every silicon
pressure sensor in our gauges is specially aged, tested and screened before assembly. At Additel, fully temperature
compensated accuracy means every sensor is pressure tested at several environmental temperatures from -10°C to
50°C. With this test data individual coefcients are generated and stored in the gauge characterizing its performance
over the full temperature compensated range. And now the ADT681IS comes with an IP67 rating meaning it is dust
resistant and water proof, submersible in 1 meter of water.
Designed to fit your need
Additel pressure gauges give you the widest variety of sensor choices on the market. Whether you require low
inches of water measurement or very high pressure measurement, we have a gauge that will meet your need.
We offer sensors which are ±1 inH
2
O (±2.5 mbar) to 60K psi (4,200 bar) and everything in between.
Do your applications require you to measure both positive and vacuum pressure? Our compound gauges do not
compromise accuracy and provide you with the same high accuracy specification on both positive and vacuum
pressures. We offer a wide variety up to 300 psi (20 bar). If you need a higher range, just contact us and we can
likely customize one to meet your need. We also offer absolute pressure sensors to 5K psi (350 bar) and a full range
of differential pressure sensors from ±1 inH
2
O (±2.5 mbar) to ±300 inH
2
O (±700 mbar).
Are you looking for a pressure gauge to use in hazardous areas? Our certied (ATEX, CSA US & IECEx) intrinsically
safe models (681IS) are designed for pressure measurement in hazardous areas.
If you need to panel mount our sensors, we offer the option (see ordering information) for a back-mounted pressure
port and gauge housing designed to t in a panel. And most recently, we've added the option to do stand-alone data
logging with the 681. Now you can record more than 21,000 records internal to the 681 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. The 681 series digital pressure gauges are
unmatched in performance and reliability. Best of all, they are very affordable.
Pressure ranges to 60,000 psi (4,200 bar)
Now offering 0.05% accuracy up to 40K psi
0.02%, 0.05%, 0.1%, 0.2% FS or 0.1%RD accuracy
% pressure indication with fan-shaped graph scale for
visual reference
Fully temperature compensated accuracy
Panel mount gauges are available
Intrinsically safe version (681IS)
Data logging option
IP67 rated (681IS)
Digital Pressure Gauges
Additel 681
FEATURES
Pressure ranges to 60,000 psi (4,200 bar)
0.02% full span accuracy (681-02)
0.05% full span accuracy (681-05)
0.1% full span accuracy (681-10)
0.2% full span accuracy (681-20)
0.1% reading span accuracy (681-RD)
IP67 rated: Submersible in 1 meter of water(681IS)
Fully temperature compensated accuracy from
14°F to 122°F (-10°C to 50°C)
Up to eleven selectable pressure units
Large, easy to read display with 5-digit resolution
Backlit display
% pressure indication with fan-shaped graph scale for
visual reference
Display ash warning when pressure over 120% of FS
Bottom mount or panel mount
ATEX certied intrinsically safe (Model 681IS)
ISO 17025-accredited calibration w/data included
9V battery power or AC adapter (optional)
Data logging to 21,843 records (includes date, time,
pressure and temperature)
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 # 20230423
Model ADT681 ADT681IS
Description
Digital Pressure Gauge Intrinsically Safe Digital Pressure Gauge
Intrinsic Safety
&
European Compliance
CE marked
CE marked
ATEX certied intrinsically safe
II 1G EX ia IIC T4 Ga
TUR 16.0023X
Accuracy
(For detailed accuracy, please
see pressure range table)
681(IS)-02 : 0.02% of full span
681(IS)-05 : 0.05% of full span
681(IS)-10 : 0.1% of full span
681(IS)-20 : 0.2% of full span
681(IS)-RD: 0% to 20% of Range: 0.02% of full span 20% to 110% of Range: 0.1% of reading
Vacuum: 0.25% of full span
[1][2]
Gauge Types
Gauge pressure, compound pressure, absolute pressure, differential pressure and 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.
Display
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: 16.5 mm (0.65")
Pressure Units
Pa, kPa, MPa, psi, bar, mbar, kgf/cm
2
, inH
2
O@4°C mmH
2
O@4°C, inHg@0°C, mmHg@0°C
Environmental
Compensated Temperature: 14°F to 122°F (-10°C to 50°C)
Operating Temperature: 14°F to 122°F (-10°C to 50°C)
Storage Temperature: -4°F to 158°F (-20°C to 70°C)
Humidity: <95%
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: 0.236 inch (Ø6 mm) test hose
Other connections available per request
Power
Battery: One 9 V 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: 120, 90, 60, 45, 30, 15, 10, 5 and 1 minute auto-off options
External power: 110/220 V external power adapter (optional)
Enclosure
Case material: Aluminum alloy
Wetted parts: 316L SS
Dimension: Ø110 mm X 35 mm depth X 176 mm height (panel mount gauge: Ø140 mm X 86 mm depth)
Weight: 0.6 kg
Compliance
Protection Level: IP67(available for 681IS GP15-60K)
Vibration: 5 g (20-2000 Hz)
Shock Resistance: 100 g/11 ms
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
Communication
RS232 *(Do not use the RS-232 connector in a hazardous atmosphere)
Warranty
1 year
[1] FS = -14.5 psi
[2] Applicable to ADT681-RD-CPX
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 # 20230423
Gauge Pressure
[1]
P/N
Pressure Range
Media
[2]
Accuracy
Burst
Pressure
(psi) (bar) %FS %RD
V15 -15 -1.0 G 0.02 (0.05, 0.1, 0.2) N/A 3×
GP2 2 0.16 G 0.05 (0.1, 0.2) N/A 3×
GP5 5 0.35 G 0.05 (0.1, 0.2) 0.1 3×
GP10 10 0.7 G, L
[3]
0.02 (0.05, 0.1, 0.2) 0.1 3×
GP15 15 1.0 G, L
[3]
0.02 (0.05, 0.1, 0.2) 0.1 3×
GP30 30 2.0 G, L
[3]
0.02 (0.05, 0.1, 0.2) 0.1 3×
GP50 50 3.5 G, L 0.02 (0.05, 0.1, 0.2) 0.1 3×
GP100 100 7.0 G, L 0.02 (0.05, 0.1, 0.2) 0.1 3×
GP150 150 10 G, L 0.02 (0.05, 0.1, 0.2) 0.1 3×
GP300 300 20 G, L 0.02 (0.05, 0.1, 0.2) 0.1 3×
GP500 500 35 G, L 0.02 (0.05, 0.1, 0.2) 0.1 3×
GP600 600 40 G, L 0.02 (0.05, 0.1, 0.2) 0.1 3×
GP1K 1,000 70 G, L 0.02 (0.05, 0.1, 0.2) 0.1 3×
GP1.5K 1,500 100 G, L 0.02 (0.05, 0.1, 0.2) 0.1 3×
GP2K 2,000 140 G, L 0.02 (0.05, 0.1, 0.2) 0.1 3×
GP3K 3,000 200 G, L 0.02 (0.05, 0.1, 0.2) 0.1 3×
GP5K 5,000 350 G, L 0.02 (0.05, 0.1, 0.2) 0.1 3×
GP10K 10,000 700 G, L 0.02 (0.05, 0.1, 0.2) 0.1 3×
GP15K 15,000 1,000 G, L 0.05 (0.1,0.2) 0.1 2×
GP20K 20,000 1,400 G, L 0.05 (0.1,0.2) N/A 1.5×
GP25K 25,000 1,600 G, L 0.05 (0.1,0.2) N/A 1.5×
GP30K 30,000 2,000 G, L 0.05 (0.1,0.2) N/A 1.5×
GP36K 36,000 2,500 G, L 0.05 (0.1,0.2) N/A 1.5×
GP40K 40,000 2,800 G, L 0.05 (0.1,0.2) 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×
[1] Sealed gauge pressure for above 1,000 psi
[2] G=Gas, L=Liquid
[3] 0.02% FS for gas media only
PRESSURE RANGE
Barometric Pressure
P/N
Pressure Range
Media Accuracy
Burst
Pressure
Low High
BP 60 kPa 110 kPa G 55 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 # 20230423
Absolute Pressure
P/N
Pressure Range
Media
[1]
Accuracy(%FS)
Burst
Pressure
(psi) (bar)
AP5 5 0.35 G 0.1 (0.2) 3×
AP10 10 0.7 G 0.1 (0.2) 3×
AP15 15 1.0 G 0.1 (0.2) 3×
AP30 30 2.0 G 0.1 (0.2) 3×
AP50 50 3.5 G 0.1 (0.2) 3×
AP100 100 7.0 G, L 0.05 (0.1, 0.2) 3×
AP300 300 20 G, L 0.05 (0.1, 0.2) 3×
AP500 500 35 G, L 0.05 (0.1, 0.2) 3×
AP1K 1,000 70 G, L 0.05 (0.1, 0.2) 3×
AP3K 3,000 200 G, L 0.05 (0.1, 0.2) 3×
AP5K 5,000 350 G, L 0.05 (0.1, 0.2) 3×
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 ±160 G 0.05 3× ±10 psi
DP100 ±100 ±250 G 0.02 3× ±15 psi
DP150 ±150 ±350 G 0.02 (0.05) 3× 50 psi
DP300 ±300 ±700 G 0.02 (0.05) 3× 50 psi
Compound Pressure
P/N
Pressure Range
M e d i a
[1]
Accuracy
Burst
Pressure
(psi) (bar) %FS
[2]
%RD
CP2 ±2 ±0.16 G 0.05 (0.1,0.2) N/A 3×
CP5 ±5 ±0.35 G 0.02 (0.05,0.1,0.2) 0.1 3×
CP10 ±10 ±0.7 G 0.02 (0.05,0.1,0.2) 0.1 3×
CP15 ±15 ±1 G 0.02 (0.05,0.1,0.2) 0.1 3×
CP30 -15 to 30 -1 to 2 G 0.02 (0.05,0.1,0.2) 0.1 3×
CP100 -15 to 100 -1 to 7 G, L 0.02 (0.05,0.1,0.2) 0.1 3×
CP300 -15 to 300 -1 to 20 G, L 0.02 (0.05,0.1,0.2) 0.1 3×
CP500 -15 to 500 -1 to 30 G, L 0.02 (0.05,0.1,0.2) N/A 3×
CP600 -15 to 600 -1 to 40 G, L 0.02 (0.05,0.1,0.2) N/A 3×
CP1K -15 to 1K -1 to 70 G, L 0.02 (0.05,0.1,0.2) N/A 3×
[1] G=Gas, L=Liquid
[2] FS specication applies to the span of the range.
Note: For oil-free applications contact Additel.
Optional Accessories
ORDERING INFORMATION
Model Number
Model:
ADT681
ADT681IS
Accuracy:
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-M20X1.5 male
AF-Autoclave F-250-C female
AM-Autoclave M-250-C male
DL: Data logging
Pressure range P/N:
See pressure range table
PB: Panel mount with back pressure port
ADT681 GP300 PSI PB DL02 N
[1] FS specication 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.
[1] G=Gas, L=Liquid
Model number Description
9812
110V/220V external power adapter (DC 9 V) for 681 digital
pressure gauge.
9502
Additel/Log II real time data logging and
graphical software for 681 and 672.
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
9900-681 Carrying Case for one 681 digital pressure gauge
9902 Carrying case for 4 gauges
9251 Rubber boot for ADT681
9200-681
Certied O
2
Cleaning for ADT681 gauges (some limitations
apply)
Accessories Included
Rubber boot (Except panel mount)
9 V alkaline battery (1 pc)
ISO 17025 accredited calibration certicate
