Technical Data
Product highlights
The 721 can be configured by
selecting either a 16 PSI
(1.1 bar) or 36 psi (2.48 bar) low
pressure sensor then add any of
7 high pressure ranges includ-
ing 100, 300, 500, 1000, 1500,
3000 or 5000 psi (6.9, 20, 24.5,
69, 103.4, 200, 345 bar).
• Ideal for gas flow calibration
(custody transfer) applications
• Two isolated, stainless steel,
pressure sensors with
0.025
% accuracy
• Pt100 RTD input for tempera-
ture measurement, (probe
optional)
• Measures 4 to 20 mA signals
• Internal 24 V loop power
supply can power a transmit-
ter under test
• Measure up to 30 V dc, check
24 V loop power supplies
• Extend pressure measure-
ment range with connection
to external 700 series pres-
sure modules (29 ranges)
• Large backlit graphic display
can display up to three inputs
simultaneously
• Store five instrument setups
for recall and use
Fluke 721 Precision
Pressure Calibrator
Pressure calibration and temperature
measurement for custody transfer applications
The Fluke 721 Precision Pressure Calibrator with dual
isolated pressure sensors is the ideal tool for gas custody
transfer applications allowing you to take simultaneous static
and differential pressure measurements with a single tool.
2 Fluke Corporation Fluke 721 Precision Pressure Calibrator
Low pressure sensor High pressure sensor
Model Description Range sensor 1 Resolution
sensor 1
Accuracy
sensor 1
Range sensor 2 Resolution
sensor 2
Accuracy
sensor 2
Fluke-721-1601 Dual Sensor Pressure Cali-
brator, 16 PSIG, 100 PSIG
-14 psi to +16 psi
-0.97 bar to 1.1 bar
0.001 psi,
0.0001 bar
0.025
% of
full scale
-12 ps i to +100 psi
-0.83 bar to 6.9 bar
0.01 psi
0.0001 bar
0.025
% of
full scale
Fluke-721-1603 Dual Sensor Pressure Cali-
brator, 16 PSIG, 300 PSIG
-12 ps i to +300 psi
-0.83 bar to 20 bar
0.01 psi
0.001 bar
Fluke-721-1605 Dual Sensor Pressure Cali-
brator, 16 PSIG, 500 PSIG
-12 psi to +500 psi
-0.83 bar to 34.5 bar
0.01 psi
0.001 bar
Fluke-721-1610 Dual Sensor Pressure Cali-
brator, 16 PSIG, 1000 PSIG
0 psi to +1000 psi
0.00 bar to 69 bar
0.1 psi
0.001 bar
Fluke-721-1615 Dual Sensor Pressure Cali-
brator, 16 PSIG, 1500 PSIG
0 psi to +1500 psi
0.00 bar to 103.4 bar
0.1 psi
0.001 bar
Fluke-721-1630 Dual Sensor Pressure Cali-
brator, 16 PSIG, 3000 PSIG
0 psi to +3000 psi
0.00 bar to 200 bar
0.1 psi
0.01 bar
Fluke-721-1650 Dual Sensor Pressure Cali-
brator, 16 PSIG, 5000 PSIG
0 psi to +5000 psi
0.00 bar to 345 bar
0.1 psi
0.01 bar
0.035
% of
full scale
Fluke-721-3601 Dual Sensor Pressure Cali-
brator, 36 PSIG, 100 PSIG
-14 psi to +36 psi
-0.97 bar to 2.48 bar
-12 to +100 psi
-0.83 bar to 6.9 bar
.01 psi
0.0001 bar
0.025
% of
full scale
Fluke-721-3603 Dual Sensor Pressure Cali-
brator, 36 PSIG, 300 PSIG
-12 ps i to +300 psi
-0.83 bar to 20 bar
0.01 psi
0.001 bar
Fluke-721-3605 Dual Sensor Pressure Cali-
brator, 36 PSIG, 500 PSIG
-12 psi to +500 psi
-0.83 bar to 34.5 bar
0.01 psi
0.001 bar
Fluke-721-3610 Dual Sensor Pressure Cali-
brator, 36 PSIG, 1000 PSIG
0 psi to +1000 psi
0.00 bar to 69 bar
0.1 psi
0.001 bar
Fluke-721-3615 Dual Sensor Pressure Cali-
brator, 36 PSIG, 1500 PSIG
0 psi to +1500 psi
0.00 bar to 103.4 bar
0.1 psi
0.01 bar
Fluke-721-3630 Dual Sensor Pressure Cali-
brator, 36 PSIG, 3000 PSIG
0 psi to +3000 psi
0.00 bar to 200 bar
0.1 psi
0.01 bar
Fluke-721-3650 Dual Sensor Pressure Cali-
brator, 36 PSIG, 5000 PSIG
0 psi to +5000 psi
0.00 bar to 345 bar
0.1 psi
0.01 bar
0.035
% of
full scale
Temperature effect
No effect on accuracy on all functions from 15 °C to 35 °C
Add ± 0.002
% F.S./°C for temps outside of 15 °C to 35 °C
General specifications
Instrument setup recall Last used on power-up
Environmental Operating temperature -10 °C
to +50 °C
Storage temperature (without
batteries) -20 °C to +60 °C
Altitude 2,000 meters
Ingress protection IP-40
Power requirements 6.0 v dc
Battery life >35 hours, typical usage
Batteries required (4) Standard AA cells
Dimentions (HxWxD) 7.9” X 4.3” X 2.3” (20 cm X
11 cm X 5.8 cm)
Weight 03539 kg (1 lb 3 oz)
Connectors/ports pressure Two, 1/8 in NPT, 700P Series
Pressure Module; RTD Probe
Specifications 1-year
Electrical and temperature measurement 1-year
Function Range Resolution Accuracy
mA measure 0 to 24 mA 0.001 mA ±0.015% of rdg
±0.002mA
VDC measure 0 to 30 VDC 0.001V ±0.015% of rdg
±0.002V
*Temperature
measure (RTD/
Ohms)
-40 °C to 150 °C
(-40 °F to 302 °F)
0.01 °C, 0.01 °F ±0.015% of rdg
±0.02 ohms;
±0.1°C (±0.2°F)
±0.25 degC (±0.45
degF) combined
uncertainty when
using 720 RTD
probe accessory
Loop power supply 24V N/A 24 mA @ 24V
*Temperature measurement requires optional Fluke-720RTD Pt-100 RTD probe
available as an accessory
3 Fluke Corporation Fluke 721 Precision Pressure Calibrator
Fluke Corporation
PO Box 9090, Everett, WA 98206 U.S.A.
Fluke Europe B.V.
PO Box 1186, 5602 BD
Eindhoven, The Netherlands
For more information call:
In the U.S.A. (800) 443-5853 or
Fax (425) 446-5116
In Europe/M-East/Africa +31 (0) 40 2675 200 or
Fax +31 (0) 40 2675 222
In Canada (800)-36-FLUKE or
Fax (905) 890-6866
From other countries +1 (425) 446-5500 or
Fax +1 (425) 446-5116
Web access: http://www.fluke.com
©2013 Fluke Corporation.
Specifications subject to change without notice.
Printed in U.S.A. 6/2013 6000077A_EN
Pub_ID: 12085-eng
Modification of this document is not permitted
without written permission from Fluke Corporation.
Fluke. The Most Trusted Tools
in the World.
Ordering information
Fluke-721-1601 Dual Sensor Pressure Calibrator
16 PSIG, 100 PSIG
Fluke-721-1603 Dual Sensor Pressure Calibrator
16 PSIG, 300 PSIG
Fluke-721-1605 Dual Sensor Pressure Calibrator
16 PSIG, 500 PSIG
Fluke-721-1610 Dual Sensor Pressure Calibrator
16 PSIG, 1000 PSIG
Fluke-721-1615 Dual Sensor Pressure Calibrator
16 PSIG, 1500 PSIG
Fluke-721-1630 Dual Sensor Pressure Calibrator
16 PSIG, 3000 PSIG
Fluke-721-1650 Dual Sensor Pressure Calibrator
16 PSIG, 5000 PSIG
Fluke-721-3601 Dual Sensor Pressure Calibrator
36 PSIG, 100 PSIG
Fluke-721-3603 Dual Sensor Pressure Calibrator
36 PSIG, 300 PSIG
Fluke-721-3605 Dual Sensor Pressure Calibrator
36 PSIG, 500 PSIG
Fluke-721-3610 Dual Sensor Pressure Calibrator
36 PSIG, 1000 PSIG
Fluke-721-3615 Dual Sensor Pressure Calibrator
36 PSIG, 1500 PSIG
Fluke-721-3630 Dual Sensor Pressure Calibrator
36 PSIG, 3000 PSIG
Fluke-721-3650 Dual Sensor Pressure Calibrator
36 PSIG, 5000 PSIG
Fluke-720RTD RTD Probe for 721 and 719Pro
Fluke-720URTDA Universal RTD adapter for
Fluke-721 and 719Pro
Included:
•Soft case
•Four (4) AA batteries
•Manual
•Traceable calibration certificate
•Test leads
Available pressure engineering units
psi, bar, mbar, kPa, kgcm2,
cmH2O@4°C, cmH2O@20°C,
mH2O@4°C, mH2O@20°C,
inH2O@4°C, inH2O@20°C,
inH2O@60°F, mmHg@0°C,
inHg@0°C, ftH2O@4°C,
ftH2O@20°C, ftH2O@60°F
