Keeping your world up and running.®

Fluke 721 Precision Pressure Calibrator

Fluke 721 Precision Pressure Calibrator with dual isolated sensors for gas custody transfer applications

Get a Free Demo
Fluke 721 Precision Pressure Calibrator
  • Fluke 721 Precision Pressure Calibrator
  • Fluke 721 Dual Range Precision Pressure Calibrator
  • Fluke 721 Precision Pressure Calibrator with Transmitter
Overview
Features
Reviews
Specs
Models/Accessories
Resources
  • Pressure calibration and temperature measurement for custody transfer applications

    The ideal tool for gas custody transfer applications is the Fluke 721 Precision Pressure Calibrator. With dual isolated pressure sensors, it allows you to take simultaneous static and differential pressure measurements with a single tool.

  • 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 including 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 temperature measurement, (probe optional)
    • Measures 4 to 20 mA signals
    • Internal 24 V loop power supply can power a transmitter under test
    • Measure up to 30 V DC, check 24 V loop power supplies
    • Extend pressure measurement range with connection to external 700 series pressure modules (29 ranges)
    • Large backlit graphic display can display up to three inputs simultaneously
    • Store five instrument setups for recall and use
  • Specifications 1-Year
    Fluke-721-1601 Low pressure sensor
    Range Resolution Accuracy
    -14 psi to +16 psi,
    -0.97 bar to 1.1 bar
    0.001 psi,
    0.0001 bar
    0.025% of full scale
    High pressure sensor
    -12 psi to +100 psi,
    -0.83 bar to 6.9 bar
    0.01 psi,
    0.0001 bar
    0.025% of full scale
    Fluke-721-1603 Low pressure sensor
    -14 psi to +16 psi,
    -0.97 bar to 1.1 bar
    0.001 psi,
    0.0001 bar
    0.025% of full scale
    High pressure sensor
    -12 psi to +300 psi,
    -0.83 bar to 20 bar
    0.01 psi,
    0.001 bar
    0.025% of full scale
    Fluke-721-1605 Low pressure sensor
    -14 psi to +16 psi,
    -0.97 bar to 1.1 bar
    0.001 psi,
    0.0001 bar
    0.025% of full scale
    High pressure sensor
    -12 psi to +500 psi,
    -0.83 bar to 34.5 bar
    0.01 psi,
    0.001 bar
    0.025% of full scale
    Fluke-721-1610 Low pressure sensor
    0 psi to +1000 psi,
    0.00 bar to 69 bar
    0.1 psi,
    0.001 bar
    0.025% of full scale
    High pressure sensor
    -12 psi to +500 psi,
    -0.83 bar to 34.5 bar
    0.01 psi,
    0.001 bar
    0.025% of full scale
    Fluke-721-1615 Low pressure sensor
    Range Resolution Accuracy
    -14 psi to +16 psi,
    -0.97 bar to 1.1 bar
    0.001 psi,
    0.0001 bar
    0.025% of full scale
    High pressure sensor
    0 psi to +1500 psi,
    0.00 bar to 103.4 bar
    0.1 psi,
    0.001 bar
    0.025% of full scale
    Fluke-721-1630 Low pressure sensor
    -14 psi to +16 psi,
    -0.97 bar to 1.1 bar
    0.001 psi,
    0.0001 bar
    0.025% of full scale
    High pressure sensor
    0 psi to +3000 psi,
    0.00 bar to 200 bar
    0.1 psi,
    0.01 bar
    0.025% of full scale
    Fluke-721-1650 Low pressure sensor
    -14 psi to +16 psi,
    -0.97 bar to 1.1 bar
    0.001 psi,
    0.0001 bar
    0.025% of full scale
    High pressure sensor
    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 Low pressure sensor
    Range Resolution Accuracy
    -14 psi to +36 psi,
    -0.97 bar to 2.48 bar
    0.001 psi,
    0.0001 bar
    0.025% of full scale
    High pressure sensor
    -12 to +100 psi,
    -0.83 bar to 6.9 bar
    .01 psi,
    0.0001 bar
    0.025% of full scale
    Fluke-721-3603 Low pressure sensor
    -14 psi to +36 psi,
    -0.97 bar to 2.48 bar
    0.001 psi,
    0.0001 bar
    0.025% of full scale
    High pressure sensor
    -12 psi to +300 psi,
    -0.83 bar to 20 bar
    0.01 psi,
    0.001 bar
    0.025% of full scale
    Fluke-721-3605 Low pressure sensor
    -14 psi to +36 psi,
    -0.97 bar to 2.48 bar
    0.001 psi,
    0.0001 bar
    0.025% of full scale
    High pressure sensor
    -12 psi to +500 psi,
    -0.83 bar to 34.5 bar
    0.01 psi,
    0.001 bar
    0.025% of full scale
    Fluke-721-3610 Low pressure sensor
    Range Resolution Accuracy
    -14 psi to +36 psi,
    -0.97 bar to 2.48 bar
    0.001 psi,
    0.0001 bar
    0.025% of full scale
    High pressure sensor
    0 psi to +1000 psi,
    0.00 bar to 69 bar
    0.1 psi,
    0.001 bar
    0.025% of full scale
    Fluke-721-3615 Low pressure sensor
    -14 psi to +36 psi,
    -0.97 bar to 2.48 bar
    0.001 psi,
    0.0001 bar
    0.025% of full scale
    High pressure sensor
    0 psi to +1500 psi,
    0.00 bar to 103.4 bar
    0.1 psi,
    0.01 bar
    0.025% of full scale
    Fluke-721-3630 Low pressure sensor
    -14 psi to +36 psi,
    -0.97 bar to 2.48 bar
    0.001 psi,
    0.0001 bar
    0.025% of full scale
    High pressure sensor
    0 psi to +3000 psi,
    0.00 bar to 200 bar
    0.1 psi,
    0.01 bar
    0.025% of full scale
    Fluke-721-3630 Low pressure sensor
    -14 psi to +36 psi,
    -0.97 bar to 2.48 bar
    0.001 psi,
    0.0001 bar
    0.025% of full scale
    High pressure sensor
    0 psi to +5000 psi,
    0.00 bar to 345 bar
    0.1 psi,
    0.01 bar
    0.035% of full scale
    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 m
    Ingress protection IP-40
    Power requirements 6.0 V DC
    Battery life >35 hours, typical usage
    Batteries required (4) Standard AA cells
    Dimensions (H x W x D) 7.9 x 4.3 x 2.3 in (20 x 11 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
    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
    V DC measure 0 to 30 V DC 0.001 V ±0.015% of rdg
    ±0.002 V
    Temperature measure (RTD/ Ohms)1 -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°C (±0.45°F) combined uncertainty when using 720 RTD probe accessory
    Loop power supply 24 V N/A 24 mA @ 24 V
    1. Temperature measurement requires optional Fluke-720RTD Pt-100 RTD probe available as an accessory
    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
    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
    • Models
      Model Name Description  
      Fluke 721-1601 Fluke 721-1601 Precision Pressure Calibrator
      16 psig, 100 psig, dual sensor pressure calibrator
       

      Includes:

      • Soft case
      • Four (4) AA batteries
      • Manual
      • Traceable calibration certificate
      • Test leads
      Fluke 721-1603 Fluke 721-1603 Precision Pressure Calibrator
      16 psig, 300 psig, dual sensor pressure calibrator
       

      Includes:

      • Soft case
      • Four (4) AA batteries
      • Manual
      • Traceable calibration certificate
      • Test leads
      Fluke 721-1605 Fluke 721-1605 Precision Pressure Calibrator
      16 psig, 500 psig, dual sensor pressure calibrator
       

      Includes:

      • Soft case
      • Four (4) AA batteries
      • Manual
      • Traceable calibration certificate
      • Test leads
      Fluke 721-1610 Fluke 721-1610 Precision Pressure Calibrator
      16 psig, 1000 psig, dual sensor pressure calibrator
       

      Includes:

      • Soft case
      • Four (4) AA batteries
      • Manual
      • Traceable calibration certificate
      • Test leads
      Fluke 721-1615 Fluke 721-1615 Precision Pressure Calibrator
      16 psig, 1500 psig, dual sensor pressure calibrator
       

      Includes:

      • Soft case
      • Four (4) AA batteries
      • Manual
      • Traceable calibration certificate
      • Test leads
      Fluke 721-1630 Fluke 721-1630 Precision Pressure Calibrator
      16 psig, 3000 psig, dual sensor pressure calibrator
       

      Includes:

      • Soft case
      • Four (4) AA batteries
      • Manual
      • Traceable calibration certificate
      • Test leads
      Fluke 721-1650 Fluke 721-1650 Precision Pressure Calibrator
      16 psig, 5000 psig, dual sensor pressure calibrator
       

      Includes:

      • Soft case
      • Four (4) AA batteries
      • Manual
      • Traceable calibration certificate
      • Test leads
      Fluke 721-3601 Fluke 721-3601 Precision Pressure Calibrator
      36 psig, 100 psig, dual sensor pressure calibrator
       

      Includes:

      • Soft case
      • Four (4) AA batteries
      • Manual
      • Traceable calibration certificate
      • Test leads
      Fluke 721-3603 Fluke 721-3603 Precision Pressure Calibrator
      36 psig, 300 psig, dual sensor pressure calibrator
       

      Includes:

      • Soft case
      • Four (4) AA batteries
      • Manual
      • Traceable calibration certificate
      • Test leads
      Fluke 721-3605 Fluke 721-3605 Precision Pressure Calibrator
      36 psig, 500 psig, dual sensor pressure calibrator
       

      Includes:

      • Soft case
      • Four (4) AA batteries
      • Manual
      • Traceable calibration certificate
      • Test leads
      Fluke 721-3610 Fluke 721-3610 Precision Pressure Calibrator
      36 psig, 1000 psig, dual sensor pressure calibrator
       

      Includes:

      • Soft case
      • Four (4) AA batteries
      • Manual
      • Traceable calibration certificate
      • Test leads
      Fluke 721-3615 Fluke 721-3615 Precision Pressure Calibrator
      36 psig, 1500 psig, dual sensor pressure calibrator
       

      Includes:

      • Soft case
      • Four (4) AA batteries
      • Manual
      • Traceable calibration certificate
      • Test leads
      Fluke 721-3630 Fluke 721-3630 Precision Pressure Calibrator
      36 psig, 3000 psig, dual sensor pressure calibrator
       

      Includes:

      • Soft case
      • Four (4) AA batteries
      • Manual
      • Traceable calibration certificate
      • Test leads
      Fluke 721-3650 Fluke 721-3650 Precision Pressure Calibrator
      36 psig, 5000 psig, dual sensor pressure calibrator
       

      Includes:

      • Soft case
      • Four (4) AA batteries
      • Manual
      • Traceable calibration certificate
      • Test leads
    • Batteries, Chargers & Adapters
      Model Name Description  
      Fluke 720URTDA Fluke 720URTDA Universal RTD Adapter for Fluke 721 and 719Pro
    • Compatible Products
      Model Name Description  
      Fluke 750P Fluke 750P Series Pressure Modules
    • Test Probes
      Model Name Description  
      Fluke 720RTD Fluke 720RTD RTD Probe for 721 and 719Pro
    • Related Products
      Model Name Description  
      Fluke 750P Fluke 750P Series Pressure Modules
      Fluke 754 Fluke 754 Documenting Process Calibrator-HART
      Fluke 753 Fluke 753 Documenting Process Calibrator
      Fluke 726 Fluke 726 Precision Multifunction Process Calibrator
      Fluke 725 Fluke 725 Multifunction Process Calibrator
      Fluke 719Pro Fluke 719Pro Electric Pressure Calibrator
      Fluke 719 Fluke 719 Pressure Calibrator
      Fluke 718 Fluke 718 Pressure Calibrator
      Fluke 717 Fluke 717 Pressure Calibrator