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Customer Reviews

Fluke 721-1650 Dual Sensor Pressure Calibrator

Model: 721-1650

Precision Pressure Calibrator with dual isolated sensors for gas custody transfer applications. Ranges: 16 psi (low) 5,000 psi (high).

Add In-House Traceable Calibration to your 721-1650

6 to 7 Weeks

$2,639.99 USD

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Fluke 721-1650 Offers


  • Two isolated, stainless steel, pressure sensors with 0.025% f.s. accuracy
  • Can be configured by selecting either a 16 psig (1.1 bar) or 36 psig (2.48 bar) low pressure sensor and then adding your choice of 7 high pressure ranges
  • External pressure module connection supports all pressure modules (29 ranges) for even more measurement capability
  • Temperature-compensation ensures accuracy in field applications
  • Pt100 RTD input for temperature measurement, accurate to 0.1°C (0.2°F) (Requires optional RTD probe sold separately)
  • Measure 4-20 mA signals
  • Internal 24 V Loop Power Supply can power a transmitter under test
  • Measure up to 30 V DC
  • Large graphic style LCD with backlight can be configured to display up to 3 inputs simultaneously (i.e. pressure 1, pressure 2, and RTD or any combination of inputs)
  • Pressure displayed in the user's choice of 19 engineering units
  • Switch test on both pressure inputs, or external pressure module
  • Operating mode layers support simple measurements to complex applications
  • Up to five frequently used setups can be stored; last setup automatically recalled on power-up
  • % error and damping functions

Application Selection Guide

Fluke 754 Documenting Process Calibrator with HART communication Fluke 721 Dual Sensor Pressure Calibrators Fluke 719PRO Electric Pressure Calibrators Fluke 719 Pressure Calibrator Fluke 718 Series Pressure Calibrators Fluke 717 Series Pressure Calibrators Fluke 700G Series Pressure Test Gauge Fluke 3130-G2M Portable Pneumatic Pressure Calibrators Fluke 2700G Series Pressure Gauges Fluke Deadweight Testers
Model number 754 721/​721Ex 719Pro 719 718 717 700G 3130 2700G Dead-weight Testers
Calibrating pressure transmitters (field) Ideal
Calibrating pressure transmitters (bench) Ideal
Calibrating HART Smart transmitters Ideal
Documenting pressure transmitter calibrations Ideal
Testing pressure switches in the field Ideal
Testing pressure switches on the bench Ideal
Documenting pressure switch tests Ideal
Testing pressure switches with live (voltage) contacts Ideal
Gas custody transfer computer tests Ideal
Verifying process pressure gauges (field) Ideal
Verifying process pressure gauges (bench) Ideal
Logging pressure measurements Ideal
Testing pressure devices using a reference gauge Ideal
Hydrostatic vessel testing Ideal
Leak testing (pressure measurement logging) Ideal
Pressure Calibration Selection Guide

Fluke 721-1650 Specifications

Specifications 1-Year
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 +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 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
Electrical and Temperature Measurement 1-Year
Function Range Resolution Accuracy
mA measure 0 to 24 mA 0.001 mA ±0.015% of rdg
VDC measure 0 to 30 VDC 0.001V ±0.015% of rdg
*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
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

What's Included with the Fluke 721 Series

  • Dual Sensor Pressure Calibrator
  • Soft case
  • Four (4) AA batteries
  • Manual
  • Traceable calibration certificate
  • Test leads


Click on a category to view a selection of compatible accessories with the Fluke 721-1650 Dual Sensor Pressure Calibrator.

Fluke 720RTD Probe 720RTD
RTD probe for use with Fluke 721 and 719Pro.
$287.99 USD

was $319.99

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Customer Reviews for the Fluke 721-1650