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Fluke Calibration 5141 molbox RFM Gas Flow Calibrator Kits

  • Flow ranges cover from 1 sccm to 50 slm
  • ±0.5 % of reading total one-year accuracy
  • Measures mass and volume flow with user settable reference pressure and temperature conditions
  • Reference standard is upstream of the device under test, eliminating cross contamination and expensive damage to the flow elements
  • Integrated gas flow regulation and adjustment hardware
  • Expandable to over 5000 slm with additional molbloc flow elements and control hardware
  • Includes traceable calibration for operation in N2 and Air, with corrections for other gases
  • Gas supply and test adapters included for 1/4 in tube, 1/4 in NPT and 1/4 in BSP
  • Includes advanced functions such as totalize, average, hi/lo, deviation, on-board purge, leak test and tare, available from the front control panel or by RS-232 and IEEE-488 remote interfaces
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Product Information
Datasheet 2.20 MB PDF
Manual 1.95 MB PDF
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Fluke Calibration revolutionized high end gas flow calibration with the introduction of molbox/ molbloc mass flow standards. Molbox/molbloc systems have replaced large, inflexible, error prone volumetric piston provers and bell provers with a compact, easy to use, versatile digital standard. Molbox/molbloc systems are the standard of choice for high end calibration labs and mass flow device manufacturers around the world. Improvements offered by molbox/molbloc include:
  • True mass flow calibration and traceability— no corrections from volumetric to mass
  • Real-time digital mass flow indication, loaded with features—easily automated
  • No moving parts—uninterrupted gas flow measurement, no fluctuations from piston stroke
  • Flexibility to be positioned upstream or downstream— can calibrate at many line pressures
  • Modular components allows future upgrade and expansion
  • Very wide range with small footprint—no flow straightening hardware required
Whether your requirement is manual calibration of a simple variable area flow meter (rotameter) or fully automated calibration of a mass flow controller (MFC), the Fluke Calibration 5141's molbox/molbloc systems offer the ideal solution. The Fluke Calibration 5141 molbox RFM Gas Flow Calibrator Kit with one or more molbloc flow elements can cover a wide range of flow calibration devices with total one-year measurement uncertainty of ± 0.5 % of reading. If your needs change, molbloc flow elements can be added, with models covering flows from 1 sccm to over 5000 slm (175 scfm). If better measurement uncertainty is needed, the same flow elements can be used with molbox1+ to achieve accuracy as good as ± 0.125 % of reading.

High end gas flow calibration made simple
The Fluke Calibration 5141 molbox RFM gas flow calibrator kits feature molbox RFM and molbloc-L configurations optimized to cover a very wide workload combined with molstic-L and other interconnect hardware needed for a complete calibration system. Simply supply 90 psi of pure N2 or air to the system. An included regulator delivers a stable regulated flow to the molbloc. Downstream of the molbloc, an included metering valve allows you to regulate the mass flow value required for the DUT. The Fluke Calibration 5141 supplies 90 psi gas upstream, tare the reading, and adjust the fine metering valve to deliver the desired mass flow rate with an accuracy of ±0.5 % of reading. Fluke Calibration gas flow calibrator kits eliminate complication, but don’t compromise molbox/molbloc best in class performance.

Measurement Specifications
Gas calibration included Nitrogen (N2), Air
Maximum working measurement line pressure 600 kPa (87 psi) absolute
Measurement range <1 sccm to 50 slm, depending on model. Flow ranges depend on test gas. Ranges indicated for N2 and Air.
General Specifications
Power requirements 85 V AC to 264 V AC, 47 Hz to 440 Hz, 18 VA max consumption
Normal operating temperature range 15°C to 30°C (59°F to 86°F)
Storage temperature range -20°C to 70°C (-4°F to 158°F)
Vibration Meets MIL-T-28800D
molbox RFM weight and dimensions 5.6 lb (2.55 kg) max
7.5 x 32 x 6 in (19 x 81.28 x 15.25 cm) Approx.
molstic with molbloc weight and dimensions (max) 20 lb(9kg)
7.5 x 32 x 6 in (19 x 81.28 x 15.25 cm) Approx.
Supply gas required 99.998 % pure N2 or Air regulated to 90 psig (600 kPa)
Note: A fine pressure regulator is included, but an additional regulator (not included) may be required to reduce pressure supplied to the 514X kit to approximately 90 psi
Gas calculations reported Nitrogen (N2), Air, Argon (Ar), Carbon Monoxide (CO), Helium (He), Oxygen (O2), Carbon Dioxide (CO2), Carbon Tetrafluoride (CF4), Ethane (C2H6), Ethylene (C2H4), Fluoroform (CHF3), Hexafluoroethane (C2F6), Hydrogen (H2), Methane (CH4), Nitrous Oxide (N2O), Propane (C3H8), Sulfur Hexafluoride (SF6)
Flow connections for gas supply and device under test 1/4 in tube with adapters included for 1/4 in NOT and 1/4 in BSP
Ordering Information
Model Description Buy Online Price
MFR ID: 4183801
Fluke Calibration 5141-100 Gas Flow Calibrator, 100 Sccm Discontinued
MFR ID: 4183812
Fluke Calibration 5141-1K Gas Flow Calibrator, 1 Slm Discontinued
MFR ID: 4183820
Fluke Calibration 5141-10K Gas Flow Calibrator, 10 Slm Discontinued
MFR ID: 4183835 
Fluke Calibration 5141-50K Gas Flow Calibrator, 50 Slm Discontinued
Included Accessories
  • 1 - molbox RFM reference flow monitor, including:
    • Quick connect molbloc pressure lines
    • Molbloc communication cable
    • Line cord
    • User manual
  • 1 -molbloc-L laminar flow element
  • 1 -molstic-L mounting system, including:
    • Fine pressure regulator
    • Isolation valve
    • Precise flow metering valve
  • 1 - Tubing and adaptors to connect gas supply and device under test, including:
    • 1/4 in tube fitting
    • 1/4 in NPT female
    • 1/4 in NPT male
    • 1/8 in NPT male
    • 1/4 in BSP male