Fluid path - equipment

KROHNE FLEXMAG 4050 C Flowmeter

Overview

KROHNE FLEXMAG 4050 C Flowmeter

Accurately measure your fluid flow rate with the KROHNE FLEXMAG 4050 C® electromagnetic flowmeter to safeguard your process.

Other flowmeters using ultrasonic technology are dependent on fluid properties such as pressure, temperature and viscosity. Due to the electromagnetic principle and the manufacturing precision of the flow tube, the FLEXMAG flowmeter provides highly accurate measurement with outstanding repeatability. It provides a completely stable, direct and accurate fluid flow measurement that will not drift over time.

The flowmeter features a disposable, biocompatible and gamma sterilisable flow tube that easily integrates into customised single-use assemblies. It is one of a wide range of product accessories and is compatible with:

  • puresu® single-use assemblies
  • PROFINET® and EtherNet/IP™ 530, 630 and 730 series Watson-Marlow process pumps

This flowmeter is available as a package with Watson-Marlow pumps and/or puresu assemblies.

Features and benefits

  • Electromagnetic flowmeters provide superior accuracy and repeatability
  • Verify accurate flow conditions of compatible Watson-Marlow pumps
  • Enable easy integration into customised puresu single-use assemblies to ensure product quality

Technical summary

Max. operating pressure58 psi
Min. flow rate0.015 L/min
Max. flow rate 75 L/min
Pulse output0 to 1000 Hz
Min. fluid conductivity requirement≥20 µs/cm
SterilityFlow tubes and bags are gamma sterilisable up to 50kGy and autoclavable up to 121°C for 30 min 
CertificationBSE/TSE free, FDA 21 CFR 177, USP Class VI 
Protection categoryIP54 

Performance

Flow tube ID and tube bore Transmitter Flowmeter flow range (l/min) Flow rate range and flow sensor measuring error Flow rate range and flow sensor measuring error Watson-Marlow cased pumps
ID 6.4 mm (1/4 in) Small 0.015 to 3 l/min 0.1 to 1 l/min up to 3.5% 1 to 3 l/min up to 1.35% 530
630
ID 9.6 mm (3/8 in) Medium 0.07 to 14 l/min 0.2 to 2 l/min 2 to 14 l/min 530
630
730
ID 12.7 mm (1/2 in) Medium 0.1 to 20 l/min 0.4 to 4 l/min 4 to 20 l/min 630
730
ID 19.0 mm (3/4 in) Large 0.3 to 62 l/min 0.9 to 8.5 l/min 8.5 to 62 l/min 730
ID 25.4 mm (1 in) Large 0.5 to 75 l/min 1.5 to 15 l/min 15 to 75 l/min 730

Specifications

Technical specifications

FLEXMAG 4050 C Flowmeter
Cable2m cable included. Transmitter end: M12 8-pin connector fitted. Control end: unfinished. 
CertificationBSE/TSE free, FDA 21 CFR 177, USP Class VI 
ConnectorM12 8-pin 
Min. fluid conductivity requirement≥20 µs/cm
Power supply24 VDC 
Protection categoryIP54 
SterilityFlow tubes and bags are gamma sterilisable up to 50kGy and autoclavable up to 121°C for 30 min 
Max. flow rate 75 L/min
Max. operating pressure4 bar
Max. operating pressure58 psi
Min. flow rate0.015 L/min
Pulse output0 to 1000 Hz
Weight0.39 - 0.46 kg
Weight0.86 - 1.01 lbs
Storage temperature range -40 to 60 °C
Storage temperature range -40 to 140 °F
Working temperature range 2 to 45 °C
Working temperature range 36 to 113 °F
Small: 0.40 kg (0.88 lbs), Medium: 0.39 kg (0.86 lbs), Large: 0.46 kg (1.01 lbs)
Dimensions transmitter
Nominal size L W H a b c d
Large 160 mm (6.30 in) 100 mm (3.94 in) 60 mm (2.36 in) 23 mm (0.91 in) 42 mm (1.65 in) 100 mm (3.94 in) 59 mm (2.32 in)
Medium 139 mm (5.47 in) 90 mm (3.54 in) 48 mm (1.89 in) 23 mm (0.91 in) 33 mm (1.30 in) 82 mm (3.23 in) 66 mm (2.60 in)
Small 144 mm (5.67 in) 90 mm (3.54 in) 48 mm (1.89 in) 28 mm (1.10 in) 33 mm (1.30 in) 94 mm (3.70 in) 66 mm (2.60 in)
All mounting holes diameter: 5.2 mm x 8.2 mm (0.20 in x 0.32 in). 2 additional mounting holes for Large Transmitter: c2 = 41 mm (1.61 in); d2 = 84 mm (3.31 in)

Dimensions flow tube
Nominal size L W H d1 d2 e
ID 1/4" 70 mm (2.76 in) 22 mm (0.87 in) 17 mm (0.67 in) 8.5 mm (0.33 in) 6.0 mm (0.24 in) 16.6 mm (0.65 in)
ID 3/8" 95 mm (3.74 in) 30 mm (1.18 in) 25 mm (0.98 in) 12.6 mm (0.50 in) 9.2 mm (0.36 in) 25.6 mm (1.01 in)
ID 1/2" 95 mm (3.74 in) 30 mm (1.18 in) 25 mm (0.98 in) 16.9 mm (0.67 in) 12.5 mm (0.49 in) 25.6 mm (1.01 in)
ID 3/4" 125 mm (4.92 in) 45 mm (1.77 in) 41 mm (1.61 in) 23.4 mm (0.92 in) 19.0 mm (0.75 in) 36.0 mm (1.42 in)
ID 1" 140 mm (5.51 in) 45 mm (1.77 in) 41 mm (1.61 in) 29.9 mm (1.18 in) 25.4 mm (1.00 in) 44.0 mm (1.73 in)

Materials of construction

Case materialABS (Acrylonitrile butadiene styrene), Polycarbonate
Wetted materialHastelloy C22, Polysulfone (UDEL 1700)

Validation

Validation pack for KROHNE FLEXMAG 4050 C

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Literature

Datasheet

  1. KROHNE FLEXMAG 4050 C datasheet (US).pdf
    PDF - 970.5kb

Other Resources

  1. KROHNE FLEXMAG 4050C REACH declaration (EN).pdf
    PDF - 106.8kb

Videos

KROHNE FLEXMAG 4050 C Flowmeter

Order Information

Product codes

FLEXMAG flowmeters are available for order in combination with 530, 630, 730 cased pumps and integrated into puresu assemblies. Additional functionality when used in combination with En/Pn cased pumps. These products are not offered stand-alone.

Related Products

  1. 530 process pumps

    530 process pumps

    Flow rates to 3.5 L/min (55 USGPH) and pressures up to 7 bar (100 psi). Precise 2,200:1 speed control range.

    Pumps - cased pumps

  2. 630 mid-flow process pumps

    630 mid-flow process pumps

    Flow rates to 18 L/min (4.76 USGPM) and pressures up to 4 bar (60 psi). Precise 2,650:1 speed control range.

    Pumps - cased pumps

  3. 730 process pumps

    730 process pumps

    Flow rates to 33 L/min (8.8 USGPM) and pressures up to 2 bar (30 psi). Precise 3,600:1 speed control range.

    Pumps - cased pumps

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