Variable Area Flowmeter and Switches

Flow Ranges0.044...0.44 GPM to 26.4...264 GPM (Water) / 0.17...1.7 SCFM to 100...1000 SCFM (Air)
AccuracyPer DIN Class - 2.0
Max. Pressure Rating 580 PSIG Standard (Higher on request)
Operating Temperature-40...300 °F / -40...390 °F (Optional)
Fittings½"...3" ANSI Flanges, 1/4"...2" NPT
Flow Ranges 0.002...0.02 GPM to 60...550 GPM (Water) / 0.008...0.08 SCFM to 140...1400 SCFM (Air)
Fittings ½"...6" ANSI/DIN Flanges, ½"...2" FNPT
AccuracyPer DIN Class - 1.6 to 2.2 (Depending on model)
Max. Pressure Rating580 PSIG Standard, Up to 8700 PSIG upon request
Operating Temperature Range-40...392 °F / -40...662 °F (Optional)
Max. Flow Capacity 6.5 GPM per Complete Valve Block
Fitting 1/2" NPT
Body Material Aluminum
Max. Pressure235 PSIG
Max. Temperature 240 °F
Max. Flowmeter Quantity6 Units
Measuring Range0.1...1.0 GPM to 1...13 GPM (Water)
Accuracy± 5% Full Scale
Fittings ¼"...1" NPT, Brass or 304 SS
Max. Temperature 212 °F
Maximum Pressure 145 PSIG
Flow Ranges0.01...0.1 GPH to 265...2645 GPH (Water) / 0.025...0.25 SCFH to 670...6700 SCFH (Air)
Accuracy ± 1.0% FS
Fittings½", 1", 1½", 2"
Max. Pressure145 PSIG (½"...1"), 131 PSIG (1½"), 102 PSIG (2")
Max. Temperature212 °F
Measuring Range 0.06...0.66 to 26...264 GPM (Water) / 0.5...3 SCFM to 50...400 SCFM (Air)
Fittings 1"...2½" Glue Socket or FNPT
Body Material Polyamide, Polysulfone
Max. Pressure145 PSIG
Max. Temperature140 °F (w/PVC Connections)
Accuracy ± 4% of Full Scale
ContactOptional Reed Switch
Switching Range0.075...0.25 to 1...14 GPM (Water)
Fittings¼"...¾" NPT
Body MaterialBrass, SS
Max. Pressure3600 PSIG (Brass) / 5000 PSIG (SS)
Max. Temperature240 °F (Brass/SS Float) / 160 °F (PP, PVDF Float)
Accuracy± 5% FS
Switching Range0.04...0.6 to 4...40 GPM (Water) / 0.2...1 to 5...130 SCFM (Air @ STP)
Fittings 1/4"...1-1/4" NPT
Body Material Brass, SS
Max. Pressure 3600 PSIG (Brass) / 5000 PSIG (SS)
Max. Temperature 160 °F (PP Float) / 212 °F (Brass/SS Float)
Accuracy± 5% F.S.
Switching Range0.4...13 GPM (Water)
Switch PointApprox. 0.25...1 GPM Falling
Fitting 1" FNPT
Body Material Ni-plated Brass or St. Steel
Max. Pressure3600 PSIG (Brass) / 5000 PSIG (SS)
Max. Temperature212 °F
SwitchN/O or SPDT Reed Contact
Measuring/Switching Range
Water0.075...0.35 to 2.5...40 GPM
Air0.25...1.25 to 10...150 SCFM
Fittings ¼"...1¼" NPT
Material Ni-plated Brass, SS
Max. Pressure145 PSIG
Max. Temperature160°F / 212 °F
Accuracy± 5% FS
OptionN/O or SPDT Reed Contact
Measuring Range1…10 to 15000…50000 l/h (Water), 0.02…0.2 to 50…500 Nm³/h (Air)
Accuracy±2.5...4 % of Full Scale
Maximum Pressure 20 Bar
Maximum Temperature100° C
Process ConnectionDN15 ... 80, ½"... 3" ANSI Flange
Wetted MaterialCast Iron, Stainless Steel 1.4301, 1.4404
Output Optional Switch Contacts
Measuring Range0.25...2.5 to 250...2500 l/h (Water), 3.2...32 Nl/h to 50...500 Nm³/h (Air)
Accuracy±2.5 ... 4 % of Full Scale
Maximum Pressure20 Bar
Maximum Temperature100°C
Process ConnectionG ¼ ... 3, Hose Connection
Wetted MaterialStainless Steel 1.4301, 1.4404
Output Optional Switch Contacts
Measuring Range 10…100 to 200…2000 L/h (Water)
Accuracy±2.5 ... 4 % of Full Scale
Maximum Pressure10 Bar
Maximum Temperature100°C
Process ConnectionG 3/8, G ½, 3/8" NPT, ½" NPT Female Thread
Wetted MaterialPOM-C, Stainless Steel 1.4301, 1.4404
Output Optional Switch Contacts
Measuring Ranges2...6.3 GPH to 8...26 GPM (Oil)
Fittings1/2" or 3/4" NPT
MaterialNi-Plated Brass
Viscosity Range 30-540 cSt
Temperature Range-13...212 °F
Max. Pressure 3600 PSIG
Accuracy± 4% FS (Add ± 4% for Viscosity Changes)
Measuring/Switching Range 0.03...0.12 to 2...21 GPM (Oil)
Fittings¼" NPT...1" NPT
Wetted Material Ni-Plated Brass, SS, Glass, NBR, FKM
Max. Pressure 175 PSIG
Max. Temperature 212 °F
Accuracy ± 5% FS
Options 1 or 2 Reed Contacts, External Pointer Indicator
Measuring/Switching Range0.03...0.12 to 2...20 GPM
Fittings¼"...1" NPT
Material Ni-Plated Brass, SS
Max. Pressure3600 PSIG (Brass) / 5000 PSIG (SS)
Max. Media Temperature 212 °F (176 °F for VKM-0xxx & VKM-6xxx w/C34P)
Accuracy ± 5% FS
OptionsReed Contact, Analog Output, Compact Electronics
Switching Range0.5...5 GPM to 5...26 GPM (Water) / 0.5 ...4.5 GPM to 3...20 GPM (Oil)
Fittings 1" NPT Standard, ½" NPT and ¾" NPT Union Fittings (Optional)
Body MaterialPolysulfone
Max. Pressure230 PSIG
Max. Temperature250 °F
Accuracy± 5 % FS
OptionsReed Contact, Union Fittings
Other Members of the KOBOLD Group:Henschen, Unirota, Heinrichs, MesUra Henschen GmbH KOBOLD Unirota Kft. Heinrichs KOBOLD Group MesUra KOBOLD Messring GmbH
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