Kobold VKM Specifications

Viscosity-Compensated Flow

Meters and Switches

for Viscous Liquids

measuring

•

monitoring

•

analyzing

VKM

● ± 4% Full Scale Accuracy

● Viscosity Compensation up

to ∆v=540 cSt

● Density Compensation up to

∆p=30 lb/ft3

● Universal Mounting

● Direct Reading Scales for Oil

● Max. Pressure 3600 PSI Brass

5000 PSI Stainless Steel

● Housing Materials in Brass

or Stainless Steel

● 4...20 mA Output and/or

Digital Display Options

KOBOLD companies worldwide:

ARGENTINA, AUSTRALIA, AUSTRIA, BELGIUM, BULGARIA, CANADA, CHILE, CHINA, COLOMBIA,
CZECH REPUBLIC, EGYPT, FRANCE, GERMANY, HUNGARY, INDIA, INDONESIA, ITALY, MALAYSIA,
MEXICO, NETHERLANDS, PERU, POLAND, REPUBLIC OF KOREA, ROMANIA, SINGAPORE, SPAIN,
SWITZERLAND, TAIWAN, THAILAND, TUNISIA, TURKEY, UNITED KINGDOM, USA, VIETNAM

01/03-11-2019

KOBOLD Instruments, Inc.
1801 Parkway View Drive
Pittsburgh, PA 15205

Main Ofce:

1.800.998.1020

1.412.788.4890
[e-mail]
www.koboldusa.com

Viscosity Compensated Flowmeter and Switch Model VKM

Description

KOBOLD VKM flowmeters and switches are unique offerings for high
viscosity media. Using KOBOLD’s patented viscosity compensation
system, the VKM is insensitive to viscosity and density changes
during operation. This patented and exceptional technology offers
an extremely versatile instrument ready for almost any application
imaginable.

Specifications

Accuracy: ± 4% full scale (viscosity of 105 cSt)
Viscosity Range: 1...540 cSt
Viscosity-Compensated: Up to Δv=540 cSt with same
scale, ± 5% additional variation
Density-Compensated: Up to Δp=30 lb/ft3 with same
scale, ± 5% additional variation
Flow Media: e.g. clean mineral oil, water and
other compatible liquids
Mounting: Universal, without recalibration
Measuring Principle: Float with orifice, spring-loaded
Max. Temperature: 212 °F (176 °F for VKM-0xxx & VKM-
6xxx w/C34P)
Max. Pressure: 3600 PSIG for Brass units
5000 PSIG for SS units
Housing: Nickel-plated Brass or SS 304
Fittings: Nickel-plated Brass or SS 304
Float: Brass or SS 304
Orifice: SS 301
Spring: SS 301
Seals: NBR (Brass units), FKM (SS units)
Electr. Switch Housing: Plastic

Magnetic Pointer
Indicator: Nickel-plated Brass,
Polycarbonate
Ingress Protection: IP54 for Side Indicator
IP65 for Electrical Contact
Contacts: Max. 230 VDC/0.26A/60W,
60 VDC/1A/60W,
Max. 240 VAC/0.42A/100W,
100 VAC/1A/100W

Compact Electronic Option C34P**
Power Requirement: 24 VDC ±20%
Display: 3 digit LED
Output: 4-20 mA, 3-wire, RLoop < 500 ohms
Switch: PNP, 300 mA Max.
Electrical Connection: M-12 Micro-DC plug, 4-Pin
Hysteresis: Approx. 3.5 mm Float Movement
Protection: IP65

**Note: Max flow range indicated is reduced by 10% for all
ranges when using model VKM-0xxx series or the optional ..C34P
electronic.

Order Details (Example: VKM-7112 U with order note; flow direction horizontal, left to right)

Range

Oil**

(GPM)

0.03...0.12 1/4" 11.6 VKM-0102 VKM-0202 VKM-5102 VKM-5202 VKM-6102 VKM-6202 VKM-7102 VKM-7202 -

0.05...0.3 1/4" 16.0 VKM-0103 VKM-0203 VKM-5103 VKM-5203 VKM-6103 VKM-6203 VKM-7103 VKM-7203 1/2"

0.15...0.5 1/4" 17.4 VKM-0104 VKM-0204 VKM-5104 VKM-5204 VKM-6104 VKM-6204 VKM-7104 VKM-7204 1/2"

0.2...0.9 1/4" 13.1 VKM-0105 VKM-0205 VKM-5105 VKM-5205 VKM-6105 VKM-6205 VKM-7105 VKM-7205 1/2"

0.5...2.5 1/4" 11.6 VKM-0106 VKM-0206 VKM-5106 VKM-5206 VKM-6106 VKM-6206 VKM-7106 VKM-7206 1/2"

1.0...3.5 1/2" 16.0 VKM-0107 VKM-0207 VKM-5107 VKM-5207 VKM-6107 VKM-6207 VKM-7107 VKM-7207 3/4"

1.5...5.0 1/2" 16.0 VKM-0108 VKM-0208 VKM-5108 VKM-5208 VKM-6108 VKM-6208 VKM-7108 VKM-7208 3/4"

1.0...11 3/4" 5.8 VKM-0109 VKM-0209 VKM-5109 VKM-5209 VKM-6109 VKM-6209 VKM-7109 VKM-7209 1"

1.0...14 3/4" 16.0 VKM-0110 VKM-0210 VKM-5110 VKM-5210 VKM-6110 VKM-6210 VKM-7110 VKM-7210 1"

2.0...18 3/4" 16.0 VKM-0111 VKM-0211 VKM-5111 VKM-5211 VKM-6111 VKM-6211 VKM-7111 VKM-7211 1"

2.0...20 1" 16.0 VKM-0112 VKM-0212 VKM-5112 VKM-5212 VKM-6112 VKM-6212 VKM-7112 VKM-7212 -

Accessory: P/N 807.007 = mating 5-Pin Micro-DC Plug w/ 6 Ft. Cable for Option C34P

Stand.

Conn.

(NPT)

Press.

Drop
Max.

(PSI)

4-20 mA Transmitter

Oil Scale**

Brass SS Brass SS Brass SS Brass SS

Flow Switch

1 N/O Contact, Oil

Scale

Flowmeter

Oil Scale

*Max flow range indicated is reduced by 10% for all ranges when using model VKM-0xxx series or the optional ..C34P electronic
**Option "R" is not available with option "V".

Note: Remember to always state your flow direction on your order

2

www.koboldusa.com

Flowmeter and Scale

1 N/O Contact, Oil

Scale

subject to change without prior notice.

Options

Opt.Conn.

(NPT)

Suffix "B"

No responsibility taken for errors;

Special

Contact

..C34P* =
Compact

Electronic
Display,for
VKM-6xxx
Series Only

..R** = Additional

Contact

..U = SPDT

Contact

..V = Special

Inlet Fitting
for BVB
Manifold
Mount