Kobold DVZ Specifications

01/11- 2015

DVZ

Compact Vortex Flowmeter

for Low Viscosity Liquids

measuring

•

monitoring

•

analyzing

● Measuring Ranges:

0.13...1.2 GPM to 2.7...26 GPM

● Accuracy: ± 2.5 % of Full Scale

● Vortex Shedding Technology with No Moving

Parts

● PPS Body with Nickel Plated Brass or 316 SS
Fittings

● Outputs: Analog, Frequency, Switching,
Electronics with Digital Displays, Batching and
Totalizing Electronics

● Economically Priced

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

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

Compact Vortex Flowmeter Model DVZ

Description

The KOBOLD DVZ series vortex flowmeters are the perfect
solution for applications where reliability and low cost are
desired. The DVZ senses the flow rate of low viscosity liquids
using the vortex shedding principle. A small obstruction called
a bluff body is placed in the flow path. As liquid flows across
the bluff body, small low-pressure areas called vortices are
created just behind the bluff body. The position of the vortices
alternate to either side of the bluff body in a uniform pattern.
The frequency of the vorticy shift is directly proportional to flow
rate. This shift in the vortices is detected by a very sensitive
pressure sensor and processed as a flow rate signal.

The vortex flowmeter has no moving parts and is very reliable.
The DVZ series is available with a PPS body and a choice
of either nickel-plated brass or 316 stainless steel fittings.
The bluff body is available in either PPS or ceramic, which
has excellent long term wear characteristics. The available
outputs are frequency, 4-20 mA, adjustable relay, and
compact electronics with digital flowrate display, 4-20 mA
output and adjustable transistor switch options. The DVZ
series is rounded off by an optionally available batching or
totalizing electronic.

Areas of Application

Maximum Media Viscosity*

Measuring

Range

Code

..04.. / ..U1.. 0.5 1.5 3.0 - - 2 cSt

..07.. / ..U2.. 0.8 1.5 3.0 - - 2 cSt

..10.. / ..U3.. 1.3 1.3 3.5 - - 2 cSt

..16.. / ..U4.. 2.0 2.0 3.5 - - 4 cSt

..22.. / ..U5.. 3.2 3.2 3.2 6.0 - 4 cSt

..32.. / ..U6.. 4.0 4.0 4.0 3.2 12.5 7 cSt

..40.. / ..U7.. 4.0 4.0 4.0 8.0 15.0 7 cSt

..50.. / ..U8.. 5.0 5.0 5.0 9.0 16.5 7 cSt

..63.. / ..U9.. 6.3 6.3 6.3 10.0 18.5 7 cSt

..80.. / ..UA.. 8.0 8.0 8.0 11.0 20.5 7 cSt

..99.. / ..UB.. 10.0 10.0 10.0 11.5 23.0 7 cSt

*When using viscous media, the decreased Reynold's number

Measuring Range Start Point

1 cSt 1.5 cSt 2 cSt 4 cSt 7 cSt

Max.

Viscosity

causes a displacement of the measuring range start point to higher
values. The measuring range end point values stay unchanged.

• Monitoring the Flow of Low Viscosity Liquids

• Measuring Aggressive, High-purity, or Salty Solutions

• Not Suitable for Abrasive Media or Media Containing a
Large Amount of Fibers

Specifications

Available Ranges:

0.13...1.2 to 2.7...26

GPM Water

Accuracy: ± 2.5% of Full Scale
Repeatability: ± 1% of Full Scale
Straight Pipe Requirement: 10x Diameter Upstream

and 2x Downstream
Oper. Temp. Range: 32...176°F

2

Maximum Pressure

DVZ-1.. & DVZ-2..: 145 PSIG Fixed Fittings
DVZ-1.. & DVZ-2..: 290 PSIG Rotatable Fittings
DVZ-3.. & DVZ-4..: 290 PSIG
Max. Pressure Drop: 3.6 PSI at 100% Rated Flow

Wetted Parts

Sensor Housing:
Sensing Diaphragm: PVDF

Bluff Body: PPS or Ceramic
Seals: NBR, EPDM, or FKM

Fittings: Nickel-plated Brass or
316 Stainless Steel

www.koboldusa.com

PPS

No responsibility taken for errors;

subject to change without prior notice.

Electrical Specifications

Compact Vortex Flowmeter Model DVZ

DVZ-..S300, S30D
Power Supply: 24 VDC ± 20%
Switching Output
DVZ-..S300: Relay SPDT, Max.1A, 30 V
DVZ-..S30D: PNP 24 VDC, N/C, N/O

DC

Electrical Connection: Micro-DC, 4-pin or 5-pin Male
Electrical Protection: IP 65

DVZ-..F300, F390
Power Supply: 24 VDC ± 20%
Output: PNP Open Collector,

200 mA Max.

Frequency at F.S.
DVZ-..F300: 500 Hz
DVZ-..F390: 50…1000 Hz (User Specified)
Electrical Connection: Micro-DC, 4-pin Male
Electrical Protection: IP 65

DVZ-..L343, L443
Power Supply: 24 VDC ± 20%
Output: 4-20 mA, 3-wire
Max. Load: 500 Ω
Electrical Connection
L343: Micro-DC, 4-pin Male
L443: DIN 43650 Plug
Electrical Protection: IP 65

DVZ-..C34P, C34N

Power Supply:

24 VDC ± 20%

Output
C34N:

4-20mA, 3-wire/NPN Open Collector

C30P: 4-20mA, 3-wire/PNP Open Collector

Switch Rating: 300 mA Max.
Programming: Switch Setpoint, Reset Point,

Switching Logic, 4-20 mA Span and
Zero, Dampening and Lockout Code
via 2 Button Keypad

Electronic Connection: Micro-DC, 5-pin, Male
Electronic Protection: IP 65

DVZ-..E14R, E34R

Display: LCD, 2 x 8 Digits, Illuminated
Total, Part and Flow Quantities,
Unit Selectable
Totalizer Display: 8-Digit
Analog Output: 4-20 mA Adjustable

Load: Max. 500 Ω
Switching Output: Relay (2x), Max. 30 V, 2 A
Settings: Via 4 Buttons
Functions: Reset, MIN/MAX Memory,

Flow Monitor, Monitoring for Part
and Total Quantity, & Language
Power Supply: 24 VDC ±20 %, 3-wire

Power Consumption: Approx. 150 mA
Electrical Connection
E14R: 1 meter Integrated Cable
E34R: Micro-DC, 8-pin & 5-pin, Male

DVZ-..L443 with Optional AUF-3000
Power Supply: 24 VDC ± 20%
Output: 4-20 mA, 3-wire
Max. Load: 250 Ω with AUF-3000
Electrical Connection: DIN 43650 Plug
Electrical Protection: IP 65

DVZ-..C30R, C30M
Power Supply: 24 VDC ± 20%
Output
C30M: NPN Open Collector Switch (2x)
C30R: PNP Open Collector Switch (2x)
Switch Ratings: 300 mA Max.
Programming: Switch Setpoint, Reset Point,

Switching Logic, Dampening, Lock
Out Code - via 2-button Keypad

Power Consumption: Approx. 100 mA
Electronic Connection: Micro-DC, 5-pin, Male
Electronic Protection: IP 65

No responsibility taken for errors;
subject to change without prior notice.

www.koboldusa.com

DVZ-..G14R, G34R

Display: LCD, 2 x 8 Digits, Illuminated,
Batching, Total, and Flow Quantity,
Unit Selectable
Totalizer Display: 8-Digit
Batcher: 5-Digit
Analog Output: 4-20 mA Adjustable
0-10 VDC (Upon Request)
Load: Max. 500 Ω
Switching Output: Relay (2x), Max. 30 V, 2 A

Settings: Via 4 Buttons
Functions: Batching (Relay S2), Start, Stop,

Reset, Fine Batching, Correction
Amount, Flow Switch, Total
Quantity, & Language
Power Supply: 24 VDC ±20 %, 3-wire
Power Consumption: Approx. 150 mA
Electrical Connection
G14R: 1 meter Integrated Cable
G34R: Micro-DC, 8-pin & 5-pin, Male

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