Kobold DOR Specifications

Insertion Paddle Wheel

Flow Meter / Monitor

for Low Viscosity Liquids

measuring

•

monitoring

•

analyzing

DOR

● Flow Range:

5.5 … 180 GPM to 25,000 … 800,000 GPM

● Flow Velocity Range: 1.0...33.0 ft/s

● p

: 1160 PSI

max

● t

: 300 °F

max

● Connection: 1½" NPT, 2" NPT Male, R 1½,
& R 2 Male for Pipe Sizes: 1½"...100"

● Linearity: ± 1.5% with Well Established
Flow Profile

● Body Material: Stainless Steel

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

01/08-07-2019

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

Insertion Paddle Wheel Flow Meter / Monitor Model DOR

Description

The DOR series insertion paddle wheel flow sensor offers cost effective
measurement of the flow of water or water-like liquids in large pipes.
The sensor is inserted into the process piping via a suitable tee,
thread-o-let or half coupling. Flow through the pipe results in rotation
of the paddle wheel which is proportional to the flow velocity and to
the flowrate in the pipe. The DOR is much less expensive than full
bore flowmeters, especially in larger pipe sizes. Insertion paddle wheel
sensors are rugged and boast exceptional tolerance to dirt and solids.

The DOR features an all 316 L stainless steel body. The rotor is made of
PVDF or PEEK, with a long-life graphite/PTFE self-lubricating bearing.
It has an integral, precision insertion mechanism that allows insertion of
the rotor to a precise depth in the pipe for optimal readings. Available
signal outputs include NPN open collector frequency, and/or reed
contact frequency or millivolt frequency. Optional indicators include
battery powered totalizers and loop powered rate meter/totalizers
with outputs and batch controllers. The DOR-5 may be installed
through a 2" ball valve to allow serviceability with minimal process
interruption. With its symmetrical design, the DOR may also be used
for bi-directional flow measurement when fitted with the quadrature
output option in conjunction with an appropriate discriminator circuit
or display.

Applications

● HVAC: Hot and Cold Water, Fire Systems, and Thermal
Energy Monitoring

● Municipal: Water Distribution, Water Management and
Water Treatment

● Irrigation: Water Management

● Water Treatment: Chlorination, Desalination and Mechanical
Filtration Plants, Chemical Injection Systems

● Refineries: Fire and Cooling Systems

● Power Generation: Boiler Feed Water, Steam Condensate,
Process Water and Water Balancing

● Chemical: Process & Cooling Tower Water, Chemical and
Water Batching

● Others: Cement Manufacturing, Flow Testing, Fire Truck
and Hydrant Flow Monitoring, Food Processing, Pulp/Paper,
Mining, and Fountains

Technical Details

Velocity Range (Linear): 1.0 ... 33 ft/s

Linearity: ±1.5% w/Well Established Flow Profile

Repeatability: ±1% of f. s. at Factory Conditions

and Optimal Straight Runs

Max Pressure: 1160 PSI

Temperature Range: 5 … 212 °F Standard, See Max. Allowable

Media Temperature Table for Other Options
and Restrictions

Materials

Body: 316L Stainless Steel

Rotor: PVDF or PEEK (Depending on

Model)

Rotor Shaft: 316L Stainless Steel

Bearing: Graphite/PTFE

Seals: FKM (Standard): 5 … 300 °F

EPR (Ethylene Propylene Rubber):

-40 … 260 °F
NBR (Nitrile): -40 … 260 °F

Electronics

Max. Frequency: 220 ... 240 Hz (Hall Effect and

Voltage Output)

73 ... 80 Hz (Reed Switch Output)

Wiring (Standard): 5 Ft. (DOR-42), 3 Ft. (DOR-52)

Transmission Distance: 3000 ft Maximum, without

Integrated Electronics

Protection Class: IP68 (Cable Connection)
Straight Piping
Requirement: Minimum: 10xd (Upstream), 5xd

(Downstream)
Optimal: 25xd (Upstream), 10xd
(Downstream)
Weight (Approx.): 3.6 lb (DOR-4), 5.5 lb (DOR-5)
without Electronics

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No responsibility taken for errors;

subject to change without prior notice.

Insertion Paddle Wheel Flow Meter / Monitor Model DOR

Electrical Output Specifications

Hall Effect Sensor Output (Fx, Nx, Qx)

The Hall Effect Sensor is a high resolution, solid state 3 wire device
providing an unsourced, open collector, NPN transistor output.
The term "unsourced" means that no voltage is applied to the
output from within the flowmeter. It must be pulled to a 'high' or
'on' state by 5 - 24VDC supplied from an external source, typically
the receiving instrument. The pulse output between signal and

-0V is a voltage square wave with the high level being the DC
voltage available at the open collector and the low level being

-0V. The receiving instrument must incorporate a pull up resistor
(typically greater than 10 kΩ) which ties the open collector to the
available DC voltage level when the Hall sensor is not energized.
When energized, the open collector output is pulled to ground
through the emitter (-0V). The power supply requirement is: 5 - 24
V

20 mA max.

DC,

Voltage Pulse Output (Fx)

A self generating 2 wire voltage pulse output with 1.5V voltage
spike of approximately 10 microseconds duration is generated
with no dependence on rotor speed.

Reed Switch Pulse Output (Rx)

The reed switch output is a two wire normally open SPST voltage
free contact ideal for installations without power or for use in
hazardous area locations (simple apparatus) when Intrinsically
Safe (I.S.) philosophy is adopted. When using the reed switch
output, the liquid temperature must not change at a rate greater
than 18 ºF per minute. In general, the reed switch life will exceed
2 billion actuations when switching less than 5VDC at 10mA. The
voltage/current limits are: 30 VDC max, 200 mA max.

DOR Series Nominal Flow Measuring Ranges
(Sch 40 Steel Pipe, 1...33 ft/s Fluid Velocity)

Line Size

(Sch. 40 Steel)

1-1/2" 6...210 10" 245...8,080

2" 10...345 12" 360...11,625

2-1/2" 15...490 14" 480...15,850

3" 25...760 16" 560...18,175

4" 40...1,300 18" 700...23,100

6" 90...2,975 20" 875...28,550

8" 160...5,170 24" 1,250...41,250

Nominal

Measuring

Range (GPM)

Line Size

(Sch. 40 Steel)

Nominal

Measuring

Range (GPM)

Quadrature Pulse Output (Qx)

Two Hall-Effect sensors are arranged to give separate outputs out
of phase with one another. The Quadrature output is commonly
used to provide verification of output signal integrity or to measure
bi-directional flow in conjunction with an appropriate discriminator
circuit or display. The power supply requirement is: 8 - 24 VDC,
20 mA max.

NPN Inductive Pick-up (Ex)

Inductive pick-up with non-magnetic rotor for applications with
high ferrous content liquids. The signal output is 3-wire, NPN
transistor. The power supply requirement is: 5 - 24 V

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

20 mA max.

DC,

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Insertion Paddle Wheel Flow Meter / Monitor Model DOR

Order Details (Example: DOR-42 2 F N8 F5 00)

Model Rotor/Shaft

DOR-42.. = Pipe Size

1½" ... 36"

DOR-52.. = Pipe Size
2" ... 100"

..2.. = PVDF/SS
(Max. 212 °F)

..4.. = PEEK/SS
(Max. 300 °F)

Sealing

Material

..F.. = FKM

(Standard)

..N.. = NBR

Mechanical
Connection

DOR-42 Options

..N8.. = 1½" NPT

Male

..N9.. = 2" NPT
Male

..R8.. = R 1½
Male

..R9.. = R2 Male

DOR-52 Options

..N9.. = 2" NPT

Male

..R9.. = R2 Male

Output/

Electrical Connection

..F0.. = NPN OC + 1.5V-Pulse +

Standard Cable
..F2.. = NPN OC + 1.5V-Pulse +
33' Cable
..F5.. = NPN OC + 1.5V-Pulse +
Terminal Box on Stem Kit

..N5*.. = NPN OC + Terminal Box
on Stem kit + High Temp.
Sensor

..R0.. = Reed Switch + Std. Cable
..R2.. = Reed Switch + 33' Cable
..R5.. = Reed Switch + Terminal

Box on Stem Kit

..Q0.. = 2x NPN OC + Std. Cable
..Q2.. = 2x NPN OC + 33' Cable
..Q5.. = 2x NPN OC + Terminal

Box on Stem Kit

..E0.. = Non-magnetic Rotor for
Ferrous Media, NPN,
Std. Cable
..E2.. = Non-magnetic Rotor for
Ferrous Media, NPN,
33' Cable
..E5.. = Non-magnetic Rotor for
Ferrous Media, NPN,
Terminal Box on Stem Kit

Electronics

..00 = Frequency

Output
Only

* Only available with PEEK rotor and sealing material: "F"

DOR Upstream/Downstream Straight Piping Requirements

Major obstructions, such as

pumps, valves, reducers or strainers

must be kept well outside of the

required straight run pipe sections

10 pipe dia. Minimum
25 pipe dia. Preferred

FLOW

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5 pipe dia. Minimum

10 pipe dia. Preferred

No responsibility taken for errors;

subject to change without prior notice.

Insertion Paddle Wheel Flow Meter / Monitor Model DOR

Process Temperature Limits

with Rotor and Output Options*

Rotor

PVDF 212 °F

PEEK 300 °F

Output Type

E0 - E2 185 °F

F0 -F2
R0 - R2
Q0 - Q2

F5, R5 260 °F*

N5 300 °F*

*

Must use PEEK rotor for all output options with
media temperatures > 212 °F. Additionally, be sure
to select an appropriate seal material suitable for
both media compatibility and the maximum media
temperature.

Max. Media

Temperature

212 °F/260°F*

Typical DOR Installation

Through-Valve Installation for DOR-52 series

Model DOR-52

Ball or gate valve:
female 2" NPT or R2
connection
NOTE: Minimum
internal diameter
to be 44.0 mm

2" NPT or R2
Nipple

Female 2" NPT or R2
Threadolet
NOTE: Minimum internal
diameter to be 44.0 mm

Insertion Depth =
1/8 of Pipe
Inner Diameter

Dimensions (mm)

DOR-42 DOR-52

ØA 1-½" or 2" NPT/R2 2" NPT/R2

B 198 444

Configuration H H

Terminal Box 385 869

All dimensions in mm, ± 2 mm

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

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