Kobold DMH Specifications
Magnetic Inductive
Flowmeter
for conductive liquids
measuring
•
monitoring
•
analyzing
DMH
Measuring Range: 0.29...26.4 to
431.6…43,333 GPM
Accuracy: ± 0.3% of Reading
± 0.01% x Q
p
: 580 PSI; t
max
Connection: Flange ASME ½" ... 24"
Lining Material: Hard Rubber,
max
Soft Rubber, or PTFE
Output: Analog with HART
Pulse, and Status
KOBOLD companies worldwide:
ARGENTINA, AUSTRIA, BELGIUM, BULGARIA, CANADA, CHILE, CHINA, COLUMBIA, CZECH
REPUBLIC, EGYPT, FRANCE, GERMANY, GREAT BRITAIN, HUNGARY, INDIA, INDONESIA, ITALY,
MALAYSIA, MEXICO, NETHERLANDS, PERU, POLAND, ROMANIA, SINGAPORE, SOUTH KOREA,
SPAIN, SWITZERLAND, TAIWAN, THAILAND, TUNISIA, USA, VIETNAM
: 300 °F
max
KOBOLD Instruments, Inc.
1801 Parkway View Drive
Pittsburgh, PA 15205
Main Of ce:
1.412.788.2830
1.412.788.4890
info@koboldusa.com
www.koboldusa.com
®
,
03 - 2013
1
Magnetic Inductive Flowmeter Model DMH
Description
The KOBOLD DMH fl owmeter is used to measure and
monitor the volume fl ow rate of liquids, pulps, pastes, and
other electrically conductive medias without loss of pressure.
When an electrically conductive media passes through a
directional magnetic fi eld, a voltage is induced in accordance
with Faraday’s Law of Induction.
The measured voltage is proportional to the mean rate of fl ow
and consequently also to the volumetric fl ow rate.
The fl owmeter consists of a sensor that picks up the measuring signal generated from the induced voltage, and a transducer that converts this signal into a standardized output signal
(4-20mA or pulse). The measuring transducer can be connected to the sensor directly or mounted remotely.
Pressure, temperature, density, and viscosity do not affect
the volume measurement. Large solids and gas bubbles
should be avoided.
The signifi cant properties exhibited by DMH include:
great choice of linings
stainless steel, Hastelloy, tantalum, platinum, or titanium
electrodes
wide variety of process connections
can be used in rough ambient conditions
Fields of application
acids, alkalis
pastes
drinking water, waste water
beer, wine, milk, mineral water
spirits, molasses, fruit juice
soft cheese etc.
Technical data
Adjustable measuring
range terminal values: 0.5...10 m /s
Minimum conductivity: ≥5 μS /cm
(for liquids in general)
≥20 μS/cm
(demineralized water)
Accuracy: ±0.3 % of read. ± 0.01 % x Q
Repeatability: ±0.15 % of read. ± 0.005% x Q
max
max
(reference conditions: water,
measured medium
temperature of
72°F ±4K,
ambient temperature 72 °F ±2K,
inlet ≥ 10 x pipe diameter,
outlet ≥ 5 x pipe diameter,
Q
at 10 m/s)
max
Process temperature: 32 ... + 176 °F
(hard rubber, soft rubber)
-4 ... +300 °F (PTFE)
Ambient temperature: -4 ... +140 °F,
depending on process temperature
Rated pressure: ASME 150 lb
½" … 24"
ASME 300 lb
½" … 24"
higher pressures upon request
Sensor materials
Linings: hard rubber, soft rubber, or PTFE
Reference/Grounding
Electrodes: stainless steel, Hastelloy C4,
tantalum, platinum, titanium, and
other materials upon request
Housing: enameled steel
Process connection: enameled steel or enameled 304
stainless steel fl ange ASME B16.5,
other connections upon request
Nominal sizes: ½" to 24"
other nominal sizes upon request
Protection type: IP 67 (IP 68 upon request)
Transmitter UMF2
Display: 2-line, lighted
fl ow, counter (forward + backward)
Operation: 6 buttons
Assembly type: compact or remote
Housing: enameled die-cast aluminum
rotatable in 90° steps
Outputs: galvanically isolated
Analog: 1 x 4-20 mA
load: <600 Ω (>250 Ω for HART
®
)
2
www.koboldusa.com
No responsibility taken for errors;
subject to change without prior notice.
03 - 2013
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