PORTABLE ENHANCED
DOPPLER FLOW METER
The Series 902 Portable Enhanced Ultrasonic
Doppler Flow Meter provides accurate and
reliable readings on closed full pipe applica
containing relatively clean liquids as well as
liquids with higher concentrations of
suspended solids or aeration. Clamp-on
non-invasive transducers permit the
instrument to be installed in minutes without
interrupting the system pressure or flow,
providing a simple and cost-effective solution
to flow verification. The Series 902 transduc
function on metal or plastic pipes size ¼” (6
mm) and above. They have a NEMA 6P
(IP-68) rating, and have the ability to work
with temperatures up to +400 °F (+200 °C).
tions
ers
Series 902
The Dynasonics Series 902 is designed for
rugged field use in its NEMA 4 watertight
enclosure. The rechargeable battery housed
inside of the 902 enclosure provides a full
eight hours of continuous operation. A
complete 902 flow meter system includes
one set of transducers, one tube of acoustic
couplant, two mounting straps, a power cord
and a 4-20 mA cable.
FEATURES
Clamp-on non-invasive transducers provide simple and
cost effective flow measurement.
NEMA 6P (IP-68) rated transducers and NEMA 4
(IP-65) enclosure.
Reliable readings on closed full pipes
size ¼" (6 mm) and above.
Rechargeable battery with eight hours of continuous
operation included.
Standard 4-20 mA output.
Ability to measure relatively clean liquids as well as
liquids containing higher concentrations of suspended
solids or aeration.
Accuracy of ±2% full scale and repeatability of ±0.4%
of full scale.
Measures fluid velocities from 0.5 to 20 FPS (0.15 to 6 MPS).
For applications such as ground water, lifting stations,
wastewater sludges, and mining recirculate.
DIVISION OF RACINE FEDERATED INC.
www.dynasonics.com800.535.3569
TM
PRINCIPLE OF OPERATION / TRANSDUCER OPTIONS
Series 902 Series 902
The Series 902 flow meter operates by transmitting ultrasonic
sound from its transmitting transducer through the pipe wall
into the flowing liquid. Each transducer contains piezoelectric
crystals to transmit this signal. The sound will be reflected by
useful sonic reflectors
suspended within the liquid
recorded by the receiving transducer (see Figure 1). If the
sonic reflectors are moving within the sound transmis
and
sion path,
sound waves will be reflected at a frequency shifted (Doppler
shift) from the transmitted frequency. The difference
the reflected frequencies and transmitted frequencies is
proportional to the speed of the
sonic reflectors, resulting in a
between
directly
liquid flow rate that is converted to various user defined
measuring units.
DIMENSIONAL
S
PECIFICATIONS
MECHANICAL DIMENSIONS: INCHES (mm)
11.60
(294.64)
Figure 1
17.50
(444.50)
6.90
(175.26)
D902/D903
Two Coiled Cables
Standard Length
20 Feet (6 mm) each
D912/D913
Two Coiled Cables
Standard Length
20 Feet (6 mm) each
4.38
(111.3)
4.05
(102.9)
1.91
(48.5)
1.45
(36.8)
1.70
(43.2)
1.38
(35)
D922/D923
Two Coiled Cables
Standard Length
20 Feet (6 mm) each
D932/D933
Two Coiled Cables
Standard Length
20 Feet (6 mm) each
TRANSDUCER IN
4.38
(111.3)
4.05
(102.9)
POWER IN
4-20 mA SIGNAL IN
1.91
(48.5)
3.24
(82.3)
1.45
(36.8)
2.85
(72.4)
1.38
(35)
MAX. PIPE
DIA
1.38
(35)
MAX.
PIPE
DIA
S
PECIFICATIONS
T
RANSMITTER
DESCRIPTION SPECIFICATION
Power Requirements Internal Lead acid Gel Cell battery provides 8 hours of continuous operation. AC charging: (Std) 115/230 VAC 50/60 Hz
±10%. (Opt) 100/200 VAC 50/60 Hz ±10%. (Opt) 12 VDC
Flow Range 0.5 to 20 FPS (0.15 to 6 MPS)
Outputs 4-20 mA, 600 Ohms max. isolated
Indicators Power, Signal Strength, Flow Analyzer, Read Fault, Overrange, Charging and Low Battery
Display 2 line × 20 character alphanumeric LCD (blacklit). Digit height 0.2 inches (5 mm), 6 digit rate, 6 digit totalizer (resettable)
Units User configured
3
Rate U.S. (Metric) FPS, GPM, MGD (MPS, LPM, M
3
Totalizer U.S. (Metric) Gallons (liters, M
Ambient Conditions -22 to +160 °F (-30 to +70 °C), 0-95% relative humidity, non-condensing.
Enclosure NEMA 4, (IP-65) ABS with SS hardware. 11W × 17L × 8D inches (279W × 432L × 203D mm)
Accuracy ±2% Full Scale
Sensitivity 0.4% of Full Scale
Repeatability ±0.4% of Full Scale
Response Time 5-50 seconds, user configured, to 90% of value, step change in flow
T
RANSDUCERS
DESCRIPTION SPECIFICATION
)
/hr)
Liquid Requirements 25 ppm of 30 micron size suspended solids or entrained gases.
Transducer Cable (Std) 20 feet (6 mm), retractable cord.
Pipe Sizes (Std) 1 inch (25 mm) and above
(Small pipe) 1/4 to 1 inch (6 to 25 mm)
Housing Material Standard Clamp-On: NEMA 6P (IP- 68) -40 °F to +210 °F (-40 °C to +100 °C) CPVC, Ultem®, Nylon,
PVC (Cable Jacket), Aluminum (small pipe)
High Temp Clamp-On: NEMA 4 (IP- 65) -40 °F to +400 °F (-40 °C to +200 °C) Vespel®, Anodized Aluminum,
Nickel-plated brass, Teflon
PART NUMBER
C
ONSTRUCTION
D9
Measuring Units/
Transducer Type*
02) US
03) Metric
12) US (High Temp)
13) Metric (High Temp)
22) US (Small Pipe)
23) Metric (Small Pipe)
32) US (High Temp &
Small Pipe)
33) Metric (High Temp &
Small Pipe)
*High Temp (+400 °F)
Small Pipe (1/4" - 1")
Power Supply
A) 115 VAC
B) 230 VAC
C) 100 VAC
D) 200 VAC
E) 12 VDC
Note: The Series D902 is shipped with one set of
standard transducers, acoustic couplant, two
mounting straps, power cord and a 4-20mA cable.
Output 1
1) 4-20mA
Totalizer
A) Six digit resettable
®
(Cable Jacket)
Output 2
N) None
NNA1
Approvals
N) None
Options
N) U.S. Power Cord
E) U.K. Power Cord
G) Euro Power Cord
SPARE PARTS AND ACCESSORIES
Description Part Number
Std Temp/Std Pipe Transducer D070-1004-001
High Temp/Std Pipe Transducer D070-1006-001
Std Temp/Small Pipe Transducer D070-1004-003
High Temp/Small Pipe Transducer D070-1004-005
Gel Cell Battery D005-1201-001
Couplant, Silicone
(for temporary mounting) D002-2011-001
U.S. Power Cord D005-2109-002
TECHNOLOGY
S
ELECTION GUIDE
Liquid Type (in order of increasing % of suspended solids)
Ultrapure Liquids
Deionized Water
Water Filter-Bed Effluent
Hydraulic Oil
Refined Hydrocarbons
Beverages
Well Water
Reclaimed Water
Cooling Tower
Ground Water
Raw Sewage
Gray Water
Beverages - Carbonated
Waste Activated Sludge
Return Activated Sludge
Series 902
This guide provides general rules for
Transit Time
the selection of an appropriate
Dynasonics ultrasonic technology –
it is neither exhaustive nor absolute.
System factors such as
temperature, pipe materials,
suspended solid composition and
liquid velocity can influence product
selection. It is best to present
application information to a
Dynasonics Sales Representative or
to the Dynasonics factory for
evaluation.
Dynasonics offers the most
comprehensive line of ultrasonic
transit time and Doppler flow
meters in the world. These meters
are clamp-on, non-invasive flow
meters that require a good
acoustical path between the
outside of the pipe and the liquid
inside. In some instances, such as
non-saturated concrete pressure
Enhanced Doppler
pipe, ultrasonic energy will not
readily pass. For these installations,
Dynasonics offers the Series MFX
MagProbe
Please consult a Dynasonics Sales
Representative or the Dynasonics
factory to discuss the use of these
products in your flow measurement
application.
TM
.
Mining Slurries
Filter Backwash
Paper Pulp Stock
Dredging Applications
Preprocessed Crude Oil
Primary Sludge
Lime Sludge
Digested Sludge
Concrete
8635 Washington Ave.
Tel: 262.639.6770
Fax: 262.639.2267
www.dynasonics.com
Doppler
Racine, WI 53406-3738 USA
800.535.3569 North America
800.732.8354 North America
Dynasonics is a trademark of Racine Federated Inc.
Ultem is a registered trademark of General Electric Co.
Vespel and Teflon are registered trademarks of
E.I. duPont de Nemours and Company
FORM 902 6/07
Racine Flow Meter Group
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