Georg Fischer 2507 Operating Manual
Signet 2507 Mini Flow Sensor
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*3-2707.090*
3-2507.090 Rev. K 11/05 English
SAFETY INSTRUCTIONS
1. Do not remove from pressurized lines.
2. Confirm chemical compatibility before use.
3. Do not exceed maximum temperature/pressure specifications.
4. Wear safety goggles or faceshield during installation/service.
5. Do not alter product construction.
6. Failure to follow safety instructions could result in severe personal injury.
English
1. Description
The Signet 2507 Mini Flow Sensor contains a free-running rotor
which is driven by the fl uid fl ow. Within the given measurement
range, the rotational speed of the rotor is proportional to the fl uid
fl ow rate. Permanent magnets built into the rotor actuate an
electronic switch in the top of the sensor generating a squarewave output signal proportional to fl ow rate. Both opaque and
transparent fl uids can be measured from 0.2 to 20.0 centistokes.
Wetted sensor parts are constructed of PVDF and FPM, making
the sensor suitable for use with most process fl uids, including
most acids, bases, light oils, and solvents.
WARNING!
2. Specifi cations
General
Compatibility:
Flow Sensor
2507
3-5075
Flow Range:
• -2V sensor: 400 to 2800 mL/m (0.105 to 0.740 U.S. gpm)
• -3V sensor: 700 to 4200 mL/m (0.185 to 1.123 U.S. gpm)
• -4V sensor: 1300 to 6000 mL/m (0.343 to 1.585 U.S. gpm)
• -6V sensor: 3200 to 12000 mL/m (0.845 to 3.170 U.S. gpm)
Linearity: ±0.25% of full range
Repeatability: ±0.25% of full range
Viscosity range: 0.2 to 20.0 centistokes
Pipe connections: G
1
/4 in. ports, 1/4 in. NPT (male) pipe adapters
(2 included)
Cable length: Std: 7.6m (25 ft.), max.: 300 m (1000 ft.)
Cable type: 2-conductor shielded, twisted-pair, 22 AWG
Shipping Weight: 0.4 kg (0.8 lb.)
Instrument Options
3-8150-1
3-5500
3-5090
3-5600
3-8550
3-8900
Cable plug
Upper body with
electronic switch
25 ft. cable
FLOW
1
G
/4 in.
port threads
Lower body with
built-in rotor
Pipe fitting adapte
G 1/4 x 1/4 in. NPT
(2 included)
Polar organic solvents (i.e., ketones and chlorinated
hydrocarbons) and aromatic hydrocarbons are not
compatible with this sensor.
Wetted Materials
• Housing: PVDF
• Flow insert: PTFE
• Quad ring seal: FPM
• Rotor: PVDF
• Pipe thread adapters: PVDF
• Suitable for clean fl uids only
Electrical
Power: 5 to 24 VDC @ 10 mA max.
Output type: Open-collector transistor, 10 mA max.
sink
Max. pressure/temperature:
• 5.5 bar @ -30°C (80 psi @ -22°F)
• 5.5 bar @ 24°C (80 psi @ 75°F)
• 3 bar @ 120°C (45 psi @ 248°F)
Pressure Drop:
Pressure Drop Across Sensor vs. Flow Rate
PSI
BAR
1.50
21.76
18.13
14.50
10.88
7.25
3.63
1.25
1.00
0.75
0.50
0.25
02040607080
Flow rate (%) of full scale
-2V
-3V
-4V
-6V
psi
bar
100
6.9
80
5.5
60
4.
1
40
2.8
20
1.4
0
-40 0 40 80 120 160 200 240 280
-40 -18 4 27 49 71 93 116 138
°F
°C
Dimensions:
95 mm (3.74 in.)
FLOW
68 mm (2.7 in.)
Mounting tabs (3),
#8 or M4 self-tapping
screws required
(customer supplied)
32.5 mm (1.28 in.)
bolt circle
65 mm
(2.6 in.)
3. Installation
• The sensor may be installed in any position, although
horizontal fl ow is recommended (the sensor mounted upright).
If the sensor is not installed upright, the linearity error may be
greater in the lower part of the sensor's measurement range.
• Mounting tabs are provided using #8 or M4 self-tapping
screws (customer supplied). See Dimensions illustration for
mounting tab hole pattern specifi cations.
• Install sensor with the arrow pointing in the direction of fl ow.
• Always maximize distance between the sensor and pump
source. Never install immediately downstream of valves,
fi ttings, etc. For optimum performance, a straight fl ow run of at
least 100 to 150 mm (4 to 6 in.) should be provided before and
after the sensor.
• Two pipe fi tting adapters (included) convert the G
1
/4 in. straight
threads to 1/4 in. NPT pipe threads. Hand tighten only! Apply
1-2 turns of sealing tape to all threaded connections to prevent
leaks.
CAUTION!
Use an adjustable wrench to prevent the fi tting
adapters from overtightning while installing
mating pipe connectors. Sensor damage will
occur if the ports are overtightened.
Pipe Fitting
Adapters
(included)
FLOW
FLOW
100-150 mm (4-6 in.)
Mounting
tabs (3)
Hand
tighten
only!
Coupling
100-150 mm (4-6 in.)
Compatible pipe/tubing connections (customer supplied):
Female SxT
coupling
Female TxT
coupling
Female TxT
coupling
Female TxT
union
Installation Hints
• Avoid vibrations and shocks
• Avoid solids in the fl uid
• Install a fi lter or line strainer upstream to protect sensor
Pipe or
tubing
Hose
adapter
4. Wiring Details
4.1 Cable Extensions
The standard 25 foot sensor cable can be extended to 300 m
(1000 ft.) using 2-conductor shielded twisted-pair cable.
• Always maintain cable shield through cable splice.
• For splice-free cable replacement up to 300 m (1000 ft.), refer
to the sensor plug connection diagram (below) for connection
details.
2
Sensor Power:
5 to 24 VDC
(Black wire)
1
Sensor
ground
2
(Silver wire)
Disregard ground
symbol on connector
Sensor Signal Output
(Red wire)
Sensor
Plug (side)
Max cable length:
300 m (1000 ft.)
Signet 2507 Mini Flow Sensor
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