Signet 525 Metalex Flow Sensor
P525-1, P525-1S P525-2, P525-2S
retainer retainer
rotor pin
bearing
bearing
rotor
*P52590-1*
P52590-1 Rev. 19 12/18
Dimensions
P525-1, P525-1S
English
Operating Instructions
**
P525-2, P525-2S
P52509 & P52509-2 Rotor Kits
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SIGNET
38.4 mm
(1.5 in.)
27 mm
(1.06 in.)
* 7.6 m (25 ft) cable included
SIGNET
63.5 mm
(2.5 in.)
27 mm
(1.06 in.)
Specications
General
Operation Range ............... 0.5 m/s to 6 m/s (1.6 ft/s to 20 ft/s) (depending on pipe size)
Pipe Size Range ................DN15 to DN300 (½ in. to 12 in.)
Linearity ............................. ±1% of max. range @ 25 °C (77 °F)
Repeatability ...................... ±0.5% of max. range @ 25 °C (77 °F)
Wetted Materials
Sensor Body ...................... 316 SS (ACI type CF-8M per ASTM A351), DIN 17440
Rotor Material ....................17-4PH-1 Stainless Steel
Rotor Pin............................ Tungsten Carbide GRP 1 or 316 SS
Retainers (2) ......................316 stainless steel (1.4401)
Rotor Bearings (2) .............Carbon ber reinforced PTFE
Gasket ............................... KLINGER® sil C-4401 (supplied with tting)
Electrical
Frequency..........................39 Hz per m/s (12 Hz per ft/s) nominal
Amplitude...........................5 to 8 mV p-p per Hz
Source Impedance ............11.6 KΩ
Coil Inductance ..................3.5 Henrys @ 25 °C
Cable Length ..................... 7.6 m (25 ft), can be extended up to 61 m (200 ft)
Cable Type ........................22 AWG, 2-conductor w/shield
Maximum Temperature/Pressure Rating
Socket Weld or Weld-On
Mini-Tap ttings................ 103 bar @ 149 °C (1500 psi @ 300 °F)
Operating Temperature ......-18 °C to 149 °C (0 °F to 300 °F)
Standards and Approvals
• Manufactured under ISO 9001 for Quality,
ISO 14001 for Environmental Management and
OHSAS 18001 for Occupational Health and Safety.
• RoHS compliant
China RoHS (Go to www.gfsignet.com for details)
Warranty Information
45°
45°
15x I.D. 5x I.D.
20x I.D. 5x I.D.
40x I.D. 5x I.D.
50x I.D. 5x I.D.
Reducer
90° Elbow
2 x 90° Elbow
3 dimensions
Pump/Valve
Maintenance
Refer to your local Georg Fischer Sales oce for the most
current warranty statement.
All warranty and non-warranty repairs being returned must
include a fully completed Service Form and goods must be
returned to your local GF Sales oce or distributor.
Product returned without a Service Form may not be
warranty replaced or repaired.
Signet products with limited shelf-life (e.g. pH, ORP, chlorine
electrodes, calibration solutions; e.g. pH buers, turbidity
standards or other solutions) are warranted out of box but not
warranted against any damage, due to process or application
failures (e.g. high temperature,
mishandling (e.g. broken glass,
chemical poisoning, dry-out) or
damaged membrane, freezing
and/or extreme temperatures).
Product Registration
Thank you for purchasing the Signet line of Georg Fischer
measurement products.
If you would like to register your product(s), you can now
register online in one of the following ways:
• Visit our website www.gfsignet.com.
Under Service and Support click on
Product Registration Form
• If this is a pdf manual (digital copy), click here
The 525 sensor requires little or no maintenance of any kind,
with the exception of an occasional sensor/paddlewheel cleaning.
Paddlewheel Maintenance:
Paddlewheel ow sensors are subject to wear and may require
maintenance and replacement of mechanical parts (rotors,
pin, bearings, retainers, etc.). The frequency of recommended
maintenance will vary based upon application specications,
characteristics of the measured uid, and installation details.
These can include, but are not limited to: process owrate,
occurrence of water hammer, uid corrosiveness and
abrasiveness, sensor installation relevant to other equipment.
GF Signet oers individual replacement parts and rotor
replacement kits, which include replacement instructions,
allowing customers to perform eld maintenance and reduce
application down-time. Please refer to the Paddlewheel
Replacement section (page 4) or contact your local GF Sales
Representative with any questions.
Sensor Removal Procedure
1. Depressurize and drain pipe.
2. Remove the four sensor ange bolts and lock washers.
Pull upward on the sensor ange with an alternating
twisting motion.
Safety Information
1. Do not remove from pressurized lines.
2. Do not exceed maximum temperature and pressure
specications.
3. Pipe tting must be installed by certied welder only.
4. Do not install/service without following installation
instructions (see sensor manual).
5. Wear safety goggles and face shield during installation
and service.
6. Do not alter product construction.
7. Failure to follow safety instructions could result in severe
personal injury!
Caution / Warning / Danger
Indicates a potential hazard. Failure to follow all warnings
may lead to equipment damage, injury, or death
Personal Protective Equipment (PPE)
Always utilize the most appropriate PPE during
installation and service of Signet products.
Pressurized System Warning
Sensor may be under pressure, take caution to vent
system prior to installation or removal. Failure to do so
may result in equipment damage and/or serious injury.
Note / Technical Notes
Highlights additional information or detailed procedure.
2
Signet 525 Metalex Flow Sensor
WARNING!
Do not remove from pressurized lines.
Wear safety goggles and faceshield
during installation/service.
Location of Fitting
Recommended sensor
upstream and downstream
mounting requirements.
Reducer
15x I.D. 5x I.D.
2 x 90° Elbow
3 dimensions
40x I.D. 5x I.D.
2 x 90° Elbow
90° Elbow
Pump/Valve
Sensor Mounting Position
• Horizontal pipe runs: Mount
sensor in the upright (0°) position
for best overall performance.
Mount at a maximum of 45° when
air bubbles are present.
Do not mount on the bottom of
pipe when sediments are present.
• Vertical pipe runs: Sensor must be
mounted in lines with UPWARD
ow only.
25x I.D. 5x I.D.
20x I.D. 5x I.D.
50x I.D. 5x I.D.
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