Signet 2552 Metal Magmeter Flow Sensor

Signet 2552 Metal Magmeter Flow Sensor

Table of Contents


Signet 2552 Metal Magmeter Flow Sensor from Georg Fischer features all-stainless steel construction. The PVDF nosepiece and FKM O-rings are the only other wetted materials. The 2552 installs quickly into standard 1¼ in. or 1½ in. pipe outlets, and is adjustable to fit pipes from DN50 to DN2550 (2 to 102 in.). Two sensor lengths allow maximum flexibility to accommodate a variety of hardware configurations, including ball valves for hot-tap installations.

When equipped with the frequency output, the 2552 is compatible with any externally powered Signet flow instrument, while the digital (S3L) output enables multi-channel compatibility with Signet 8900, 9900 or 9950 Multi-Parameter instruments. Select the blind 4 to 20 mA current output to interface directly with data loggers, PLCs or telemetry systems. Key features include Empty Pipe Detection, LED-assisted troubleshooting, and bi-directional span capability (in 4 to 20 mA models).

The Signet 3-0252 Configuration Tool is available to customize every performance feature in the 2552 so it can be adapted to the user’s application requirements.

Signet 2552 Metal Magmeter Features

  • NIST test certificate included
  • Award winning hot-tap magnetic flow sensor up to DN2550 (102 in.)
  • Patented Magmeter technology*
  • Operating range 0.05 to 10 m/s (0.15 to 33 ft/s)
  • Reliable operation in harsh environments
  • Repeatable: ±0.5% of reading @ 25 °C
  • Three output options: 4 to 20 mA, Frequency/Digital (S3L)
  • ISO or NPT Threads


  • Municipal Water Distribution
  • Process and Coolant Flow
  • Chemical Processing
  • Wastewater
  • Mining Applications
  • Water Process Flow
  • HVAC

Signet 2552 Metal Magmeter Specifications

Operating Range Minimum 0.05 m/s 0.15 ft/s
Maximum 10 m/s 33 ft/s
3 m/s 10 ft/s
Pipe Size Range DN50 to DN2550 2 to 102 in.
Linearity ± 1% reading plus 0.1% of full scale
Repeatability ±0.5% of reading @ 25 °C
Accuracy ±2% of measured value*
*In reference conditions where the fluid is water at ambient temperature, the sensor is inserted at the correct depth and there is a fully developed flow profile which is in compliance with ISO 7145-1982 (BS 1042 section 2.2)
Minimum Conductivity 20 µs/cm
Wetted Materials
Body and Electrodes 316L stainless steel
Insulator PVDF
O-rings FKM
Cable 4-cond + shield, PVC jacket (Fixed cable models) or Water-resistant rubber cable assembly with Turck® NEMA 6P connector
Power Requirements
4 to 20 mA 24 VDC ±10%, regulated, 22.1 mA maximum
Frequency 5 to 24 VDC ±10%, regulated, 15 mA maximum
Digital (S3L) 5 to 6.5 VDC 15 mA maximum
Reverse Polarity and Short Circuit Protected
Cable Options
Fixed Cable 7.6 m
Detachable water tight sensor cable with Turck® connector (sold separately) two lengths: 4 m (13 ft) or 6 m (19.5 ft)
Current Output (4 to 20 mA) Programmable and Reversible
Loop Accuracy 32 µA max. error (@ 25 °C @ 24 VDC)
Temperature Drift ±1 µA per °C max.
Power Supply Rejection ±1 µA per V
Isolation Low voltage < 48 VAC/DC from electrodes and auxiliary power
Maximum Cable 1000 ft
Maximum Loop Resistance 300 Ω
Error Condition 22.1 mA
Frequency Output Compatible with Signet 8900, 9900, 9900-1BC and 9950
Maximum Pull-up Voltage 30 VDC
Short Circuit Protected ≤30 V @ 0 Ω pull-up for one hour
Reverse Polarity Protected to -40 V for 1 hour
Overvoltage Protected to +40 V for 1 hour
Maximum Current Sink 50 mA, current limited
Maximum Cable 1,000 ft
Digital (S3L) Output Compatible with Signet 8900, 9900, 9950 and 0486
Serial ASCII, TTL level 9600 bps
Maximum Cable Application dependent (See 8900 or 9900 manual) in non-icing conditions
Operating Temperature Ambient (non-icing conditions) 5 °F to 158 °F
Media 5 °F to 185 °F
Max. Operating Pressure 20.7 bar @ 25 °C 300 psi @ 77 °F
Hot-Tap Installation Requirements
Maximum Installation Pressure 300 psi
Maximum Installation Temp (Insertion/Removal) 104 °F
Do not use hot-tap installation where  temperatures will exceed 40 °C or if hazardous liquids are present.
Shipping Weights
3-2552-2X-A-11/A-12 2.50 kg 5.51 lb
3-2552-2X-B-11/B-12 2.30 kg 5.07 lb
3-2552-3X-A-11/B-11/A- 4.00 kg 8.81 lb
Standards and Approvals CE, FCC
RoHS compliant, China RoHS
NEMA 4 (IP65) Fixed cable models
NEMA 6P (IP68) Submersible cable models only. Signet recommends maximum 3 m (10 ft) submersion depth for maximum 10 days continuous submersion.
Manufactured under ISO 9001 for Quality and ISO 14001 for Environmental Management and OHSAS 18001 for Occupational Health and Safety

Model 2552
Ordering Notes
1) Sensor insertion depth
is the distance from the
bottom of the sensor
housing to the tip of the
2) Hot-Tap installations
require a 1¼ in. or 1½ in.
ball valve.
3) See Sensor Selection
Guide on previous page
to determine the sensor
length required.
Accessories and Replacement Parts
Application Tips
• Minimum process liquid
conductivity requirement
is 20 μS/cm.
• 1½ x 1¼ inch and 2 x 1¼
inch (2552-1 and 2552-2
only) retrofit adapters are
available for replacement
installations of Signet
2550 and 2540 sensors

Download Datasheet: Signet 2552 Metal Magmeter Flow Sensor

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