+GF+ SIGNET P525-2S Metalex Flow Sensor Pressure Temperature Paddlewheel Flowmeter

The +GF+ SIGNET P525-2S Metalex Flow Sensor is a premium, insertion-style paddlewheel flowmeter engineered to deliver unmatched performance in the most demanding applications . As part of the renowned 525 Series from Georg Fischer's SIGNET line, this sensor combines robust 316L stainless steel construction with proven paddlewheel technology to provide accurate and repeatable flow measurement where standard plastic sensors cannot survive.

What is the +GF+ SIGNET P525-2S?

The P525-2S is a specific model within the Metalex 525 Series, designed for pipe sizes ranging from DN32 to DN300 (1¼ to 12 inches) . The "-2S" designation indicates a sensor configured for "weld-on mini-tap" fittings with a 316 Stainless Steel shaft and pin . Unlike powered flowmeters, this is a passive, self-generating device. It requires no external power; the flowing fluid spins the paddlewheel, which generates a sinusoidal frequency signal directly proportional to the flow velocity .

Unmatched Performance in Harsh Environments

What sets the P525-2S apart is its ability to withstand extreme process conditions that would destroy ordinary flow sensors.

Extreme Pressure & Temperature: Built for high-pressure lines, it operates flawlessly at pressures up to 103 bar (1500 psi) when paired with the correct weld-on fittings . It handles process temperatures up to 149°C (300°F) , making it ideal for hot processes like boiler feedwater .

Superior Materials: The wetted materials are selected for durability and corrosion resistance. The housing is machined from solid 316L stainless steel, the paddlewheel is made from CB7Cu-1 alloy, and the "-2S" variant specifically features a 316 Stainless Steel shaft for excellent resistance in corrosive environments .

Intrinsically Safe Design: The sensor is passive and generates its own signal. It is FM Approved for use in hazardous locations (Class I, II, III; Division 1; Groups A-G) when used with appropriate safety barriers, allowing installation in explosive atmospheres .

Technical Specifications (Specs)

For engineers and procurement specialists, precision is key. The +GF+ P525-2S delivers reliable data with high accuracy.

Flow Range: 0.5 to 6 m/s (1.6 to 20 ft/s) 

Linearity: ±1% of full scale 

Repeatability: ±0.5% of full scale 

Output Signal: Sine wave (frequency), self-generating (12 Hz per ft/s nominal) 

Electrical Connection: 7.6 m (25 ft) integrated two-conductor shielded cable, extendable up to 60 m 

Shaft Material: 316 Stainless Steel 

Wetted Seals: KLINGER® sil C-4401 

Compatible Instruments: Works seamlessly with SIGNET transmitters and controllers such as the 5075, 5500, 5600, 8150, 8550, and 8900 .