Georg Fischer 2536 Specifications

Signet 2536 Rotor-X Paddlewheel Flow Sensors

Features

• Operating range 0.1 to 6 m/s (0.3 to 20 ft/s)

• Wide turndown ratio of 66:1

• Open-collector output

• Highly repeatable output

• Simple, economical design

• Installs into pipe sizes DN15 to DN900

PVC

Sensor

(gray body

and cap)

Standard

Sensor

(blue cap)

Integral

Sensor

Wet-Tap

Sensor

(½ to 36 in.)

• PVC 2536 version DN15 to DN100 (½ to 4 in.) for
concentrated Sodium Hypochlorite 12.5% applications

• High resolution and noise immunity

Simple to install with time-honored reliable
performance, Signet 2536 Rotor-X Paddlewheel Flow
Sensors are highly repeatable, rugged sensors that
o er exceptional value with little or no maintenance.
The Model 2536 has a process-ready open collector
signal with a wide dynamic fl ow range of 0.1 to 6 m/s
(0.3 to 20 ft/s). The sensor measures liquid fl ow rates in
full pipes and can be used in low pressure systems.

The Signet 2536 sensors are o ered in a variety of
materials for a wide range of pipe sizes and insertion
confi gurations. The many material choices including
PP and PVDF make this model highly versatile and
chemically compatible to many liquid process solutions.

Sensors can be installed in DN15 to DN900 (½ to 36 in.)
pipes (except the 2536 PVC versions, which can be
installed in DN15 to DN100 (½ to 4 in.) pipes), using
Signet’s comprehensive line of custom fi ttings. These
custom fi ttings, which include tees, saddles, and
weldolets, seat the sensor to the proper insertion depth
into the process fl ow. The sensors are also o ered in
confi gurations for wet-tap installation requirements.

• Test certifi cate included for -X0, -X1

• Chemically resistant materials

(3-2536-PX
version only)

Applications

• Pure Water Production

• Filtration Systems

• Chemical Production

• Liquid Delivery Systems

• Pump Protection

• Scrubber/Gas Stacks

• Gravity Feed Lines

• Not suitable for gas

• Sodium Hypochlorite transfer/
injection/batching (3-2536-U0)

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Specifi cations

General

Operating Range 0.1 to 6 m/s 0.3 to 20 ft/s

Pipe Size Range DN15 to DN900 ½ to 36 in.

PVC DN15 to DN100 ½ to 4 in.
Linearity ±1% of max. range @ 25 °C (77 °F)
Repeatability ±0.5% of max. range @ 25 °C (77 °F)

Min. Reynolds Number Required 4500

Wetted Materials

Sensor Body Glass-fi lled PP (black), PVDF (natural) or PVC (gray)

O-rings

Rotor Pin Titanium, Hastelloy-C or PVDF; optional Ceramic, Tantalum or Stainless Steel
Rotor Black PVDF or Natural PVDF; optional ETFE, with or w/o carbon fi ber reinforced PTFE

Electrical

Frequency 49 Hz per m/s nominal 15 Hz per ft/s nominal

Supply Voltage 5 to 24 VDC ±10%, regulated

Supply Current <1.5 mA @ 3.3 to 6 VDC <20 mA @ 6 to 24 VDC
Output Type Open collector, sinking 10 mA max.
Cable Type 2-conductor twisted pair with shield, 22 AWG
Cable Length 7.6 m (25 ft) can be extended up to 305 m (1000 ft) maximum

Max. Temperature/Pressure Rating - Standard and Integral Sensor

PP 12.5 bar @ 20 °C 180 psi @ 68 °F

PVDF 14 bar @ 20 °C 200 psi @ 68 °F

PVC 12.5 bar @ 20 °C 180 psi @ 68 °F

Operating Temperature

PP -18 °C to 85 °C 0 °F to 185 °F

PVDF -18 °C to 85 °C 0 °F to 185 °F

PVC 0 °C to 50 °C 32 °F to 122 °F

Max. Temperature/Pressure Rating - Wet-Tap Sensor

PP 7 bar @ 20 °C 100 psi @ 68 °F

Operating Temperature -18 °C to 60 °C 0 °F to 140 °F
Max. Wet-Tap Sensor Removal

Rating

Shipping Weight

3-2536-X0 0.454 kg 1.00 lb

3-2536-X1 0.476 kg 1.05 lb

3-2536-X2 0.680 kg 1.50 lb

3-2536-X3 0.780 kg 1.72 lb

3-2536-X4 0.800 kg 1.76 lb

3-2536-X5 0.880 kg 1.94 lb

3-8512-X0 0.35 kg 0.77 lb

3-8512-X1 0.37 kg 0.81 lb

Standards and Approvals

CE, FCC, NSF (3-2536-PX only)

RoHS compliant, China RoHS

Manufactured under ISO 9001 for Quality and ISO 14001 for Environmental Management and

OHSAS 18001 for Occupational Health and Safety

FPM (std) optional EPR (EPDM) or FFPM

sleeve for rotor pin

1.7 bar @ 85 °C 25 psi @185°F

1.7 bar @ 85 °C 25 psi @ 185 °F

6.9 bar @ 60 °C 100 psi @ 140 °F

1.4 bar @ 60 °C 20 psi @ 140 °F

1.7 bar @ 22 °C 25 psi @ 72 °F

See Temperature and Pressure Graphs for more information

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