Signet 3-2540-3S Flow Sensors

Signet 3-2540-XX Paddlewheel Flow Sensors

3-2540-XX Stainless Steel High Performance Flow Sensor

Item#: 159001503 | Model#: 3-2540-3S | Series#: 3-2540-XX

Price: $112300 $106685

Availability: Ships within 2 to 3 weeks
$112300 $106685 /ea

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2540 Stainless Steel High Performance Flow Sensor

The Signet 2540 Paddlewheel Flow Sensor offers the strength and corrosion-resistance of stainless steel for liquid applications with low velocity measurements. Unique internal circuitry eliminates the need for magnets in the process fluid, enabling flow measurement of 0.1 to 6 m/s (0.3 to 20 ft/s) while maintaining the advantages of insertion sensor design. Ultraflon™ 500C bearings and a Tungsten Carbide pin provide exceptional wear resistance. The Signet 2540 Paddlewheel Flow Sensor offers field-replaceable electronics and transient voltage suppression (TVS) to provide greater immunity to large voltage disturbances (i.e. lightning) sometimes encountered in field wiring. Sensors can be installed in DN40 to DN600 (1½ to 24 in.) pipes using the 1½ inch NPT or ISO 7/1-R 1.5 threaded process connection. The sensors are also offered in a hot-tap configuration with a bleed valve service without process shutdown in pipes up to DN900 (36 in.). Both styles of sensors must be used in full pipes and can be used in low pressure systems.

Fields of Application:
  • HVAC
  • Turf Irrigation
  • Cooling Systems
  • Filtration Systems
  • Water Distribution
  • Leak Detection
  • Pump Protection
  • Ground Water Remediation
  • Gravity Feed Line
  • CE
  • FCC
  • ROHS Compliant
  • China RoHS
  • Operating range: 0.1 to 6 m/s (0.3 to 20 ft/s)
  • Field replaceable electronics
  • Non-magnetic RF detection
  • Standard NPT or ISO process connections
  • Hot-tap versions for installation/service without system shutdown
  • For pipe sizes up to DN900 (36 in.)
  • 7.6 m (25 ft) cable
  • Adjustable sensor - one size for entire pipe range
3-2540-3S Product Specific Data
Mounting option 1½ inch NPT thread, hot tap design*
Rotor Pin MaterialStainless Steel
General Data
Operating Range0.1 to 6 m/s - 0.3 to 20 ft/s
Pipe Size Range Standard VersionDN40 to DN600 - 1½ to 24 in.
Pipe Size Range Hot-Tap VersionDN40 to DN900 - 1½ to 36 in.
Sensor Fitting Options1½ in. NPT threads - ISO 7/1-R 1.5 threads
Linearity±1% of full range
Repeatability±0.5% of full range
Body316 stainless steel (1.4401)
Fitting316 stainless steel (1.4401)
Fitting O-ringsFPM, optional EPR (EPDM)
Rotor17-4 SS Alloy
Rotor PinTungsten Carbide GRP 1 (standard) stainless steel (optional)
Retainers (2)316 stainless steel (1.4401)
Rotor Bearings (2)Carbon fiber reinforced PTFE
Frequency15 Hz per ft/s nominal
Power5 to 24 VDC ±10%, regulated, 1.5 mA max.
Output TypeOpen collector, sinking, max 10.0 mA
Cable Length7.6 m (25 ft), can be extended up to 300 m (1,000 ft)
Cable Type2-conductor twisted-pair with shield, 22 AWG
Sensor with standard FPM sensor fitting O-rings17 bar @ 82 °C - 250 psi @ 180 °F
Sensor with optional EPR (EPDM) sensor fitting O-rings17 bar @ 100 °C - 250 psi @ 212 °F
Operating Temperature-18 °C to 100 °C 0 °F to 212 °F
Shipping Weight 3-2540-1/-2/-1S/-2S1.79 kg, 3.9 lb
Shipping Weight 3-2540-3/-4/-3S/-4S2.15 kg , 4.7 lb
Standards and ApprovalsCE, FCC
Standards and ApprovalsRoHS compliant, China RoHS
Standards and ApprovalsManufactured under ISO 9001 for Quality and ISO 14001 for Environmental Management and OHSAS 18001 for Occupational Health and Safety
Product Dimensions
Weight8.36 lb
Width70.00 mm, 2.76 in
Height600.00 mm, 23.62 in
Length120.00 mm, 4.72 in
Document TitleDownload
Instruction ManualsClick Here to Download
DatasheetsClick Here to Download
CertificatesClick Here to Download
IDShort DetailsPrice 
1220-0021Replacement o-ring, (1) FPM$4.00
1224-0021Replacement o-ring, (1) EPDM$9.00
1228-0021Replacement o-ring, (1) FFPM$205.00
3-1500.6632540 Hot-tap installation tool$571.00
3-2540.320Rotor kit, 2540 sensor, PEEK bearing (old version)$85.00
3-2540.321Rotor kit, 2540 sensor, tungsten carbide pin (new version, 1/1/2000)$120.00
3-2540.322SS pin and rotor Rotor Kit$137.00
3-2541.260-1Replacement electronics module, 2540 sensor, standard installation$343.00
3-2541.260-2Replacement electronics module, 2540 sensor, hot-tap installation$426.00
5523-02222-conductor cable with shield, 22AWG, per foot$3.00
P31934Conduit cap$17.00
P51589Conduit adapter kit$65.00
P52503Replacement bearing, 525 sensor, carbon fiber reinforced PTFE$10.00
P52504-3Rotor Pin, Tungsten Carbide$17.00
P52504-4Rotor Pin, 316SS$13.00
P52527Replacement retainers, 525 and 2540 sensor, stainless steel$10.00




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