Signet 515 Rotor-X Paddlewheel Flow Sensor

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Paddlewheel Flow Sensor Signet 515 Rotor-X

Simple to install with time-honored reliable performance, Signet Model 515 Rotor-X Paddlewheel Flow Sensors are highly repeatable, rugged sensors that offer exceptional value with little or no maintenance. The wide dynamic flow range of 0.3 to 6 m/s (1 to 20 ft/s) allows the sensor to measure liquid flow rates in full pipes and can be used in low-pressure systems.

Fields of Application:

  • Pure Water Production
  • Filtration Systems
  • Chemical Production
  • Liquid Delivery Systems
  • Pump Protection
  • Scrubber Systems
  • Water Monitoring
  • Not suitable for gases
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  • Wide turndown ratio of 20:1
  • Highly repeatable output
  • Simple, economical design
  • Installs into pipe sizes DN15 to DN900
  • Self-powered/no external power required
  • Test certificate included for -X0, -X1
  • Chemically-resistant materials


Operating Range0.3 to 6 m/s1 to 20 ft/s
Pipe Size RangeDN15 to DN900½ to 36 in.
  Linearity±1% of max. range @ 25 °C (77 °F)
Repeatability±0.5% of max. range @ 25 °C (77 °F)
Min. Reynolds Number Required4500
Wetted Materials
Sensor BodyGlass-fi lled PP (black) or PVDF (natural)
O-ringsFKM (std), optional EPR (EPDM) or FFKM
Rotor PinTitanium, Hastelloy-C or PVDF; optional Ceramic, Tantalum, or Stainless Steel
RotorBlack PVDF or Natural PVDF; optional ETFE, with or without carbon fi ber reinforced PTFE sleeve
Frequency19.7 Hz per m/s nominal6 Hz per ft/s sinusoidal
Amplitude3.3 V p/p per m/s nominal1 V p/p per ft/s
Source Impedance8 KΩ
Cable Type2-conductor twisted pair with shield, 22 AWG
Cable Length7.6 m (25 ft) can be extended up to 60 m (200 ft) maximum
Max. Temperature/Pressure Rating – Standard and Integral Sensor
PP12.5 bar @ 20 °C181 psi @ 68 °F
 1.7 bar @ 90 °C25 psi @ 194 °F
PVDF14 bar @ 20 °C203 psi @ 68 °F
 1.4 bar @ 100 °C20 psi @ 212 °F
Operating Temperature
PP-18 °C to 90 °C0°F to 194 °F
PVDF-18 °C to 100 °C0 °F to 212 °F
Max. Temperature/Pressure Rating – Wet-Tap Sensor
PP7 bar @ 20 °C102 psi @ 68 °F
 1.4 bar @ 66 °C20 psi @ 150 °F
Operating Temperature  
   -18 °C to 66 °C0 °F to 150 °F
Max. Wet-Tap Sensor Removal Rating
 M 1.7 bar @ 22 °C25 psi @ 72 °F
Standards and Approvals
 RoHS compliant, China RoHS
 Lloyd’s Register Type Approval, NSF (P51530-PX version only)
 Manufactured under ISO 9001 for Quality and ISO 14001 for Environmental Management and OHSAS 18001 for Occupational Health and Safety

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