Skip to main content Skip to navigation

Call us at 1-888-826-6342

Call us at 1-888-826-6342.

Liquid Micro-Flow Switches

Item# FSW531

Liquid Micro-Flow Switches FSW531 FSW531
  • Economical
  • Extremely Low Flow
  • Pelton-Type Microturbine
  • Plastic or Metal Housing

  • Maximum Operating Temperature 55 {C} (131 {F})
  • Maximum Pressure Acetal: 6.9 bar (100 psig)
  • Maximum Switching Voltage 24 VDC
  • Minimum Operating Temperature 5 {C} (41 {F})
  • Relay Current 250 mA
The FSW530 Series flow switches are capable of detecting extremely low liquid flow rates from 13 mL/minute up to 10 L/minute with a full scale switch accuracy of ±1.0% or better! A wide variety of fluids may be measured. Repeatable results are achieved using a patented pelton-type microturbine wheel. This proven design has been providing precision results since 1988 and has developed a well deserved reputation for continuous operational service for many years without failure. Because of the compact size and economical cost of these products, the FSW530 models are suitable for a wide variety of industrial, commercial, laboratory and OEM applications. Some sample applications include high/low alarms for hydrocarbon fluids, fuels, light oils, solvents, coolant, pesticides, mild acids, alkalis, and de-ionized water. Either plastic or metal construction may be selected.

Accuracy: ±1% full scale
Repeatability: ±0.5% full scale
Recommended Liquids: Low viscosity (<10 cS), translucent or transparent chemically compatible with a minimal amount of entrained air
Fittings: Acetal, stainless steel (optional)
O-rings: FKM, EPDM (optional)
Power: 12 to 24 Vdc @ 75 mA
Maximum Pressure:
    Acetal: 6.9 bar (100 psig)
    Stainless Steel: 34.5 bar (500 psig)
Enclosure: NEMA 1 (IP10)
Recommended Filtration: 25 microns or less
Relay: FET switch 24 Vdc, 250 mA
Response Time: <1 second at 97% of final value
Switching Hysteresis: ±2.0% full scale
Dimensions: 60 x 55 x 90 mm (2.4 x 2.2 x 3.5")
    Operation: 5 to 55°C (41 to 131°F)
    Storage: 0 to 70°C (32 to 158°F)
Temperature Sensitivity: ±0.2% full scale or less per °C
Wetted Materials: Ryton or 316 SS, epoxy, glass, sapphire and FKM or EPDM (optional)
loading all models
loading all reviews
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getReviews, 4ms
  • bvseo-msg: The resource to the URL or file is currently unavailable.;
loading all QA
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getContent, 23ms
  • bvseo-msg: The resource to the URL or file is currently unavailable.;
Save Configuration