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Flow Switch With Compact Relay Controller

$673.95

Item# FST-221-R

In stock

Lead Time (If not in stock): 8 weeks
Flow Switch With Compact Relay Controller FST-221-R FST-221-R
  • Offered in Liquid and Gas Configurations
  • All-Plastic Construction with PP or PVDF Materials for Corrosive Environments
  • Invert Switch Provides Simple NO or NC Relay Operation
  • LED Indicators for Fluid, Relay and Power Status
  • 0-60 Second Time Delay Dampens Out Relay Chatter
  • Fail-Safe Controller Provides Direct Actuation of Pumps, Valves and Blowers

FST-221-R Model Options

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Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination.

Process Connection Size
Media Type
Velocity Range
Accuracy
Max Operating Pressure
Max Process Temperature
Process Connection Type
Wetted Materials
Switch Rating and Type
Supply Power
Wire Length


This switch package offers a complete solution for flow or no-flow switching in pipes or ducting up to 0.3 m (12'). The compact relay controller reliably actuates valves, pumps, or blowers rated up to 1/2 hp. Common applications include low-flow pump or process protection. To complete the instrumentation package, simply select the switch configuration in accordance with the liquid or gas used in your application.

L
I
Q
U
I
D
Variable Yes
Clean Y
Slurry Y
Bubbles
Coating
Non-Coating Y
Low Viscosity Y
Med. Viscosity Y
High Viscosity
Low Temperature Y
Med. Temperature
High Temperature
Δ Temperature Y
Low Velocity Y
High Velocity
G
A
S
Variable Yes
Coating
Non-Coating Y
Low Temperature Y
Med. Temperature Y
High Temperature
Δ Temperature
Low Velocity Y
High Velocity


SPECIFICATIONS
RELAY CONTROLLER
Supply Voltage: 120/240 Vac 50/60 Hz
Consumption: 0.25 A
Relay Type: (1) SPDT
Relay Current: 10 A, 250 Vac, 1/2 hp
Relay Mode: NO or NC selectable
Time Delay: 0 to 60 s
Temp Range: -40 to 70°C (-40 to 158°F)
Enclosure Rating: NEMA 4X (IP66)
Enclosure Material: Polypropylene (UL 94VO)
Enclosure Rotation: 300° swivel base
Conduit Connection: 1/2 NPT
SENSOR
Range: 0.04 to 3 ft/s (liquids)
Accuracy: ±5% of setpoint at constant temperature and flow rate
Response Time: 10 s (approx.)
Setpoint Drift with Fluid Temperature: 0.5%/°C
Fluid Temperature: 60°C (140°F)
Max Fluid Pressure:
   PP or PVDF: 150 psi @ 25°C (77°F) derated @ 1.7 psi/°C above 25°C (77°F)
Process Connection: 3/4 MNPT
Dimensions: 208 L x 71 mm Dia (8.2 x 2.8')
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