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The FSW-420/30 Series
monitors your relative flow
rate for applications where the
actual flow rate is not important.
The FSW-420/30 series is easy to
install and use. Just put it into the
pipe and it’s ready to go. The
FSW-420/30 series sets your
present flow-rate at 100% at power
up. Relative flow rate is indicated
by the 7 LED lights. When the flow
rate drops to 50%, an alarm goes
off. If you prefer, you can adjust
the alarm point to fit your needs.
A green output indicating LED is
Specifications Media: Liquids Low Flow Set Point: Pre-set to 50% (field adjustable) Operating Temperature: -20 to 80°C Response Time: 25 seconds (typical) Repeatability: 1% Hysteresis: 10% of set-point value typical Range: FSW-420 Series: 0 to 150 cm/sec FSW-431: 0 to 2.25 L/min FSW-432: 0 to 5.1 L/min FSW-433: 0 to 14.1 L/min Operating Pressure: 30 Bar Protection Class: IP67 Housing: Anodised aluminium Sensor Material: 303 stainless steel Tube Housing (FSW-430 series): Polyacetal Mounting (FSW-420 Series): ½ NPT Connection Tube OD: FSW-431: 6 mm FSW-432: 8 mm FSW-433: 12 mm Electrical Connection: M12 male socket 4-pin, 2 m cable with M12 connector and pigtail leads Supply Voltage: 20 to 30 Vdc (short circuit protected) Switching Current: <200 mA Power Consumption: 6 W max Initial Operation: 15 seconds Output: PNP normally open (closed with flow), optional normally closed (open with flow)
Note: Comes complete with operator's manual and pre-wired 2m cable.
Ordering Example: (1) FSW-431 Flow switch and mating connector, 6 mm tube, GBP 302.00