Thermal Flow Switches

FSW-420 & FSW-430 Series

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^$ 450.00 FSW-433

•	Automatic Scaling and Set-Point
•	No Moving Parts
•	Pushbutton Re-Scaling if Needed
•	Easy to Install
•	Normally Open Standard, Normally Closed Available
View related products - Variable Area Flowmeters, Rotameters & Switches

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 also included.

SPECIFICATIONS
Media: Liquids
Low Flow Set Point: Pre-set to 50% (field adjustable)
Operating Temperature: -20 to 80°C (-4 to 176°F)
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 (450 psi)
Protection Class: NEMA 6 (IP67)
Housing: Anodized aluminum
Sensor Material: 303 stainless steel
Tube Housing (FSW-430 series): Polyacetal
Mounting (FSW-420 Series): ½ NPT
Connection Tube OD:
    FSW-431: 6 mm (0.24")
    FSW-432: 8 mm (0.31")
    FSW-433: 12 mm (0.47")
Electrical Connection: M12 male socket 4-pin, 2 m (7') 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)

To Order (Specify Model Number)

What Other People Bought: When you see this icon, click on it to expand a list of products that other people have bought when they purchased this model.

Part Number	Availability	Price	Description	Qty.

Normally Open Valves

FSW-421		$325.00	Insertion flow switch, 12.5 mm (0.5") insertion length	qty.

FSW-422		$350.00	Insertion flow switch 50.5 mm (2") insertion length	qty.

FSW-431		$450.00	In-line flow switch 6 mm (0.24") tube	qty.

FSW-432		$450.00	In-line flow switch 8 mm (0.31") tube	qty.

FSW-433		$450.00	In-line flow switch 12 mm (0.47") tube	qty.


Normally Closed Valves

FSW-421-NC		$325.00	Insertion flow switch, 12.5 mm (0.5") insertion length, normally closed	qty.

FSW-422-NC		$350.00	Insertion flow switch, extended length, normally closed	qty.

FSW-431-NC	4 Weeks	$450.00	In-line flow switch 6 mm (0.24") tube, normally closed	qty.

FSW-432-NC	4 Weeks	$450.00	In-line flow switch 8 mm (0.31") tube, normally closed	qty.

FSW-433-NC	4 Weeks	$450.00	In-line flow switch 12 mm (0.47") tube, normally closed	qty.


Accessories

FSW-400-CABLE-2M	3 Weeks	$25.00	FSW-400 Series connection cable 2m (7')	qty.

FSW-400-CABLE-4M		$35.00	FSW-400 Series connection cable 4m (13')	qty.

70A-1		$20.00	audible alarm	qty.

PSU-93		$40.00	power supply	qty.

† All dollar amounts on this site are shown in US currency.

Note: Comes complete with operator's manual and pre-wired 2m(6/5') cable.

Standard valves are Normally Open. For optional Normally Closed valves, add "-NC" to model number, no additional charge.

Ordering Example: (1) FSW-431 Flow switch and mating connector, 6 mm (0.24"), $450, plus (1) PSU-93 Power supply , $40, plus (1) 70A-1 Audible alarm, $20, $450 + 40 + 20 = $510.00

Keywords:Thermal Flow Switches, thermal flow measurement