Rotary Flow Switches | McMaster-Carr

	Pipe Size Pipe Size

1/4

1/2

3/4

	Body Material Body Material

Plastic

Brass

Stainless Steel

	Maximum Flow Maximum Flow

	Current Current

0.008 A @ 24 V DC

0.3 A @ 120 V AC

	Maximum Pressure Maximum Pressure

100 psi @ 70° F

200 psi @ 70° F

	Mounting Orientation Mounting Orientation

Horizontal

Vertical

	Maximum Temperature Maximum Temperature

180° F

212° F

	Minimum Flow Minimum Flow

	Direction of Flow Direction of Flow

	Electrical Connection Type Electrical Connection Type

Hardwire

Wire Leads

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	End-to-End Length End-to-End Length

3 1/16"

3 15/16"

	Specifications Met Specifications Met

CE Marked

	Minimum Set Point Minimum Set Point

	Maximum Set Point Maximum Set Point

17 Products

Flow Transmitters for Water

Send flow-rate readings to data recorders, loggers, and displays.

Transmitters with a 316 stainless steel body are more corrosion resistant than transmitters with a brass or polypropylene body.

								Output
Pipe Connections	End-to-End Lg.	Flow Range, gpm	Accuracy	Max. Pressure	Temp. Range, °F	Seal Material	Mounting Orientation	Signal Connection	Signal, mA	Current	Wire Lead Lg.		Each
Polypropylene Plastic Body
Gallons per Minute
1/4 NPT Female	3 1/16"	0.1 to 5	±7%	100 psi @ 70° F	33° to 180°	Fluoroelastomer Rubber	Horizontal, Vertical	Wire Leads	70	0.008 A @ 24 V DC	24"	0000000	0000000
1/2 NPT Female	3 1/16"	1.5 to 20	±15%	100 psi @ 70° F	33° to 180°	Fluoroelastomer Rubber	Horizontal, Vertical	Wire Leads	70	0.008 A @ 24 V DC	24"	0000000	000000
Brass Body
Gallons per Minute
1/4 NPT Female	3"	0.1 to 5	±7%	200 psi @ 70° F	33° to 212°	Fluoroelastomer Rubber	Horizontal, Vertical	Wire Leads	70	0.008 A @ 24 V DC	24"	0000000	000000
1/2 NPT Female	3"	1.5 to 20	±15%	200 psi @ 70° F	33° to 212°	Fluoroelastomer Rubber	Horizontal, Vertical	Wire Leads	70	0.008 A @ 24 V DC	24"	0000000	000000
1 NPT Female	3 15/16"	8 to 60	±15%	200 psi @ 70° F	33° to 212°	Fluoroelastomer Rubber	Horizontal, Vertical	Wire Leads	70	0.008 A @ 24 V DC	24"	0000000	000000
316 Stainless Steel Body
Gallons per Minute
1/2 NPT Female	3"	1.5 to 20	±15%	200 psi @ 70° F	33° to 212°	Fluoroelastomer Rubber	Horizontal, Vertical	Wire Leads	70	0.008 A @ 24 V DC	24"	0000000	000000
3/4 NPT Female	3 15/16"	5 to 30	±15%	200 psi @ 70° F	33° to 212°	Fluoroelastomer Rubber	Horizontal, Vertical	Wire Leads	70	0.008 A @ 24 V DC	24"	0000000	000000
1 NPT Female	3 15/16"	8 to 60	±15%	200 psi @ 70° F	33° to 212°	Fluoroelastomer Rubber	Horizontal, Vertical	Wire Leads	70	0.008 A @ 24 V DC	24"	0000000	000000

Flow Switches with Indicator for Water

For flow monitoring at a glance, these switches have a plastic window with a rotor indicator that spins when flow is present. They activate or deactivate equipment when the flow rate reaches your set point. All have an adjustment screw for altering the set point to suit your application. Switches are single pole, double throw (SPDT) and can be installed to turn one circuit from "off" to "on" (normally open) or from "on" to "off" (normally closed).

Switches with a polypropylene body are lighter than sights with a metal body.

Switches with a 316 stainless steel body are more corrosion resistant than switches with a brass body.

For technical drawings and 3-D models, click on a part number.

Polypropylene Plastic Body
Pipe Size	Thread Type	Gender	Set Point, gpm	Max. Pressure	Temp. Range, °F	Voltage	Current	End-to-End Lg.		Each
1/4	NPT	Female	0.1 to 5	100 psi @ 70° F	33° to 180°	120V AC	0.3 A @ 120 V AC	3 1/16"	0000000	0000000
1/2	NPT	Female	1.5 to 20	100 psi @ 70° F	33° to 180°	120V AC	0.3 A @ 120 V AC	3 1/16"	0000000	000000
Brass Body
1/4	NPT	Female	0.1 to 5	200 psi @ 70° F	33° to 212°	120V AC	0.3 A @ 120 V AC	3"	0000000	000000
1/2	NPT	Female	1.5 to 20	200 psi @ 70° F	33° to 212°	120V AC	0.3 A @ 120 V AC	3"	0000000	000000
3/4	NPT	Female	5 to 30	200 psi @ 70° F	33° to 212°	120V AC	0.3 A @ 120 V AC	3 15/16"	0000000	000000
1	NPT	Female	8 to 60	200 psi @ 70° F	33° to 212°	120V AC	0.3 A @ 120 V AC	3 15/16"	0000000	000000
316 Stainless Steel Body
1/2	NPT	Female	1.5 to 20	200 psi @ 70° F	33° to 212°	120V AC	0.3 A @ 120 V AC	3"	0000000	000000
3/4	NPT	Female	5 to 30	200 psi @ 70° F	33° to 212°	120V AC	0.3 A @ 120 V AC	3 15/16"	0000000	000000
1	NPT	Female	8 to 60	200 psi @ 70° F	33° to 212°	120V AC	0.3 A @ 120 V AC	3 15/16"	0000000	000000