Insertion Flowmeters | McMaster-Carr

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	Pipe Size Pipe Size

1/2

3/4

1 1/2

	For Use With For Use With

	Body Material Body Material

Plastic

Brass

Stainless Steel

	Connection Style Connection Style


Threaded	Socket Weld

	Voltage Voltage

120V AC

240V AC

	Shape Shape


Straight	90° Elbow

	Industry Designation Industry Designation

SPDT

DPDT

	Connection Type Connection Type

	Pipe

	Maximum Pressure Maximum Pressure

160 psi @ 70° F

1,000 psi @ 70° F

2000 psi @ 70° F

	Mounting Location Mounting Location	Show

Insertion

	Mounting Location Mounting Location	Hide

	Maximum Temperature Maximum Temperature

200° to 224.9° F

225° to 249.9° F

250° F or greater

	Set Point Set Point

	Switch Starting Position Switch Starting Position

1 Off (Normally Open) or 1 On
(Normally Closed)

1 Off (Normally Open)

2 Off (Normally Open) or 2 On
(Normally Closed)

	Current Current

1 A @ 120 V AC

7.4 A @ 120 V AC

10 A @ 120 V AC

	Mounting Orientation Mounting Orientation

Horizontal

	Set Point Configuration Set Point Configuration

Nonadjustable

Adjustable

	For Pipe Size For Pipe Size

	Environment Environment

	Gender Gender

Male

	Specifications Met Specifications Met

CE Marked

CSA

	Number of Circuits Controlled Number of Circuits Controlled

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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14 Products

Compact Insertion Flow Switches for Water

With Socket-Weld Connection

With Threaded Connection

At half the height of standard insertion flow switches, these are often installed in tees or pipe outlets in low-clearance areas. They’re installed in tees or pipe outlets to detect the flow rate of liquid in contact with the sensing paddle. They activate or deactivate equipment when the flow rate reaches your set point. Switches are single pole, double throw (SPDT) and can be installed to turn one circuit from “off” to “on” (normally open). The flow rate varies based on the pipe size and the paddle length.

Maximum flow rate is how much water can temporarily flow through your pipe without damaging the switch.

Switches with a socket-weld connection are for use with unthreaded male pipe. Those with a threaded connection are for use with NPT female pipe.

Switches with a trimmable paddle can be cut to fit a range of pipe sizes. Those with a 301 stainless steel paddle can be used with higher maximum flow rates than switches with a Noryl plastic paddle.

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

Noryl Plastic Body
Pipe Size	Thread Type	Gender	For Pipe Size	Set Point, gpm	Set Point Adjustment Method	Paddle Material	Max. Flow Rate, gpm	Max. Pressure	Temp. Range, °F	Voltage	Current	Body Ht.	Environmental Rating		Each
Socket-Weld Connection
1/2	__	__	1/2	0.97 to 1.03	__	Noryl Plastic	7.9	160 psi @ 70 ° F	-13° to 212°	120V AC/ 240V AC	1 A @ 120 V AC	2 1/2"	IP65	00000000	0000000
3/4	__	__	3/4	1.87 to 1.94	__	Noryl Plastic	21	160 psi @ 70 ° F	-13° to 212°	120V AC/ 240V AC	1 A @ 120 V AC	2 1/2"	IP65	00000000	000000
3/4	__	__	1 1/2 to 3	8 to 23	Trimmable Paddles	301 Stainless Steel	650	160 psi @ 70 ° F	-13° to 212°	120V AC/ 240V AC	1 A @ 120 V AC	2 1/2"	IP65	00000000	000000
3/4	__	__	1 1/2 to 3	8 to 23	Trimmable Paddles	Noryl Plastic	390	160 psi @ 70 ° F	-13° to 212°	120V AC/ 240V AC	1 A @ 120 V AC	2 1/2"	IP65	0000000	000000
1	__	__	1	2.4 to 2.7	__	Noryl Plastic	40	160 psi @ 70 ° F	-13° to 212°	120V AC/ 240V AC	1 A @ 120 V AC	2 1/2"	IP65	00000000	000000
Threaded Connection
1/2	NPT	Male	1 1/2 to 8	4 to 240	Trimmable Paddles	301 Stainless Steel	650	160 psi @ 70 ° F	-13° to 212°	120V AC/ 240V AC	1 A @ 120 V AC	2 1/2"	IP65	00000000	000000
1/2	NPT	Male	1 1/2 to 8	4 to 240	Trimmable Paddles	Noryl Plastic	1,100	160 psi @ 70 ° F	-13° to 212°	120V AC/ 240V AC	1 A @ 120 V AC	2 1/2"	IP65	0000000	000000

Insertion Flow Switches for Water

Install these switches in tees or pipe outlets to detect the flow rate of liquid in contact with the sensing paddle. They activate or deactivate equipment when the flow rate reaches your set point. 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). They come with four sensing paddles that can be trimmed to fit a range of pipe sizes. The flow rate varies based on the pipe size and paddle used.

Switch with a 316 stainless steel body is more corrosion resistant than switches with a brass body.

Switch with an enclosure that meets NEMA 4X provides protection from dirt, washdowns, and corrosive liquids.

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

Brass Body
Pipe Size	Thread Type	Gender	For Pipe Size	Set Point, gpm	Max. Pressure	Temp. Range, °F	Voltage	Current	Body Ht.	Environmental Rating	Specifications Met		Each
1	NPT	Male	1 to 6	5 to 245	160 psi @ 70° F	33° to 225°	120V AC/ 240V AC	7.4 A @ 120 V AC	5"	NEMA 4X	C-UL Listed, UL Recognized Component	000000	0000000
1	NPT	Male	1 to 6	6 to 166	160 psi @ 70° F	33° to 300°	120V AC/ 240V AC	7.4 A @ 120 V AC	5"	__	C-UL Listed, UL Listed	000000	000000
316 Stainless Steel Body
1	NPT	Male	1 to 6	6 to 166	160 psi @ 70° F	33° to 300°	120V AC/ 240V AC	7.4 A @ 120 V AC	5"	__	C-UL Listed, UL Listed	000000	000000

Hazardous Location Insertion Flow Switches for Water, Oil, Air, and Inert Gas

For installation in environments with flammable gases and combustible dust, these flow switches are UL listed for hazardous locations. They meet NEC Class I, Divisions 1 and 2, Groups C and D; and NEC Class II, Divisions 1 and 2, Groups E, F, and G. They’re installed in tees or pipe outlets to detect the flow rate of liquid in contact with the sensing paddle. Switches activate or deactivate equipment when the flow rate reaches your set point. All come with five sensing paddles that can be trimmed to fit a range of pipe sizes. The flow rate varies based on the pipe size and paddle used.

SPDT switches control one circuit. They can be installed to turn the circuit from “off” to “on” (normally open) or from “on” to “off” (normally closed).

DPDT switches control two circuits. They can be installed to turn both circuits from “off” to “on” (normally open) or from “on” to “off” (normally closed).

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.

				Set Point						Conduit
Pipe Size	Thread Type	Gender	For Pipe Size	For Water and Oil, gpm	For Air and Inert Gas, scfm	Max. Pressure	Temp. Range, °F	Voltage	Current	Trade Size	Thread Type	Gender	Body Ht.		Each
SPDT
Brass Body
1 1/2	NPT	Male	1 1/2 to 20	3 to 2,400	17 to 10,000	1000 psi @ 70° F	-4° to 275°	120V AC 240V AC	10 A @ 120 V AC	3/4	NPT	Female	8"	00000000	0000000
316 Stainless Steel Body
1 1/2	NPT	Male	1 1/2 to 20	3 to 2,400	17 to 10,000	2000 psi @ 70° F	-4° to 275°	120V AC 240V AC	10 A @ 120 V AC	3/4	NPT	Female	8"	00000000	000000
DPDT
Brass Body
1 1/2	NPT	Male	1 1/2 to 20	3 to 2,400	17 to 10,000	1000 psi @ 70° F	-4° to 275°	120V AC 240V AC	10 A @ 120 V AC	3/4	NPT	Female	8"	00000000	000000
316 Stainless Steel Body
1 1/2	NPT	Male	1 1/2 to 20	3 to 2,400	17 to 10,000	2000 psi @ 70° F	-4° to 275°	120V AC 240V AC	10 A @ 120 V AC	3/4	NPT	Female	8"	00000000	000000