2 Pipe Size Flow Switches

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Maximum Flow Rate

1,000 gpm to 1,999 gpm

2,000 gpm or greater

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EAR99

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29 Products

Insertion-Mount Flow Switches


Socket Connection with IP65 Rating	Threaded Connection with IP65 Rating

Threaded Connection with NEMA 4X Rating	Threaded Connection

Avoid complicated inline installation—these flow switches insert into a tee or pipe outlet, so you don’t need to disassemble your pipeline. They have a paddle that’s pushed as your liquid moves through to determine flow. When the paddle reaches a set position determined by the set point, it activates or deactivates equipment. They are single pole, double throw (SPDT) and can either turn one device from off to on (normally open) or on to off (normally closed). They should be mounted vertically into a large-diameter horizontal pipeline, so liquid pushes the paddle.

These flow switches are calibrated with water. You can use them with other liquids, but they may not measure accurately if the liquid’s viscosity differs from water.

Choose a fitting material that is compatible with the liquid you're running through your line.

316 Stainless Steel Body and Brass Body—Switches with a brass or 316 stainless steel body have multiple paddles you can choose between to get you closest to your set point. For a higher set point, loosen the locking washers to remove the largest paddles. You can also trim the paddles to fine-tune your set point. The more you trim, the higher the set point.

Noryl Body—Switches with a Noryl body have a paddle that you trim to adjust the set point. The more you trim, the higher the set point.

Socket-Connect Fitting Connection—Socket-connect flow switches bond to an unthreaded PVC pipe tee or pipe outlet with PVC cement and primer (not included).

316 Stainless Steel Fitting and Brass Fitting—Brass and 316 stainless steel fittings resist impact better than Noryl fittings.

Noryl Fitting—Noryl fittings work with a wide range of chemicals.

IP65 Enclosure Rating—IP65 rated switches seal out dust and can be lightly rinsed.

NEMA 4X Enclosure Rating—NEMA 4X rated switches protect against dust, weather, and washdowns.

	Paddle Material	Max. Pressure @ Temp.	Temp. Range, ° F	Max. Switching Current @ Voltage	Body Ht.	Enclosure Rating	Specs. Met	Certification		Each
Noryl Body with 3/4 Socket-Connect Noryl Fittings







	Set-Point-Adjustment Trimmable Paddles

	1 1/2 2 3	7.7 to 19.3 10.3 to 21 16.5 to 52	110; 150; 390	Noryl	160 psi @ 70° F	-13 to 212	1 amp @ 230V AC 1 amp @ 48V DC	2 1/2"	IP65	UL 508	—	0000000	0000000


	1 1/2 2 3	7.9 to 15 10 to 22 18 to 50	144; 240; 650	301 Stainless Steel	160 psi @ 70° F	-13 to 212	1 amp @ 230V AC 1 amp @ 48V DC	2 1/2"	IP65	UL 508	—	00000000	000000


	Noryl Body with 1/2 NPT Male Threaded Brass Fittings







					Set-Point-Adjustment Trimmable Paddles

					1 1/2 2 3 4 8	7.7 to 19.3 10.3 to 21 16.5 to 52 25.5 to 68 126 to 240	110; 150; 390; 420; 1,100	Noryl	160 psi @ 70° F	-13 to 212	1 amp @ 230V AC 1 amp @ 48V DC	2 1/2"	IP65	UL 508	—	0000000	000000


					1 1/2 2 3 4 8	7.9 to 15 10 to 22 18 to 50 25 to 66 114 to 176	144; 240; 650; 800; 1,900	301 Stainless Steel	160 psi @ 70° F	-13 to 212	1 amp @ 230V AC 1 amp @ 48V DC	2 1/2"	IP65	UL 508	—	00000000	000000


					Brass Body with 1 NPT Male Threaded Brass Fittings







									Set-Point-Adjustment Removable Layered Paddles, Set-Point-Adjustment Trimmable Paddles

									1 2 4 6	4.9 to 17.6 13.7 to 56.4 35.3 to 118 60.3 to 245	27; 105; 397; 900	304 Stainless Steel	160 psi @ 70° F	33 to 225	3.7 amp @ 240V AC 7.4 amp @ 120V AC	5"	NEMA 4X	—	C-UL Listed UL Recognized Component	000000	000000


									1 2 4 6	6 to 10.2 18.8 to 32.8 39.7 to 73.5 79.2 to 166	27; 105; 397; 900	304 Stainless Steel	160 psi @ 70° F	33 to 300	3.7 amp @ 240V AC 7.4 amp @ 120V AC	5"	—	—	C-UL Listed UL Listed	000000	000000


									316 Stainless Steel Body with 1 NPT Male Threaded 316 Stainless Steel Fittings







													Set-Point-Adjustment Removable Layered Paddles, Set-Point-Adjustment Trimmable Paddles

													1 2 4 6	6 to 10.2 18.8 to 32.8 39.7 to 73.5 79.2 to 166	27; 105; 397; 900	304 Stainless Steel	160 psi @ 70° F	33 to 300	3.7 amp @ 240V AC 7.4 amp @ 120V AC	5"	—	—	C-UL Listed UL Listed	000000	000000

Fixed-Set-Point Flow Switches

Style C

Since they come factory set to a specific set point, these switches are easier to install than adjustable flow switches. As flowing liquid pushes an internal piston, the switch reads the position of the piston to measure the flow. When the piston passes the set point, the switch actuates. They’re accurate in any mounting position.

These switches are calibrated with and measure water accurately. They can also be used with other liquids by applying your liquid’s specific-gravity conversion factor to calculate the new set point.

Choose a fitting material that is compatible with the liquid you intend to run through your line.

Straight

Style C

316 Stainless Steel Fitting and Bronze Fitting—Bronze and 316 stainless steel fittings resist impact better than plastic fittings.

SPDT—SPDT (single pole, double throw) switches can either turn one device from off to on (normally open) or from on to off (normally closed).

										Conduit
	Style	Pipe Size	Thread Type	Gender	Set Point, gpm	Approx. Difference Between Set Point and Reset Point, gpm	Max. Pressure @ Temp.	Temp. Range, ° F	Max. Switching Current @ Voltage	Trade Size	Thread Type	Gender	End-to-End Lg.	Mounting Position		Each
Bronze Body with Bronze Fittings







				SPDT

				C	2	NPT	Female	2	0.3	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	5 3/8"	Any Angle	00000000	0000000


				C	2	NPT	Female	5	0.75	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	5 3/8"	Any Angle	00000000	000000
				C	2	NPT	Female	50	7.5	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	5 3/8"	Any Angle	00000000	000000


				316 Stainless Steel Body with 316 Stainless Steel Fittings







								SPDT

								C	2	NPT	Female	2	0.3	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	5 3/8"	Any Angle	00000000	00000000


								C	2	NPT	Female	5	0.75	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	5 3/8"	Any Angle	00000000	00000000
								C	2	NPT	Female	50	7.5	400 psi @ 70° F	-20 to 300	400 mA @ 30V AC 170 mA @ 120V AC 80 mA @ 240V AC 300 mA @ 30V DC 130 mA @ 120V DC 60 mA @ 240V DC	1/2	NPT	Male	5 3/8"	Any Angle	00000000	00000000

Hazardous-Location Insertion-Mount Flow Switches

Safely activate and deactivate equipment in environments with flammable gases and combustible dust when your flow rate reaches a set point. They are UL listed and CSA certified for use in hazardous locations. These switches save you from disassembling your pipeline because you insert them into pipe tees or pipe outlets instead of mounting them inline. They actuate when your system’s liquid pushes the paddle into a set position. To change your set point, the paddle has multiple layers that you can remove. For the lowest set point, use the largest paddle that will fit your pipe. To increase your set point, loosen the locking washers and remove paddles. You can trim the paddles to fine-tune your set point. The smaller the paddle, the higher the setpoint.

They should be mounted vertically into a horizontal pipeline, so liquid pushes the paddle.

These switches are calibrated with water and air. They can also be used with other liquids and gases but may not measure accurately if their viscosity is significantly different.

SPDT—SPDT (singe pole, double throw) switches can turn one device from off to on (normally open) or from on to off (normally closed).

DPDT—DPDT (double pole, double throw) switches can either turn two devices from off to on (normally open) or on to off (normally closed).

					Flow Set Point Range		Max. Flow Rate					Conduit
	Pipe Size	Thread Type	Gender	For Pipe Size	For Water and Oil	For Air and Inert Gas	For Water and Oil	For Air and Inert Gas	Max. Pressure @ Temp.	Temp. Range, ° F	Max. Switching Current @ Voltage	Trade Size	Thread Type	Gender	Body Ht.		Each
SPDT







				Brass Body

				1 1/2	NPT	Male	1 1/2 2 4 12 20	3 gpm to 7 gpm 4 gpm to 15 gpm 12 gpm to 95 gpm 140 gpm to 900 gpm 400 gpm to 2,400 gpm	17 scfm to 32 scfm 13 scfm to 65 scfm 50 scfm to 400 scfm 800 scfm to 3,450 scfm 2,850 scfm to 10,000 scfm	55 gpm 97 gpm 391 gpm 3,525 gpm 9,792 gpm	Not Rated	1,000 psi @ 70° F	-4 to 275	5 amp @ 125V AC 5 amp @ 250V AC	3/4	NPT	Female	8"	00000000	0000000




						316 Stainless Steel Body

						1 1/2	NPT	Male	1 1/2 2 4 12 20	3 gpm to 7 gpm 4 gpm to 15 gpm 12 gpm to 95 gpm 140 gpm to 900 gpm 400 gpm to 2,400 gpm	17 scfm to 32 scfm 13 scfm to 65 scfm 50 scfm to 400 scfm 800 scfm to 3,450 scfm 2,850 scfm to 10,000 scfm	55 gpm 97 gpm 391 gpm 3,525 gpm 9,792 gpm	Not Rated	2,000 psi @ 70° F	-4 to 275	5 amp @ 125V AC 5 amp @ 250V AC	3/4	NPT	Female	8"	00000000	00000000


						DPDT







										Brass Body

										1 1/2	NPT	Male	1 1/2 2 4 12 20	3 gpm to 7 gpm 4 gpm to 15 gpm 12 gpm to 95 gpm 140 gpm to 900 gpm 400 gpm to 2,400 gpm	17 scfm to 32 scfm 13 scfm to 65 scfm 50 scfm to 400 scfm 800 scfm to 3,450 scfm 2,850 scfm to 10,000 scfm	55 gpm 97 gpm 391 gpm 3,525 gpm 9,792 gpm	Not Rated	1,000 psi @ 70° F	-4 to 275	5 amp @ 125V AC 5 amp @ 250V AC	3/4	NPT	Female	8"	00000000	000000




												316 Stainless Steel Body

												1 1/2	NPT	Male	1 1/2 2 4 12 20	3 gpm to 7 gpm 4 gpm to 15 gpm 12 gpm to 95 gpm 140 gpm to 900 gpm 400 gpm to 2,400 gpm	17 scfm to 32 scfm 13 scfm to 65 scfm 50 scfm to 400 scfm 800 scfm to 3,450 scfm 2,850 scfm to 10,000 scfm	55 gpm 97 gpm 391 gpm 3,525 gpm 9,792 gpm	Not Rated	2,000 psi @ 70° F	-4 to 275	5 amp @ 125V AC 5 amp @ 250V AC	3/4	NPT	Female	8"	00000000	00000000

Contactless Flow Transmitters

Using ultrasonic waves, these transmitters measure the flow rate of your liquid from outside your pipe. They're a good choice for applications where you need to retrofit your system or avoid liquid coming into contact with the transmitter. Also known as transducers, these transmitters convert measurements to an electrical pulse that can be interpreted by receiving devices, such as remote displays and programmable logic controllers (PLCs). The pulse outputs match the input voltage of the transmitter. The higher the flow, the more pulses they send. For your receiving device to interpret the signal, you will need to calibrate it for the measurement range and output signal of the transmitter. They only give accurate readings within the rated measurement range. Configure them for either a 4-20mA or digital pulse output when installing.

A digital display makes it easy to check flow rate and configure settings. Clamp these transmitters onto your pipe with the included mounting hardware and gel pads. They measure flow no matter the mounting orientation.

These transmitters are calibrated with water but can be used with other liquids and will generally measure accurately, even if they differ in viscosity and density. You can recalibrate them in the field for accurate readings on pipe and operating conditions.

			Flow Range for Pipe Size, gpm						Input Voltage
	Flow Measurement Type	For Pipe Size	3/4	2	4	End-to-End Lg.	Accuracy	Temp. Range, ° F	Min., V DC	Max.	Mounting Position	Field Recalibratable	Enclosure Rating		Each
One Digital Pulse Output and One 4-20 mA Analog Transmitter Output—Wire Lead Connection







				Polycarbonate Body

				Ultrasonic	3/4 to 4	0 to 45	0 to 320	0 to 1,285	9 3/4"	±3%	32 to 185	12	24V AC/24V DC	Any Angle	Yes	IP54	0000000	000000000

Fixed-Set-Point Hazardous-Location Flow Switches

Safe to use where flammable gases and combustible dust may be present, these switches activate or deactivate when your flow reaches a factory-set level. All are UL listed for hazardous environments. Because their set point is fixed, they’re ready to go, making them easy to install. They actuate when your flowing liquid or gas pushes their paddle into a set position. These switches are single pole, double throw (SPDT) and can turn one device from off to on (normally open) or from on to off (normally closed). They must be mounted horizontally to function accurately.

These switches are calibrated with water and air. They can also be used with other liquids and gases but may not measure accurately if their viscosity is significantly different.

		Set Point						Conduit
	Pipe Connections	For Liquids, gpm	For Gas, scfm	Max. Pressure @ Temp.	Temp. Range, ° F	Voltage, V AC	Max. Switching Current @ Voltage	Trade Size	Thread Type	Gender	End-to-End Lg.	Enclosure Rating	Certification		Each
304 Stainless Steel Body with Threaded 304 Stainless Steel Fittings



		2 NPT Female	10	43	2,000 psi @ 70° F	-4 to 220	120/240	5 amp @ 120V AC	3/4	NPT	Male	4 3/4"	NEMA 4	UL Listed CE Marked	00000000	000000000


		Brass Body with Threaded Brass Fittings



				2 NPT Female	10	43	250 psi @ 70° F	-4 to 220	120/240	5 amp @ 120V AC	3/4	NPT	Male	3"	NEMA 4	UL Listed CE Marked	00000000	000000

Variable-Pressure Flow Switches

Accurate even in applications where pressure fluctuates regularly, these flow switches split flow into two paths and measure their difference in pressure drop to calculate the flow rate of liquid. They activate or deactivate equipment when the flow rate reaches your set point. Tighten or loosen the adjustment screw to choose your set point anywhere within the range. They measure accurately no matter their mounting position. All are single pole, double throw (SPDT) and can either turn one device from off to on (normally open) or on to off (normally closed). Rated NEMA 4X and IP66, they seal out dust and protect against washdowns and corrosion.

These switches are calibrated with water. They can also be used with other liquids but may not measure accurately if their viscosity is significantly different.

	Voltage	Max. Switching Current @ Voltage	Conduit Trade Size	End-to-End Lg.		Each
Bronze Body







	2 NPT Female

	5 to 40	400 psi @ 70° F	-30 to 212	120V AC/175V DC	180 mA @ 120V AC 250 mA @ 175V DC	1/2	3 3/16"	00000000	0000000


	15 to 100	400 psi @ 70° F	-30 to 212	120V AC/175V DC	180 mA @ 120V AC 250 mA @ 175V DC	1/2	3 3/16"	00000000	000000
	30 to 200	400 psi @ 70° F	-30 to 212	120V AC/175V DC	180 mA @ 120V AC 250 mA @ 175V DC	1/2	3 3/16"	00000000	000000

Build-Your-Own Flanged Pipe Flow Transmitters

Components Sold Separately (Pipe Flanges

Not Included)

Install these transmitters between two flanges in a flanged pipe system to measure flow rate and send the data to a remote display or programmable logic controller (PLC). For easy cleaning and maintenance, you can slide the transmitter out from between the flanges. A complete transmitter consists of a flow transmitter, display, and mounting hardware kit (all components sold separately). Flowing liquid turns the turbine in the transmitter, while the easy-to-read display counts the number of turns to measure and transmit the flow. The display also shows total and batch flow volumes. Use these transmitters with clean, low-viscosity liquids to avoid clogging or other damage to the internal parts. Mount them inline with your pipe system. They’re accurate in any mounting orientation.

Also known as transducers, these transmitters help you monitor status or control equipment by converting measurements to a digital pulse that can be interpreted by receiving devices. Each pulse is a spike of voltage. The higher the flow, the more pulses they send. For your receiving device to interpret the signal from the transmitter, you will need to calibrate it for the measurement range and output signal of the transmitter. Transmitters will only provide accurate readings within the rated measurement range.

The transmitters are calibrated with water but can be used with other liquids.

Flow Transmitters

					Flange
	Flow Measurement Type	Pipe Size	Flow Range, gpm	Bore Size	OD	Type	For Flange ANSI Class	End-to-End Lg.	Accuracy	Max. Pressure @ Temp.	Temp. Range, ° F	Mounting Position	Field Recalibratable	Pulse Frequency per Volume, pulse per gal.		Each
One Digital Pulse Output—2-Pin BNC Connection Plug







				316/316L Stainless Steel Body with 316/316L Stainless Steel Fitting

				Turbine	2	5 to 50	1"	3 5/8"	Round	150	2 1/2"	±1.0%	285 psi @ 70° F	-150 to 350	Any Angle	No	850	0000000	000000000


				Turbine	2	15 to 180	1 1/2"	3 5/8"	Round	150	2 1/2"	±1.0%	285 psi @ 70° F	-150 to 350	Any Angle	No	325	0000000	00000000

Flow Transmitter Repair Kits

For Pipe Size	For Bore Size	For Flange ANSI Class	Includes		Each
2	1"	150	6 Screws, 2 Rotor Supports, One Rotor Assembly, One K-Factor Tag	0000000	0000000
2	1 1/2"	150	6 Screws, 2 Rotor Supports, One Rotor Assembly, One K-Factor Tag	0000000	000000

Mounting Hardware Kits

Image of Product. Front orientation. Flow Transmitters. Build-Your-Own Flanged Pipe Flow Transmitters, Mounting Hardware.

For Flange ANSI Class	Includes		Each



2	150	4 Studs, 12 Nuts, 2 Gaskets, 2 Centering Rings	0000000	0000000

High-Accuracy Flow and Temperature Transmitters

Also known as magmeters, these transmitters use a magnetic field to measure flow rate and temperature with high accuracy. Because they use a magnetic field, they only work with conductive liquids, such as water. These transmitters, also known as transducers, convert measurements to an electrical signal that can be interpreted by receiving devices, such as remote displays and programmable logic controllers (PLCs) to monitor flow or control equipment. For your receiving device to interpret the signal, you will need to calibrate it for the measurement range and output signal of the transmitter. As flow or temperature increases, the output signal increases. These transmitters have one analog output for flow and another for temperature. They only give accurate readings within the rated measurement range. A digital display makes it easy to view readings and adjust settings at the source. Mount these transmitters inline with your pipe system. They measure flow correctly in any mounting orientation.

These transmitters are calibrated with water. They can only be used with liquids with a conductivity of at least 20 µS/cm.

			Flow Range
	Flow Measurement Type	Pipe Connections	Gallons per Minute, gpm	Liters per Minute, L/min	End-to-End Lg.	Accuracy	Max. Pressure @ Temp.	Temp. Range, ° F	Input Voltage Range, V DC	Mounting Position	Field Recalibratable	Enclosure Rating		Each
Two 4-20 mA Analog Transmitter Outputs—4-Pole Micro M12 Connection Plugs







				316 Stainless Steel/Plastic/Polybutylene Body with 316 Stainless Steel Fitting

				Magnetic Induction	2 NPT Female	1.3 to 158.5	5 to 600	7 1/16"	±0.8%	225 psi @ 70° F	0 to 175	20 to 30	Any Angle	No	IP65, IP67	00000000	000000000