E174189 Flow Switches | McMaster-Carr

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0.55 gpm to 54.21 gpm

0.97 gpm to 96.37 gpm

0.14 scfm to 2 scfm

0.38 scfm to 44 scfm

0.54 scfm to 8.05 scfm

1.1 scfm to 132 scfm

1.21 scfm to 18.11 scfm

2.15 scfm to 32.21 scfm

4.84 scfm to 72.47 scfm

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DFARS Specialty Metals

Maximum Temperature

27 Products

Electronic Insertion-Mount Flow Switches

Instead of disassembling your system for inline installation, thread these flow switches onto a mounting adapter (sold separately) and insert them into a pipe tee or pipe outlet. They send digital signals to your programmable logic controller (PLC) to activate automated controls or alarms when they reach a set flow rate. To calculate the flow rate, they generate a small amount of heat, then measure the cooling effect your liquid or gas has on it. This makes them ideal in applications with fluctuating temperatures. Use the buttons on the display to adjust the set point and other settings. These switches are accurate in any mounting position.

IP65 rated switches protect against dust and washdowns. IP67 rated switches withstand temporary submersion.

		Flow Set Point									1 13/16" Probe Length
	For Pipe Size	For Liquids, gpm	For Gas, scfm	Max. Pressure @ Temp.	Temp. Range, ° F	Voltage, V DC	Max. Switching Current @ Voltage	Body Ht.	Enclosure Rating	Certification		Each
304 Stainless Steel Body with 316 Stainless Steel Fittings







				1 Digital NPN Signal Output

				1/4 1/2 3/4 1	0.02 to 1.5 0.05 to 4.9 0.13 to 12.7 0.23 to 23	0.14 to 2 0.54 to 8.05 1.21 to 18.11 2.15 to 32.21	4,300 psi @ 70° F	-10 to 175	36	250 mA @ 19V DC 250 mA @ 36V DC	2 11/16"	IP65, IP67	C-UL Listed UL Listed CE Marked	4547N13	0000000




						1 Digital PNP Signal Output

						1/4 1/2 3/4 1	0.02 to 1.5 0.05 to 4.9 0.13 to 12.7 0.23 to 23	0.14 to 2 0.54 to 8.05 1.21 to 18.11 2.15 to 32.21	4,300 psi @ 70° F	-10 to 175	36	250 mA @ 36V DC 250 mA @ 18V DC	2 11/16"	IP65, IP67	C-UL Listed UL Listed CE Marked	4547N11	000000




								2 Digital NPN Signal Output

								1/4 1/2 3/4 1	0.02 to 1.5 0.05 to 4.9 0.13 to 12.7 0.23 to 23	0.14 to 2 0.54 to 8.05 1.21 to 18.11 2.15 to 32.21	4,300 psi @ 70° F	-10 to 175	36	250 mA @ 19V DC 250 mA @ 36V DC	2 11/16"	IP65, IP67	C-UL Listed UL Listed CE Marked	4547N14	000000




										2 Digital PNP Signal Output

										1/4 1/2 3/4 1	0.02 to 1.5 0.05 to 4.9 0.13 to 12.7 0.23 to 23	0.14 to 2 0.54 to 8.05 1.21 to 18.11 2.15 to 32.21	4,300 psi @ 70° F	-10 to 175	36	250 mA @ 36V DC 250 mA @ 18V DC	2 11/16"	IP65, IP67	C-UL Listed UL Listed CE Marked	4547N12	000000

Mounting Adapters

Threaded Fitting

Connection

	Thread Type	Gender	Lg.	Material		Each
Threaded Fitting Connection



	1/4	NPT	Male	1 7/16"	316 Stainless Steel	4547N15	000000


	1/2	NPT	Male	1 1/8"	316 Stainless Steel	4547N16	00000
	3/4	NPT	Male	15/16"	304 Stainless Steel	4547N17	00000
	1	NPT	Male	1 3/8"	304 Stainless Steel, Brass	4547N18	00000

Flow and Temperature Transmitters

Variable Area Flow

Measurement

Vortex Flow

Measurement

Send flow rate and temperature measurements simultaneously to a programmable logic controller (PLC), data logger, or other receiving device. Used to monitor status or control equipment, these transmitters, also known as transducers, convert measurements to an electrical signal that is interpreted by receiving devices. As flow or temperature increases, the output signal increases. 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. Mount them inline with your pipe system. They’ll measure flow correctly in any mounting orientation.

A digital display makes it easy to view readings and adjust settings at the source. To change settings and receive error messages remotely from your PLC or computer, program one of the outputs to use IO Link. You’ll need an IO Link controller (not included) to connect to your interface.

Variable Area Flow Measurement—Variable-area transmitters determine the flow rate by tracking where the liquid pushes the piston. They have two configurable outputs. One can be wired as an analog output or a digital switch. The other one can be wired as a digital switch, digital pulse output, or IO Link. Pulse outputs send flow data using spikes of voltage that match the input voltage of the transmitter. The higher the flow, the more pulses they send. These transmitters are calibrated with water, glycol solutions, and coolants but can be recalibrated in the field for other liquids.

Vortex Flow Measurement—Vortex transmitters determine the flow rate by measuring the size of the vortex created as liquid flows through them. They don’t have any moving parts that can break or get stuck. Use them only with liquids that are at least 95% water. They have one analog output for flow and another for temperature. The output for temperature can also be wired for IO Link.

	End-to-End Lg.	Accuracy	Max. Pressure @ Temp.	Temp. Range, ° F	Seal Material	Input Voltage Range, V DC	Mounting Position	Field Recalibratable	Enclosure Rating		Each
One Digital Switch/Pulse Output and One 4-20 mA Analog Transmitter/Digital Switch Output—4-Pole M12 Connection Plug







	316 Stainless Steel Body with 316 Stainless Steel Fitting

	Variable Area	3/4 NPT Female	5 to 240	5 9/16"	±5%	580 psi @ 70° F	14 to 212	Fluoroelastomer	18 to 30	Any Angle	Yes	IP65, IP67	4401N11	0000000


	Variable Area	3/4 NPT Female	7 to 360	5 9/16"	±5%	580 psi @ 70° F	14 to 212	Fluoroelastomer	18 to 30	Any Angle	Yes	IP65, IP67	4401N12	000000
	Variable Area	3/4 NPT Female	10 to 600	5 9/16"	±5%	580 psi @ 70° F	14 to 212	Fluoroelastomer	18 to 30	Any Angle	Yes	IP65, IP67	4401N13	000000
	Variable Area	1 NPT Female	30 to 1,620	5 3/4"	±5%	362 psi @ 70° F	14 to 212	Fluoroelastomer	18 to 30	Any Angle	Yes	IP65, IP67	4401N14	000000
	Variable Area	1 1/2 NPT Female	60 to 3,000	6 3/16"	±5%	362 psi @ 70° F	14 to 212	Fluoroelastomer	18 to 30	Any Angle	Yes	IP65, IP67	4401N15	000000


	Two 4-20 mA Analog Transmitter Outputs—4-Pole M12 Connection Plugs







					316 Stainless Steel Body with 316 Stainless Steel Fitting

					Vortex	1/2 NPT Female	16 to 317	4 11/16"	±2%	172 psi @ 70° F	14 to 190	Fluoroelastomer	18 to 30	Any Angle	No	IP65, IP67	4401N16	000000


					Vortex	1/2 NPT Female	32 to 634	4 11/16"	±2%	172 psi @ 70° F	14 to 190	Fluoroelastomer	18 to 30	Any Angle	No	IP65, IP67	4401N17	000000
					Vortex	3/4 NPT Female	80 to 1,585	5 15/32"	±2%	172 psi @ 70° F	14 to 190	Fluoroelastomer	18 to 30	Any Angle	No	IP65, IP67	4401N18	000000

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 M12 Connection Plugs







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

				Magnetic Induction	1/2 NPT Female	0.03 to 6.6	0.1 to 25	2 1/8"	±2%	225 psi @ 70° F	0 to 175	20 to 30	Any Angle	No	IP67	4397N101	0000000


				Magnetic Induction	3/4 NPT Female	0.02 to 13.22	0.2 to 50	2 1/8"	±2%	225 psi @ 70° F	0 to 175	20 to 30	Any Angle	No	IP67	4397N102	000000
				Magnetic Induction	1 NPT Female	0.1 to 26.4	0.2 to 100	2 1/8"	±2%	225 psi @ 70° F	0 to 175	20 to 30	Any Angle	No	IP67	4397N103	000000
				Magnetic Induction	1 1/2 NPT Female	1.3 to 79.3	5 to 300	6 11/16"	±0.8%	225 psi @ 70° F	0 to 175	20 to 30	Any Angle	No	IP65, IP67	4397N104	00000000
				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	4397N105	00000000

Sanitary Electronic Insertion-Mount Flow Switches

Easy to clean and install, these flow switches are 3-A certified to meet sanitary design standards and insert into your line with a quick-clamp mounting adapter (sold separately). They have a smooth probe, and unlike flow switches that measure with a paddle or turbine, these don’t have moving parts for contaminants to get stuck in. Rated IP67 and IP69K, they withstand temporary submersion and high-temperature, high-pressure washdowns. The mounting adapter attaches to a quick-clamp tube tee or outlet (often called tri-clamp fittings) in your large-diameter tubing system using a gasket and clamp (not included), so you don't need to disassemble your line for inline installation. This mounting adapter is also easy to remove and clean.

They send digital signals to your programmable logic controller (PLC) to activate automated controls or alarms when they reach a set flow rate. To calculate the flow rate, they generate a small amount of heat, then measure the cooling effect your liquid or gas has on it. This makes them ideal in applications with fluctuating temperatures. Use the buttons on the display to adjust the set point and other settings. They’re accurate in any mounting position.

		Flow Set Point										13/16" Probe Length		1 13/16" Probe Length
	For Tube OD	For Liquids, gpm	For Gas, scfm	Max. Pressure @ Temp.	Temp. Range, ° F	Voltage, V DC	Max. Switching Current @ Voltage	Body Ht.	Enclosure Rating	Certification	Food Industry Std.		Each		Each
316 Stainless Steel Body with 316 Stainless Steel Fittings







				1 Digital PNP Signal Output

				1 1/2" 2"	0.55 to 54.21 0.97 to 96.37	4.84 to 72.47 8.59 to 128.84	430 psi @ 70° F	-10 to 200	36	250 mA @ 19V DC 250 mA @ 36V DC	3 5/16"	IP67, IP69K	C-UL Listed UL Listed CE Marked	3-A Certified 74-07, FDA Compliant 21 CFR 177.2415	4548N11	0000000	4548N12	0000000

Mounting Adapters

Quick-Clamp Fitting

Connection

	Flange OD	Gender	Lg.	Material		Each
Quick-Clamp Fitting Connection



	1 1/2"	1.988"	Male	11/16"	316 Stainless Steel	4548N13	0000000


	2"	2.52"	Male	11/16"	316 Stainless Steel	4548N14	000000

Flow, Pressure, and Temperature Transmitters for Gases

Measure and transmit flow rate, pressure, and temperature of industrial gases, such as air, argon, CO2, and nitrogen, flowing through your system. These transmitters are ideal for applications where temperature and pressure can fluctuate. To calculate flow rate, they generate a small amount of heat, then measure the cooling effect your gas has on it. Also known as transducers, these transmitters convert measurements to an electrical signal that can be interpreted by receiving devices, such as remote displays and programmable logic controllers (PLCs). As flow, temperature, and pressure increases, the output signal increases. 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. Mount them directly inline with your system. They measure correctly no matter their mounting orientation.

A digital display makes it easy to read measurements and adjust settings based on your gas. These transmitters have two configurable outputs, and each output can only be wired for one measurement (flow rate, pressure, or temperature). Outputs configured as digital pulse send flow data using spikes of voltage that match the input voltage of the transmitter. One of the outputs can be wired for IO-Link, so you can change settings and receive error messages remotely from your PLC or computer. You’ll need an IO Link controller (not included) to connect to your interface.

These transmitters are calibrated with air but still measure accurately when used with other gases.

	End-to-End Lg.	Accuracy	Max. Pressure @ Temp.	Temp. Range, ° F	Seal Material	Input Voltage Range, V DC	Mounting Position	Field Recalibratable	Enclosure Rating		Each
One Digital Switch/Pulse Output and One 4-20 mA Analog Transmitter/Digital Switch/Pulse Output—4-Pole M12 Connection Plug







	304 Stainless Steel Body with 304 Stainless Steel Fitting

	Thermal	1/2 NPT Male	0.15 to 44	11 13/16"	±6%	230 psi @ 70° F	14 to 140	Fluoroelastomer	18 to 30	Any Angle	No	IP65, IP67	4384N11	000000000


	Thermal	1 NPT Male	0.4 to 132	18 3/4"	±6%	230 psi @ 70° F	14 to 140	Fluoroelastomer	18 to 30	Any Angle	No	IP65, IP67	4384N12	00000000