NPT Flow Transmitters | McMaster-Carr

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57 Products

Flow Transmitters with Sight

Send flow rate data using these transmitters while also being able to visually confirm liquid is flowing. They measure flow by counting how many times the turbine turns as the liquid moves through it. To prevent clogging the turbine and other damage, use them only with clean, low-viscosity liquids. These transmitters, also known as transducers, convert the flow measurement 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. Mount them directly inline with your system. They measure accurately in any mounting orientation.

These transmitters 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.

Analog Transmitter Output—Transmitters with an analog output increase their output signal as flow 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.

Digital Pulse Output—Transmitters with a digital pulse output send flow data using spikes of voltage that match the input voltage of the transmitter. The higher the flow, the more pulses they send.

	End-to-End Lg.	Accuracy	Max. Pressure @ Temp.	Temp. Range, ° F	Seal Material	Input Voltage Range, V DC	Mounting Position	Field Recalibratable	Pulse Freq., Hz	Pulse Frequency per Volume, pulse per gal.		Each
One 4-20 mA Analog Transmitter Output—Wire Lead Connection







	Glass-Filled Polypropylene Body with Glass-Filled Polypropylene Fitting

	Turbine	1/2 NPT Female	0.25 to 2.5	3 11/16"	±2%	150 psi @ 70° F	20 to 150	Buna-N	12 to 24	Any Angle	No	—	—	00000000	0000000


	Turbine	1/2 NPT Female	0.5 to 5	3 11/16"	±2%	150 psi @ 70° F	20 to 150	Buna-N	12 to 24	Any Angle	No	—	—	00000000	000000
	Turbine	1/2 NPT Female	1.5 to 15	3 11/16"	±2%	150 psi @ 70° F	20 to 150	Buna-N	12 to 24	Any Angle	No	—	—	00000000	000000




			316 Stainless Steel Body with 316 Stainless Steel Fitting

			Turbine	1/2 NPT Female	0.25 to 2.5	3 11/16"	±2%	200 psi @ 70° F	20 to 212	Buna-N	12 to 24	Any Angle	No	—	—	00000000	00000000


			Turbine	1/2 NPT Female	0.5 to 5	3 11/16"	±2%	200 psi @ 70° F	20 to 212	Buna-N	12 to 24	Any Angle	No	—	—	00000000	00000000
			Turbine	1/2 NPT Female	1.5 to 15	3 11/16"	±2%	200 psi @ 70° F	20 to 212	Buna-N	12 to 24	Any Angle	No	—	—	00000000	00000000
			Turbine	3/4 NPT Female	1.5 to 15	5 1/4"	±2%	200 psi @ 70° F	20 to 212	Buna-N	12 to 24	Any Angle	No	—	—	00000000	00000000
			Turbine	3/4 NPT Female	5 to 50	5 1/4"	±2%	200 psi @ 70° F	20 to 212	Buna-N	12 to 24	Any Angle	No	—	—	00000000	00000000
			Turbine	1 NPT Female	1.5 to 15	5 1/4"	±2%	200 psi @ 70° F	20 to 212	Buna-N	12 to 24	Any Angle	No	—	—	00000000	00000000
			Turbine	1 NPT Female	5 to 50	5 1/4"	±2%	200 psi @ 70° F	20 to 212	Buna-N	12 to 24	Any Angle	No	—	—	00000000	00000000


			One 0-5V DC Analog Transmitter Output—Wire Lead Connection







							Glass-Filled Polypropylene Body with Glass-Filled Polypropylene Fitting

							Turbine	1/2 NPT Female	0.25 to 2.5	3 11/16"	±2%	150 psi @ 70° F	20 to 150	Buna-N	12 to 24	Any Angle	No	—	—	00000000	000000


							Turbine	1/2 NPT Female	0.5 to 5	3 11/16"	±2%	150 psi @ 70° F	20 to 150	Buna-N	12 to 24	Any Angle	No	—	—	00000000	000000
							Turbine	1/2 NPT Female	1.5 to 15	3 11/16"	±2%	150 psi @ 70° F	20 to 150	Buna-N	12 to 24	Any Angle	No	—	—	00000000	000000




									316 Stainless Steel Body with 316 Stainless Steel Fitting

									Turbine	1/2 NPT Female	0.25 to 2.5	3 11/16"	±2%	200 psi @ 70° F	20 to 212	Buna-N	12 to 24	Any Angle	No	—	—	00000000	000000


									Turbine	1/2 NPT Female	0.5 to 5	3 11/16"	±2%	200 psi @ 70° F	20 to 212	Buna-N	12 to 24	Any Angle	No	—	—	00000000	000000
									Turbine	1/2 NPT Female	1.5 to 15	3 11/16"	±2%	200 psi @ 70° F	20 to 212	Buna-N	12 to 24	Any Angle	No	—	—	00000000	000000
									Turbine	3/4 NPT Female	1.5 to 15	5 1/4"	±2%	200 psi @ 70° F	20 to 212	Buna-N	12 to 24	Any Angle	No	—	—	00000000	00000000
									Turbine	3/4 NPT Female	5 to 50	5 1/4"	±2%	200 psi @ 70° F	20 to 212	Buna-N	12 to 24	Any Angle	No	—	—	00000000	00000000
									Turbine	1 NPT Female	1.5 to 15	5 1/4"	±2%	200 psi @ 70° F	20 to 212	Buna-N	12 to 24	Any Angle	No	—	—	00000000	00000000
									Turbine	1 NPT Female	5 to 50	5 1/4"	±2%	200 psi @ 70° F	20 to 212	Buna-N	12 to 24	Any Angle	No	—	—	00000000	00000000


									One Digital Pulse Output—Wire Lead Connection







									Polypropylene Body with Polypropylene Fitting

									Turbine	1/4 NPT Female	0.1 to 5	3 1/16"	±7%	100 psi @ 70° F	33 to 180	Fluoroelastomer	4.25 to 24	Any Angle	No	15 to 225	—	0000000	000000


									Turbine	1/2 NPT Female	1.5 to 20	3 1/16"	±15%	100 psi @ 70° F	33 to 180	Fluoroelastomer	4.25 to 24	Any Angle	No	15 to 225	—	0000000	000000




		Brass Body with Brass Fitting

		Turbine								1/4 NPT Female	0.1 to 5	3"	±7%	200 psi @ 70° F	33 to 212	Fluoroelastomer	4.5 to 24	Any Angle	No	15 to 225	—	0000000	000000


		Turbine								1/2 NPT Female	1.5 to 20	3"	±15%	200 psi @ 70° F	33 to 212	Fluoroelastomer	4.5 to 24	Any Angle	No	15 to 225	—	0000000	000000
		Turbine								1 NPT Female	8 to 60	3 15/16"	±15%	200 psi @ 70° F	33 to 212	Fluoroelastomer	4.5 to 24	Any Angle	No	15 to 225	—	0000000	000000




											316 Stainless Steel Body with 316 Stainless Steel Fitting

											Turbine	1/2 NPT Female	0.25 to 2.5	3 11/16"	±2%	200 psi @ 70° F	20 to 212	Buna-N	12 to 24	Any Angle	No	—	200	00000000	000000


			Turbine								1/2 NPT Female	1.5 to 20	3"	±15%	200 psi @ 70° F	33 to 212	Fluoroelastomer	4.5 to 24	Any Angle	No	15 to 225	—	0000000	000000
			Turbine	3/4 NPT Female							5 to 30	3 15/16"	±15%	200 psi @ 70° F	33 to 212	Fluoroelastomer	4.5 to 24	Any Angle	No	15 to 225	—	0000000	000000
			Turbine	1 NPT Female							8 to 60	3 15/16"	±15%	200 psi @ 70° F	33 to 212	Fluoroelastomer	4.5 to 24	Any Angle	No	15 to 225	—	0000000	000000

Flow Transmitters

Variable Area

Flow Measurement

Turbine Flow

Measurement

Send flow rate measurements to monitor and control equipment. Also known as transducers, these transmitters convert flow rate measurements to an electrical signal that can be interpreted by receiving devices, such as remote displays and programmable logic controllers (PLCs). As flow 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 flow correctly no matter their mounting orientation.

These transmitters 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.

Variable Area Flow Measurement—Variable-area transmitters determine flow rate by tracking where the liquid pushes an internal piston.

Turbine Flow Measurement—Turbine transmitters measure flow by counting how many times their turbine turns as liquid passes through. To avoid clogging the turbine and other damage, use them only with clean, low-viscosity liquids. The digital output sends flow data with a pulse, which is a spike of voltage. The higher the flow, the more pulses they send. The voltage of the pulse output matches the input voltage sent to the transmitters. These transmitters meet NSF/ANSI 61 for use with drinking water.

	End-to-End Lg.	Accuracy	Max. Pressure @ Temp.	Temp. Range, ° F	Seal Material	Input Voltage Range, V DC	Mounting Position	Field Recalibratable	Enclosure Rating	Pulse Freq., Hz		Each
One Analog Transmitter/Digital Pulse Output—Wire Lead Connection







	Nylon Body with Nylon Fitting

	Turbine	1/4 NPT Male	0.026 to 0.65	1 3/4"	±3%	362 psi @ 212° F	-4 to 212	—	5 to 24	Any Angle	No	—	36 to 902	00000000	0000000


	Turbine	3/8 NPT Male	0.13 to 1.3	2 5/32"	±3%	362 psi @ 212° F	-4 to 212	—	5 to 24	Any Angle	No	—	56 to 565	00000000	000000
	Turbine	3/8 NPT Male	0.26 to 4	2 5/32"	±3%	362 psi @ 212° F	-4 to 212	—	5 to 24	Any Angle	No	—	36 to 553	00000000	000000
	Turbine	3/8 NPT Male	0.53 to 9.2	2 5/32"	±3%	362 psi @ 212° F	-4 to 212	—	5 to 24	Any Angle	No	—	25 to 435	00000000	000000
	Turbine	3/4 NPT Male	1.32 to 17.17	2 15/16"	±3%	362 psi @ 212° F	-4 to 212	—	5 to 24	Any Angle	No	—	17 to 227	00000000	000000




			Brass Body with Brass Fitting

			Turbine	3/8 NPT Male	0.5 to 2.11	2 5/32"	±3%	362 psi @ 212° F	-4 to 212	—	5 to 24	Any Angle	No	—	132 to 559	00000000	000000


			Turbine	3/8 NPT Male	0.8 to 6.6	2 5/32"	±3%	362 psi @ 212° F	-4 to 212	—	5 to 24	Any Angle	No	—	46 to 383	00000000	000000


			One 4-20 mA Analog Transmitter Output—4-Pole Micro M12 Connection Plug







							316L Stainless Steel/Aluminum/Brass/Plastic Body with 316 Stainless Steel/Brass Fitting

							Variable Area	1 NPT Female	0.5 to 27	3 5/8"	±5%	362 psi @ 212° F	14 to 212	Fluoroelastomer	18 to 32	Any Angle	No	IP65, IP67	—	00000000	000000


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







											316L Stainless Steel/Aluminum/Brass/Plastic Body with 316 Stainless Steel/Brass Fitting

											Variable Area	3/4 NPT Female	0.1 to 4	2 15/16"	±5%	580 psi @ 212° F	14 to 212	Fluoroelastomer	18 to 30	Any Angle	No	IP65, IP67	—	00000000	000000


											Variable Area	3/4 NPT Female	0.1 to 6	2 15/16"	±5%	580 psi @ 212° F	14 to 212	Fluoroelastomer	18 to 30	Any Angle	No	IP65, IP67	—	00000000	000000
											Variable Area	3/4 NPT Female	0.2 to 10	2 15/16"	±5%	580 psi @ 212° F	14 to 212	Fluoroelastomer	18 to 30	Any Angle	No	IP65, IP67	—	00000000	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 Micro 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	00000000	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	00000000	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	00000000	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	00000000	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	00000000	00000000

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 Micro 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	0000000	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	0000000	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	0000000	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	0000000	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	0000000	000000


	Two 4-20 mA Analog Transmitter Outputs—4-Pole Micro 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	0000000	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	0000000	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	0000000	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 Micro 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	0000000	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	0000000	00000000

Ultra-Low-Flow Flow Transmitters

Often used in low-flow metering applications for lubricants or antifreeze, these transmitters measure flow rate and send the data to a remote display or programmable logic controller (PLC). To measure flow, they have oval-shaped gears that move the liquid through the flowmeter—how fast the gears turn correspond to the flow rate. Also known as transducers, they help you monitor status or control equipment by converting measurements to an electrical pulse that can be interpreted by receiving devices. The higher the flow, the more pulses they send. Mount them inline with your pipe system. They’re accurate in any mounting orientation.

These transmitters are calibrated with oil but can be used with other liquids and will generally measure accurately, even if they differ in viscosity and density.

	Accuracy	Overall Ht.	Dia.	Max. Pressure @ Temp.	Temp. Range, ° F	Seal Material	Input Voltage Range, V DC	Mounting Position	Field Recalibratable	Pulse Frequency per Volume, pulse per ml		Each
One Digital Pulse Output—Wire Lead Connection







	316 Stainless Steel Body

	Positive Displacement	1/8 NPT Female	3 to 300	±0.5%	2 7/8"	1 1/2"	1,450 psi @ 70° F	-22 to 176	Viton® Fluoroelastomer	4 to 26	Any Angle	No	9	0000000	000000000


	Positive Displacement	1/8 NPT Female	10 to 1,000	±0.5%	2 7/8"	1 15/16"	1,450 psi @ 70° F	-22 to 176	Viton® Fluoroelastomer	4 to 26	Any Angle	No	4	0000000	00000000