4-20mA Transmitters | McMaster-Carr

Filter by

Output Current

20 mA

System of Measurement

Maximum Flow

For Use With

Shaft Diameter

Gear Box Input Connection

Shaft

Shaft Opening

Electrical Connection

Calibrated With

Resolution

Pipe Size

Input Voltage

Body Material

Measures

Minimum Flow

Encoder Output Channel Type

Quadrature

Quadrature with Index

Single

Flow Measurement Unit

Output Signal Type

RoHS

Compliant with Exemptions

Mount Type

Thread Type

Wetted Parts Material

Environment

REACH

Export Control Classification Number (ECCN)

3A001

EAR99

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

DFARS Specialty Metals

Exempt

Forward

How can we improve?

20 Products

Flow Transmitters

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.

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	Input Voltage Range, V DC	Mounting Position	Field Recalibratable	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	4386N201	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	4386N202	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	4386N203	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	4386N204	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	4386N205	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	4386N206	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	4386N207	000000

Compact Rotary Encoders

Track distance, direction, and speed in tight spaces on machinery. Cylindrical and about half the size of standard position-measuring transmitters, these are often used on robot arms and crowded conveyors. Also known as encoders, they send motion data to your system by converting rotary motion into an electrical signal.

Incremental Optical Encoders with Shaft

Wire Lead

Connection—NPN Open

Collector

Incremental transmitters track how much a rotating shaft has turned relative to a reference point. They need to be reset after a power loss.

Transmitters with a shaft connect to a motor’s shaft with a flexible shaft coupling to fit different diameters.

NPN Open Collector—Transmitters with an NPN open collector pair with a resistor. Use these transmitters with a controller that has quadrature detection to get a 4X resolution increase.

IP64 Enclosure Rating—IP-rated transmitters are protected from dust and water.

											Mounting Holes
	Shaft Dia.	Rotary Encoder Type	Input Voltage, V DC	Max. Input Current, mA	Output Current, mA	Encoder Output Channel Type	For Max. Shaft Speed, rpm	Body Material	Housing Material	Enclosure Rating	No. of	Thread Size	Fasteners Included	Choose a Resolution		Each
Wire Lead Connection—NPN Open Collector



		1/4"	Single Turn	5 to 28	65	20	Quadrature with Index	8,000	Aluminum	Plastic	IP64	3	M3 × 0.5 mm	No	500, 1,000, 2,000, 2,500	9749T3	0000000

Incremental Optical Encoders with Shaft Opening

Wire Lead

Connection—NPN

Open Collector

Incremental transmitters track how much a rotating shaft has turned relative to a reference point. They need to be reset after a power loss.

Transmitters with a shaft opening slide onto your motor's shaft. Their mounting plate flexes to compensate for your motor's vibration.

NPN Open Collector—Transmitters with an NPN open collector pair with a resistor. Use these transmitters with a controller that has quadrature detection to get a 4X resolution increase.

IP64 Enclosure Rating—IP-rated transmitters are protected from dust and water.

													Mounting Holes
	For Shaft Dia.	Rotary Encoder Type	Input Voltage, V DC	Max. Input Current, mA	Output Current, mA	Encoder Output Channel Type	For Max. Shaft Speed, rpm	Body Material	Housing Material	Enclosure Rating	Mounting Plate Wd.	For Screw Size	No. of	Ctr.-to-Ctr.	Fasteners Included	Choose a Resolution		Each
Wire Lead Connection—NPN Open Collector



		1/4"	Single Turn	5 to 28	65	20	Quadrature with Index	8,000	Aluminum	Plastic	IP64	2.16"	No. 6	2	1.81"	No	500, 1,000, 2,000, 2,500	9749T1	0000000


		3/8"	Single Turn	5 to 28	65	20	Quadrature with Index	8,000	Aluminum	Plastic	IP64	2.16"	No. 6	2	1.81"	No	500, 1,000, 2,000, 2,500	9749T2	000000

Programmable Rotary Encoders

With adjustable settings for resolution and output type, these transmitters can be programmed to suit your changing processes. Also known as encoders, they convert a shaft’s rotary motion into an electrical signal that indicates distance, direction, and speed. They’re rated IP67, so they can withstand temporary submersion in water.

Encoders with Shaft

Transmitters with a shaft connect to motor shafts with a flexible shaft coupling, so they can be adapted to different diameters.

	Encoder Output Signal	Input Voltage, V DC	Max. Input Current, mA	Output Current, mA	For Max. Shaft Speed, rpm	Body Material	Housing Material	Enclosure Rating	Mounting Hole Thread Size	Fasteners Included	Resolution		Each
Incremental Optical Encoder



	1/4"	Line Driver, NPN Open Collector, Push-Pull	5 to 30	65	20	8,000	Aluminum	Aluminum	IP67	10-32	No	1 to 65,536	9924N121	0000000


	3/8"	Line Driver, NPN Open Collector, Push-Pull	5 to 30	65	20	8,000	Aluminum	Aluminum	IP67	10-32	No	1 to 65,536	9924N122	000000

Rotary Encoder Programming Kits

You’ll need a programming kit (sold separately) to set up these transmitters. They include software stored on a flash drive, as well as a cable and USB adapter for connecting your transmitter to a computer. The software requires a Windows 7 or higher operating system.

Data Connection		Each
USB-A	9924N125	0000000

Encoders with Shaft Opening

Transmitters with a shaft opening can be mounted anywhere along a motor shaft—just slide them on. They have a flexible mounting plate that compensates for shaft misalignment and vibration.

	Encoder Output Signal	Input Voltage, V DC	Max. Input Current, mA	Output Current, mA	For Max. Shaft Speed, rpm	Body Material	Housing Material	Enclosure Rating	Mounting Plate Wd.	For Screw Size	Fasteners Included	Resolution		Each
Incremental Optical Encoder



	1/4"	Line Driver, NPN Open Collector, Push-Pull	5 to 30	65	20	6,000	Aluminum	Aluminum	IP67	2.83"	No. 6	No	1 to 65,536	9924N123	0000000


	3/8"	Line Driver, NPN Open Collector, Push-Pull	5 to 30	65	20	6,000	Aluminum	Aluminum	IP67	2.83"	No. 6	No	1 to 65,536	9924N124	000000

Rotary Encoder Programming Kits

Data Connection		Each
USB-A	9924N125	0000000

Sanitary Rotary Encoders

Also known as encoders, these sanitary transmitters convey motion to an electrical signal that conveys distance, direction, and speed. They’re often used in control systems to automate servomotors, robotics, and assembly machines in sanitary environments such as food and pharmaceutical plants. Made of corrosion-resistant stainless steel, they won’t rust from frequent washdowns with harsh cleaners. These transmitters are sealed and have a highly polished surface, leaving no room for bacteria to grow and making them easier to clean. They’re rated IP67 for protection from dust, high-pressure jets of water, and submersion in up to a meter of water for 30 minutes.

To achieve a 4X resolution increase, use these transmitters with a controller that has quadrature detection.

Use a flexible shaft coupling to connect the transmitter shaft to a drive shaft.

316 Stainless Steel Body and 303 Stainless Steel Shaft

							Shaft			Overall		Mounting Plate		Mounting Holes
	For Counter Function	Encoder Output Channel	Resolution	Resolution Increase	For Max. Shaft Speed, rpm	Input Voltage, V DC	Coupling Req.	Dia.	Lg.	Lg.	Ht.	Lg.	Wd.	No. of	Ctr.-to-Ctr.	Dia.	Certification		Each
Quadrature with Index Output Channel—20 mA Output Current



		Up and Down	A, B, Z	600	2X, 4X	8,000	4.75 to 28	Yes	3/8"	1 1/16"	3.175"	3 1/4"	2 1/2"	2 1/2"	4	2.06"	7/32"	CE Marked	4136N111	000000000


		Up and Down	A, B, Z	3,600	2X, 4X	8,000	4.75 to 28	Yes	3/8"	1 1/16"	3.175"	3 1/4"	2 1/2"	2 1/2"	4	2.06"	7/32"	CE Marked	4136N116	00000000

Cables

Lg.		Each
32 3/4"	4136N127	0000000

Rotary Encoder Kits


Shown with Wheel (Sold Separately)

In addition to a transmitter, these kits include a 6 _1/2-ft. cable and a mounting bracket. Also known as encoders, transmitters convert motion to an electrical signal to indicate distance, direction, and speed in process control and metering applications. These kits are commonly used to monitor the position or velocity of rotating equipment. You can also mount a wheel (not included) to measure distance in linear applications. Transmitters must be used with a controller that has quadrature detection to get a 4X resolution increase. Output channel Z is also known as an index channel.

Use a flexible shaft coupling (not included) to connect the transmitter shaft to a drive shaft.

	Encoder Output Channel	Resolution Increase	For Max. Shaft Speed, rpm	Input Voltage, V DC	Output Current, mA	Resistor Included	Body Material	Shaft Material	Fasteners Included	Fasteners Req.	For Mounting Screw Size	Choose a Resolution		Each
Quadrature with Index Output Channel



	Up and Down	A, B, Z	2X, 4X	6,000	5 to 28	20	No	Plastic	Stainless Steel	No	Yes	1/4"	500, 600, 1,000, 1,800, 2,500	16695T57	0000000

Wheels