4 Pipe Size Flow Switches

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About Flowmeters and Totalizers

Flowmeters measure the rate of flow for a liquid or a gas. Totalizers measure the cumulative flow volume. Flowmeter/totalizers display both the flow rate and the cumulative flow volume.

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.

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

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.

Choose a fitting material that is compatible with the liquid you're running through your line. Brass and 316 stainless steel fittings resist impact better than Noryl plastic fittings.

IP65 rated switches seal out dust and can be lightly rinsed. NEMA 4X rated switches protect against dust, weather, and washdowns.

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

Noryl Plastic Body with Brass Fittings
Pipe Size	Thread Type	Gender	For Pipe Size	Set Point Range, gpm	Max. Flow Rate, gpm	Set Point Adjustment Method	Paddle Material	Max. Pressure	Temp. Range, °F	Max. Switching Current @ Voltage	Body Ht.	Environmental Rating	Specifications Met		Each
Threaded Connection
1/2	NPT	Male	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 1100	Trimmable Paddles	Noryl Plastic	160 psi @ 70° F	-13° to 212°	1 A @ 230 V AC 1 A @ 48 V DC	2 1/2"	IP65	UL 508	0000000	0000000
1/2	NPT	Male	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 1900	Trimmable Paddles	301 Stainless Steel	160 psi @ 70° F	-13° to 212°	1 A @ 230 V AC 1 A @ 48 V DC	2 1/2"	IP65	UL 508	00000000	000000
Brass Body with Brass Fittings
Threaded Connection
1	NPT	Male	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	Removable Layered Paddles, Trimmable Paddles	304 Stainless Steel	160 psi @ 70° F	33° to 225°	3.7 A @ 240 V AC 7.4 A @ 120 V AC	5"	NEMA 4X	C-UL Listed, UL Recognized Component	000000	000000
1	NPT	Male	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	Removable Layered Paddles, Trimmable Paddles	304 Stainless Steel	160 psi @ 70° F	33° to 300°	3.7 A @ 240 V AC 7.4 A @ 120 V AC	5"	__	C-UL Listed, UL Listed	000000	000000
316 Stainless Steel Body with 316 Stainless Steel Fittings
Threaded Connection
1	NPT	Male	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	Removable Layered Paddles, Trimmable Paddles	304 Stainless Steel	160 psi @ 70° F	33° to 300°	3.7 A @ 240 V AC 7.4 A @ 120 V AC	5"	__	C-UL Listed, UL Listed	000000	000000

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

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

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

				Set Point Range		Max. Flow Rate					Conduit
Pipe Size	Thread Type	Gender	For Pipe Size	For Water and Oil, gpm	For Air and Inert Gas, scfm	For Water and Oil, gpm	For Air and Inert Gas	Max. Pressure	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 to 7 4 to 15 12 to 95 140 to 900 400 to 2,400	17 to 32 13 to 65 50 to 400 800 to 3,450 2,850 to 10,000	55 97 391 3,525 9,792	Not Rated	1000 psi @ 70° F	-4° to 275°	5 A @ 125 V AC 5 A @ 250 V 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 to 7 4 to 15 12 to 95 140 to 900 400 to 2,400	17 to 32 13 to 65 50 to 400 800 to 3,450 2,850 to 10,000	55 97 391 3,525 9,792	Not Rated	2000 psi @ 70° F	-4° to 275°	5 A @ 125 V AC 5 A @ 250 V AC	3/4	NPT	Female	8"	00000000	00000000
DPDT
Brass Body
1 1/2	NPT	Male	1 1/2 2 4 12 20	3 to 7 4 to 15 12 to 95 140 to 900 400 to 2,400	17 to 32 13 to 65 50 to 400 800 to 3,450 2,850 to 10,000	55 97 391 3,525 9,792	Not Rated	1000 psi @ 70° F	-4° to 275°	5 A @ 125 V AC 5 A @ 250 V 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 to 7 4 to 15 12 to 95 140 to 900 400 to 2,400	17 to 32 13 to 65 50 to 400 800 to 3,450 2,850 to 10,000	55 97 391 3,525 9,792	Not Rated	2000 psi @ 70° F	-4° to 275°	5 A @ 125 V AC 5 A @ 250 V AC	3/4	NPT	Female	8"	00000000	00000000

Noncontact 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.

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

	Flow Range for Pipe Size, gpm
For Pipe Size	3/4	2	4	End-to-End Lg.	Accuracy	Temp. Range, °F	Input Voltage	Mounting Orientation	Field Recalibratable		Each
One Digital Pulse Output and One 4-20mA Analog Transmitter Output—Wire Leads
Polycarbonate Plastic Body
3/4 to 4	0 to 45	0 to 320	0 to 1,285	9 3/4"	±3%	32° to 185°	12V DC to 24V AC/DC	Any	Yes	0000000	000000000