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.
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Fixed-Setpoint Flow Switches
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 orientation.
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. Bronze and 316 stainless steel fittings resist impact better than plastic fittings.
SPDT (single pole, double throw) switches can either turn one device from off to on (normally open) or from on to off (normally closed).
For technical drawings and 3-D models, click on a part number.
Stainless Steel Body
with Female Fittings
Conduit | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size | Thread Type | Gender | Set Point, gpm | Approx. Difference Between Setpoint and Reset Point, gpm | Max. Pressure | Temp. Range, °F | Max. Switching Current @ Voltage | Trade Size | Thread Type | Gender | End-to-End Lg. | Mounting Orientation | Each | |
Bronze Body with Bronze Fittings | ||||||||||||||
SPDT | ||||||||||||||
1 1/2 | NPT | Female | 1.5 | 0.225 | 400 psi @ 70 ° F | -20° to 300° | 400 mA @ 30 V AC 170 mA @ 120 V AC 80 mA @ 240 V AC 300 mA @ 30 V DC 130 mA @ 120 V DC 60 mA @ 240 V DC | 1/2 | NPT | Male | 4 1/2" | Any | 00000000 | 0000000 |
1 1/2 | NPT | Female | 5 | 0.75 | 400 psi @ 70 ° F | -20° to 300° | 400 mA @ 30 V AC 170 mA @ 120 V AC 80 mA @ 240 V AC 300 mA @ 30 V DC 130 mA @ 120 V DC 60 mA @ 240 V DC | 1/2 | NPT | Male | 4 1/2" | Any | 00000000 | 000000 |
1 1/2 | NPT | Female | 30 | 4.5 | 400 psi @ 70 ° F | -20° to 300° | 400 mA @ 30 V AC 170 mA @ 120 V AC 80 mA @ 240 V AC 300 mA @ 30 V DC 130 mA @ 120 V DC 60 mA @ 240 V DC | 1/2 | NPT | Male | 4 1/2" | Any | 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 orientation. 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.
For technical drawings and 3-D models, click on a part number.
Set Point, gpm | Max. Pressure | Temp. Range, °F | Voltage | Max. Switching Current | Conduit Trade Size | End-to-End Lg. | Each | |
Bronze Body | ||||||||
---|---|---|---|---|---|---|---|---|
1 1/2 NPT Female | ||||||||
4 to 30 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 0000000 |
5 to 60 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
15 to 100 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
Fixed-Setpoint 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.
For technical drawings and 3-D models, click on a part number.
Set Point | Conduit | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size | Thread Type | Gender | For Liquids, gpm | For Gases, scfm | Max. Pressure | Temp. Range, °F | Voltage | Max. Switching Current | Trade Size | Thread Type | Gender | End-to-End Lg. | Each | |
Brass Body | ||||||||||||||
1 1/2 | NPT | Female | 6 | 33 | 250 psi @ 70° F | -4° to 220° | 120V AC/ 240V AC | 5 A @ 120 V AC | 3/4 | NPT | Male | 2 7/8" | 00000000 | 0000000 |
Insertion Flow Switches
Connection
with IP65 Rating
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.
Choose a fitting material that is compatible with the liquid you're running through your line. Noryl plastic fittings work with a wide range of chemicals. Brass and 316 stainless steel fittings resist impact better than Noryl plastic fittings.
Socket-connect flow switches bond to an unthreaded PVC pipe tee or pipe outlet with PVC cement and primer (not included).
IP65 rated switches seal out dust and can be lightly rinsed.
For technical drawings and 3-D models, click on a part number.
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 | |
Noryl Plastic Body with Noryl Plastic Fittings | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Socket Connection | |||||||||||||||
3/4 | __ | __ | 1 1/2 2 3 | 7.7 to 19.3 10.3 to 21 16.5 to 52 | 110 150 390 | 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 |
3/4 | __ | __ | 1 1/2 2 3 | 7.9 to 15 10 to 22 18 to 50 | 144 240 650 | 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 |
Noryl Plastic Body with Brass Fittings | |||||||||||||||
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 | 000000 |
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 |
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 |
Flow and Temperature Transmitters
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 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.
For technical drawings and 3-D models, click on a part number.
Pipe Connections | Flow Range, gph | End-to-End Lg. | Accuracy | Max. Pressure | Temp. Range, °F | Seal Material | Input Voltage | Plug Type | Mounting Orientation | Field Recalibratable | Each | |
One Digital Switch/Pulse Output and One 4-20mA Analog Transmitter/Digital Switch Output | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
316 Stainless Steel Body with 316 Stainless Steel Fittings | ||||||||||||
1 1/2 NPT Female | 60 to 3,000 | 6 3/16" | ±5% | 362 psi @ 70° F | 14° to 212° | Fluoroelastomer Rubber | 18 to 30V DC | 4-Pole Micro M12 | Any | Yes | 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.
For technical drawings and 3-D models, click on a part number.
Flow Range | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Connection | Gallons per Minute | Liters per Minute | End-to-End Lg. | Accuracy | Max. Pressure | Temp. Range, °F | Mounting Orientation | Input Voltage Range | Environmental Rating | Each | |
Two 4-20mA Analog Outputs—4-Pole Micro M12 Plug Connection | |||||||||||
316 Stainless Steel/Polybutylene Plastic/Thermoplastic Body with 316 Stainless Steel Fittings | |||||||||||
1 1/2 NPT Female | 1.3 to 79.3 gpm | 5 to 300 lpm | 6 11/16" | ±0.8% | 225 psi @ 70° F | 0° to 175° | Any | 20-30V DC | IP65, IP67 | 00000000 | 000000000 |