
Add an extra level of security and peace of mind to your irrigation system with these reliable, easy-to-use flow sensors—all fully compatible with the ESP-LXD Decoder Controller or ESP-LXMEF Controller and IQ™ v2.0 Central Control.
Rain Bird® Flow Sensors send flow data to central control or stand-alone control systems for precise and accurate flow monitoring. Choose from a variety of sizes, operating ranges and types for the solution that best meets your needs.
Simple six-bladed impeller design
The ESP-LXMEF features a standard Flow Smart Module™ for flow learning, logging and problem reaction. Flo-Watch™ protection monitors high and low flow conditions with user-defined reactions. Learn more about the ESP-LXMEF Controller.
Combine the Flow Sensors with the ESP-LXD Controller to deliver precise flow sensing for larger commercial sites. Expandable for up to 200 stations, ESP-LXD combines Extra Simple Programming with an efficient 2-wire path. Flow Management is built in to every ESP-LXD. Learn more about the ESP-LXD Decoder Controller.
Brass Tee’s
Plastic Tee’s
Inserts
Pulse Transmitters
The following table indicates the suggested flow range for Rain Bird Flow Sensors. Rain Bird Sensors will operate both above and below the indicated flow rate. However, good design practice dictates the use of this range for best performance. Sensors should be sized for flow rather than pipe size.
Rain Bird Flow Sensor Operating Ranges |
||||
Model |
Description |
Suggested Operating Range |
Suggested Operating Range |
Suggested Operating Range |
FS050P |
1/2" PVC T Flow Sensor |
1.9 - 18.9 |
7.2 - 71.7 |
0.43 - 4.3 |
FS075P |
3/4" PVC T Flow Sensor |
3.3 - 33.2 |
12.6 - 125.8 |
0.75 - 7.5 |
FS100P |
1" PVC T Flow Sensor |
5.4 - 53.9 |
20.4 - 204 |
1.2 - 12.2 |
FS150P |
1 1/2" PVC T Flow Sensor |
5 - 100 |
18 - 378 |
1.1 - 22.7 |
FS200P |
2" PVC T Flow Sensor |
10 - 200 |
36 - 756 |
2.3 - 45.4 |
FS300P |
3" PVC T Flow Sensor |
20 - 300 |
78 - 1134 |
4.5 - 68.1 |
FS400P |
4" PVC Tee Flow Sensor |
40 - 500 |
150 - 1890 |
9.1 - 113.6 |
FS100B |
1" Brass T Flow Sensor |
2 - 40 |
6 - 150 |
0.5 - 9 |
FS150B |
1 1/2" Brass T Flow Sensor |
2 - 82.6 |
6.3 - 313 |
0.4 - 18.7 |
FS200B |
2" Brass T Flow Sensor |
4.9 - 294 |
18.5 - 1112 |
1.1 - 66.7 |
FS350B |
Brass Insert Flow Sensor |
12 - 45000* |
48 - 168000* |
2.7 - 10200* |
FS350SS |
Stainless Steel |
12 - 45000* |
48 - 168000* |
2.7 - 10200* |
*Depends on pipe size and material
The following table indicates the K Value and Offset for Rain Bird Flow Sensors.
Rain Bird Flow Sensor K Value and Offset |
|||
Model |
Description |
K Value |
Offset |
FS050P |
1/2" PVC T Flow Sensor |
0.078 |
0.9 |
FS075P |
3/4" PVC T Flow Sensor |
0.1563 |
0.9 |
FS100P |
1" PVC T Flow Sensor |
0.261119 |
1.2 |
FS150P |
1 1/2" PVC T Flow Sensr |
1.848 |
0.227 |
FS200P |
2" PVC T Flow Sensor |
2.725 |
0.392 |
FS300P |
3" PVC T Flow Sensor |
8.309 |
0.227 |
FS400P |
4" PVC Tee Flow Sensor |
15.35 |
0.248 |
FS100B |
1" Brass T Flow Sensor |
0.41447 |
0.41447 |
FS150B |
1 1/2" Brass T Flow Sensor |
1.06526 |
0.0892 |
FS200B |
2" Brass T Flow Sensor |
2.747 |
0 |
FS350B |
Brass Insert Flow Sensor |
Depends on Pipe Size |
|
FS350SS |
Stainless Steel |
Depends on Pipe Size |
|
NPT Flow Sensors Tech Specs (PDF: 406 KB)
BSP Flow Sensors Tech Specs (PDF: 231 KB)
Learn about Flow Sensor benefits, features, dimensions, and other key information, including how to specify.

Learn everything you need to know about the ESP-LX Series, including features, benefits and how to install, so you can use this innovative technology to grow your business.
Learn everything you need to know about the ESP-LX Series, including features, benefits and how to install, so you can use this innovative technology to best meet your irrigation needs.
"What I like best about the ESP-LXD controller is the fact that it's very user-friendly…a very simple interface with the dial and very minimal button usage. It gives you every bit of information you want in just a few turns."
Mark Lung
Senior Project Manager
Weigelt Enterprises
"Rain Bird has designed the user interface of their ESP-LXME controller to be logical and it's easy to find key features such as flow management parameters and zone flow rates. It's also easy to write a program and monitor flow."
Chris Le Conte
President
Smart Watering Systems, Inc.
"The IQ v2.0 system has been a very effective system in helping our clients reduce their water use and allowing us to manage their irrigation."
Chris Le Conte
President
Smart Watering Systems, Inc.
"Rain Bird products like IQ v2.0 continue to be the highest quality commercial irrigation products on the market. With Rain Bird, the guesswork is eliminated through extremely well-thought-out products. And even though the products are designed to be simple to use, Rain Bird's service is there to back you up every step of the way."
Dwayne Willis
Supervisor II
Miami Dade County Public Schools