How do I install a flow sensor? (Generation 2)

Flow sensors monitor the actual flow of water running through a pipe; this allows the controller to record and report your sprinklers water consumption in gallons.

BETA FEATURE

When enabled, the observed flow data will simply override the predicted water use reports in the Rachio app.

IN THIS ARTICLE

Flow Sensor Compatibility

The Rachio 2nd Generation Smart Sprinkler Controller is compatible with the following flow sensors:

Badger

  • 228PV15
  • 228PV20

CST

  • FSI-T10-001
  • FSI-T15-001
  • FSI-T20-001

Toro

  • TFS-050
  • TFS-075
  • TFS-100
  • TFS-150
  • TFS-200
RACHIO GENERATION 1 DOES NOT SUPPORT FLOW SENSORS

Rachio's 1st Generation Smart Sprinkler Controller is not compatible with wired flow sensors.

Go to Top ^

Flow Sensor Installation

To connect a flow sensor to your Rachio 2nd Generation controller, please see the wiring diagram below (note the red & black wires MUST be installed correctly for the data to send to the controller correctly):

NOTE: Either terminal "S1" or "S2" can be used for the flow sensor. Configuration in the app allows you to assign a rain sensor or a flow sensor to either terminal.
Go to Top ^

How to enable a Flow Sensor

To configure the flow sensor in the Rachio app, please follow the steps below:
1
From the dashboard screen, tap on Device Settings
2
Tap Advanced
3
Select the sensor terminal you wish to configure; in this example "Sensor 1"
4
Enable the sensor & select the type of sensor you're adding; in this case "Flow"
5
Select your flow sensor from the list.
Go to Top ^

?

How do I know if my Flow Sensor is working?

The best way to determine whether your flow sensor is working is to compare water usage measurements before and after the sensor is selected to verify they’re different.
To verify, follow these steps:
1
Find your current water usage for the month at the bottom of the dash. Write this number down to use later.
2
Be sure the flow sensor is NOT yet selected in your advanced device settings.
3
Run a 5 minute manual zone run of any single, non-drip zone. If all you have is a drip zones, then you may want to run for 10 minutes or longer.
4
After the manual run has completed, check your water usage again. Write this number down to use later. Calculate your estimated usage as follows:
Estimated Water Usage = Usage from Step 4 - Usage from Step 1
5
Now, go into your advanced device settings and select your flow sensor on the appropriate sensor port.
6
Run another 5 minute manual zone run on the same zone as from Step 3. Note, if you ran longer than 5 minutes, be sure to run the same amount of time as you did in Step 3.
7
After the manual run has completed, check your water usage again. Write this number down. Calculate your actual water usage as follows:
Actual Water Usage = Usage from Step 7 - Usage from Step 4
If your Estimated Water Usage is different from your Actual Water Usage, then your flow sensor is measuring flow!
Go to Top ^

?

What if my usage reports seem high?

If your water usage seems high after connecting a flow sensor, the likely culprit a wiring error or faulty wire. You can follow these steps to debug the issue.
NOTE: This test will require a multi-meter to debug.
If all zone runs are measuring high usage:
  1. Set your multimeter to measure resistance.
  2. Measure the resistance between the C and SC ports on the controller. If this resistance is below 1k ohms, you have a short circuit between C and SC which needs to be disconnected.
  3. Measure the resistance between C and S1 or S2, whichever has your flow sensor connected. If this resistance is below 1k ohms, you have a short circuit between C and S1/2 which needs to be disconnected.
If only one zone run is measuring high usage:
  1. Set your multimeter to measure resistance.
  2. Measure the resistance between the zone number that’s failing and SC ports on the controller. If this resistance is below 1k ohms, you have a short circuit which needs to be disconnected.
  3. Measure the resistance between the zone number that’s failing and S1 or S2, whichever has your flow sensor connected. If this resistance is below 1k ohms, you have a short circuit which needs to be disconnected.
Go to Top ^

?

Why aren't my drip zones recording flow?

There is a lower limit to all flow sensors. If your drip zone is below this limit, your Rachio controller cannot measure any flow and will revert to estimated usage. You can find the limits of each flow sensor below:

Toro

CST

Still need help? Contact Us Contact Us