# Flow on sensors **URL:** \ **Category:** Questions & Help\ **Created:** [March 1, 2022, 5:57pm UTC](https://community.homey.app/t/flow-on-sensors/61219 "2022-03-01T17:57:56Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![toch](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/toch/32/10995_2.png) [@toch](https://community.homey.app/u/toch)\ **Post date:** [March 1, 2022, 5:57pm UTC](https://community.homey.app/t/flow-on-sensors/61219/1 "2022-03-01T17:57:56Z")
Can someone help me create a “Flow” : If my water sensor / or one of my 3 pcs of fire sensors goes on alarm, then I want to turn on my Siren alarm. Similarly, if my door sensor goes into alarm, I want after a time delay of 30 seconds Siren alarm. ---
**Author:** ![Matrean](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/matrean/32/122480_2.png) [@Matrean](https://community.homey.app/u/Matrean)\ **Post date:** [March 1, 2022, 9:31pm UTC](https://community.homey.app/t/flow-on-sensors/61219/2 "2022-03-01T21:31:36Z")
Hi @toch, There’re multiple ways to do this. My first suggestion would be to first create a group of your sensors with the group app. Which can be found here: [\< groep \> | Homey](https://homey.app/nl-nl/app/com.swttt.devicegroups/<-group->/) Create a group of your sensors Then create a trigger that if the group sensor go in alarm you active your sirene Another thing which would be good to explore is the heimdall app. Which is a very comprehensive security app with a lot of build in security and alarming features without you having to build to much flows > **[Heimdall | Homey](https://homey.app/nl-nl/app/com.uc.heimdall/Heimdall/)** > > Verander uw Homey in een bewakingssysteem At the link below you can find more information on the configuration and features of that app > [@Heimdall - Let Homey watch over your home](https://community.homey.app/t/heimdall-let-homey-watch-over-your-home/134): > > This app enables you to use your Homey as a surveillance system. Supported languagesnetherlands Dutch uk English de German fr French it Italian sweden Swedish norway Norwegian es Spanish denmark Danish Links App Store: [Heimdall App for Homey | Homey](https://apps.athom.com/app/com.uc.heimdall) Github: [GitHub - daneedk/com.uc.heimdall: Heimdall for Homey](https://github.com/daneedk/com.uc.heimdall) issues: [GitHub · Where software is built](https://github.com/daneedk/com.uc.heimdall/issues) FAQ: [Heimdall - Let Homey watch over your home - #2 by DaneedeKruyff](https://community.homey.app/t/134/2) Change log: [Heimdall - Let Homey watch o…](https://community.homey.app/t/134/3) ---
**Author:** ![Peter\_Kawa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peter_kawa/32/173848_2.png) [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)\ **Post date:** [March 2, 2022, 1:14am UTC](https://community.homey.app/t/flow-on-sensors/61219/3 "2022-03-02T01:14:13Z")
Or - Smoke / flood sensors: If… (select top level zone, ‘Home’ in my case, and then) An alarm turned on (Now pick a sensor type, f.i. smoke sensor or flood sensor.) Then… Turn on Siren - Door: - - Flow1 If… Sensor Door X Alarm turned on Then… Start or replace timer A 30s - - Flow2 If… Sensor Door X Alarm turned off Then… Stop Timer A - - Flow3 If… Timer A has finished And… Door X alarm is on Then… Turn on Siren (I’m content with Chronograph as a timer app)