# Why is my depth sensor not working

**URL:** <https://discuss.bluerobotics.com/t/why-is-my-depth-sensor-not-working/4675>\
**Category:** QGroundControl\
**Created:** [March 23, 2019, 2:11pm UTC](https://discuss.bluerobotics.com/t/why-is-my-depth-sensor-not-working/4675 "2019-03-23T14:11:35Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![jjabraham](https://avatars.discourse-cdn.com/v4/letter/j/f08c70/32.png) [@jjabraham](https://discuss.bluerobotics.com/u/jjabraham)\
**Post date:** [March 23, 2019, 2:11pm UTC](https://discuss.bluerobotics.com/t/why-is-my-depth-sensor-not-working/4675/1 "2019-03-23T14:11:36Z")

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So i have my depth sensor attached to an 12c splitter and that goes to my pixhawk. I have a tempreture penetrator sensor aswell on that splitter. I’m apparently getting a tempreture reading from the sensor but when i am trying to do depth hold. It says that my depth sensor is not detected. What should i do and is this the right sensor for using depthhold.

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**Author:** ![jwalser](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/jwalser/32/2234_2.png) [@jwalser](https://discuss.bluerobotics.com/u/jwalser)\
**Post date:** [March 25, 2019, 4:35pm UTC](https://discuss.bluerobotics.com/t/why-is-my-depth-sensor-not-working/4675/2 "2019-03-25T16:35:44Z")

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> [@jjabraham](#):
>
> What should i do and is this the right sensor for using depthhold.

What depth sensor do you have?

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**Author:** ![jjabraham](https://avatars.discourse-cdn.com/v4/letter/j/f08c70/32.png) [@jjabraham](https://discuss.bluerobotics.com/u/jjabraham)\
**Post date:** [March 25, 2019, 5:29pm UTC](https://discuss.bluerobotics.com/t/why-is-my-depth-sensor-not-working/4675/3 "2019-03-25T17:29:32Z")

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i think i have the [Bar30 sensor](https://www.bluerobotics.com/store/sensors-sonars-cameras/sensors/bar30-sensor-r1/)

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**Author:** ![jjabraham](https://avatars.discourse-cdn.com/v4/letter/j/f08c70/32.png) [@jjabraham](https://discuss.bluerobotics.com/u/jjabraham)\
**Post date:** [March 25, 2019, 5:35pm UTC](https://discuss.bluerobotics.com/t/why-is-my-depth-sensor-not-working/4675/4 "2019-03-25T17:35:34Z")

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do you have to use a specific sensor to unlock the depth hold feature or can you just use any

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**Author:** ![jwalser](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/jwalser/32/2234_2.png) [@jwalser](https://discuss.bluerobotics.com/u/jwalser)\
**Post date:** [March 25, 2019, 10:31pm UTC](https://discuss.bluerobotics.com/t/why-is-my-depth-sensor-not-working/4675/5 "2019-03-25T22:31:25Z")

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It must be the bar30 or bar100 to work.

Please try to connect the bar30 directly to the pixhawk. Then, in the qgc application window menu bar, go to widgets → mavlink inspector → vehicle 1 and look for a row that says SCALED\_PRESSURE2. Take a screenshot of the rows that you have in the mavlink inspector.

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**Author:** ![jjabraham](https://avatars.discourse-cdn.com/v4/letter/j/f08c70/32.png) [@jjabraham](https://discuss.bluerobotics.com/u/jjabraham)\
**Post date:** [March 26, 2019, 12:55pm UTC](https://discuss.bluerobotics.com/t/why-is-my-depth-sensor-not-working/4675/6 "2019-03-26T12:55:50Z")

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i cant find a scaled\_pressure2 but i do have a scaled\_pressure row and a scaled\_pressure3 row