---
title: Why does my Sensor say Offline?
description: "Learn what to do when your sensor(s) show offline in the BarnTalk app.\nTemperature, humidity, wireless dry contact, water meter"
---

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# Why does my Sensor say Offline?

## The sensor tile will show offline for three reasons:

![image-1](https://support.barntools.com/hs-fs/hubfs/image-1.png?width=324&height=245&name=image-1.png)![image copy-1](https://support.barntools.com/hs-fs/hubfs/image%20copy-1.png?width=264&height=282&name=image%20copy-1.png)

1. The batteries need to be replaced or recharged.Temp and Humidity sensors batteries should be replaced every 12-18 months. 
     1. 1. Batteries can be purchased in bulk through [Amazon](https://www.amazon.com/dp/B003EOMVX8?ref_=cm_sw_r_cp_ud_dp_BMKRS5GGJSP3Z6H1GAA1&th=1) or individually through our [online store](https://barntools.com/products/battery-sensor). **Each sensor requires two batteries.**
     2. [Water meter batteries](https://support.barntools.com/en/knowledge/replacing-water-meter-batteries?hsLang=en) are covered for their first five years of use. Please contact support to learn more.
     3. Wireless Dry Contact & BinTalk Feed Sensor batteries are rechargeable.
2. The sensor is too far away from the gateway and cannot connect. 
     1. Follow these guidelines for [sensor antenna placement](https://support.barntools.com/en/knowledge/hc/en-us/articles/4409267236115-gateway-antenna-technical-specs?hsLang=en)
3. Sensor failure 
     1. If the above steps have been completed, please contact our support team for further troubleshooting assistance.

 

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