--- title: Installation Guides - Tank Monitors  description: Installation Guides - Tank Monitors  --- [Skip to content](https://help.hilomonitoring.com/installation-guides-tank-monitors-#main-content) [![hilo-white-text](https://help.hilomonitoring.com/hs-fs/hubfs/hilo-white-text.png?width=173&height=60&name=hilo-white-text.png)](https://hilomonitoring.com/nz) Open main navigation Close main navigation - [Contact us](https://www.hilomonitoring.com/nz/company/contact-us) [Contact us](https://www.hilomonitoring.com/nz/company/contact-us) How can we help you? - There are no suggestions because the search field is empty. 1. [Help Center](https://help.hilomonitoring.com/?hsLang=en) 2. [Water Tank Monitors](https://help.hilomonitoring.com/water-tank-monitors?hsLang=en) # Installation Guides - Tank Monitors  [HiLo T35 Setup Guide Wifi](https://help.hilomonitoring.com/hubfs/Public%20User%20Guides/HILO%20T35%20Setup%20Guide%20Wifi%20v1.0.pdf?hsLang=en) [HiLo T35 Setup Guide 4G](https://help.hilomonitoring.com/hubfs/Public%20User%20Guides/HILO%20T35%20Setup%20Guide%204G%20v1.0.pdf?hsLang=en) Tools you'll need: To give your sensor a clear view of the water in your tank, you'll need to drill a 50 - 60mm hole in your tank. This is a standard size drill bit available from your local hardware store. ![](https://help.waterwatch.io/3.0.1/~gitbook/image?url=https%3A%2F%2F3663084420-files.gitbook.io%2F%7E%2Ffiles%2Fv0%2Fb%2Fgitbook-x-prod.appspot.com%2Fo%2Fspaces%252FUHGkYdZf2x89OKqHUwwA%252Fuploads%252F3CihZUingMBRtnqGTclQ%252FTank-Setup-1%2520%281%29.png%3Falt%3Dmedia%26token%3D6b55a08f-af73-4e79-926c-911077238119&width=768&dpr=4&quality=100&sign=600e9392&sv=2) Open the mobile app and begin the set up wizard, you'll need to be at your tank to follow these steps. ![](https://help.waterwatch.io/3.0.1/~gitbook/image?url=https%3A%2F%2F3663084420-files.gitbook.io%2F%7E%2Ffiles%2Fv0%2Fb%2Fgitbook-x-prod.appspot.com%2Fo%2Fspaces%252FUHGkYdZf2x89OKqHUwwA%252Fuploads%252Fm9Do72yQBbpxBD7efnTr%252FTank-Setup-2A.png%3Falt%3Dmedia%26token%3D20f9a2d2-88a6-4a05-9533-28b0d0302572&width=768&dpr=4&quality=100&sign=6552ebb0&sv=2) **The setup wizard will help you to:** -  Connect to the tank monitor with Bluetooth -  Drill a 50 - 60mm hole in your tank -  Take measurements -  Attach your tank monitor to the tank -  Verify your first measurements ### Tank Positioning ![](https://help.waterwatch.io/3.0.1/~gitbook/image?url=https%3A%2F%2F3663084420-files.gitbook.io%2F%7E%2Ffiles%2Fv0%2Fb%2Fgitbook-x-prod.appspot.com%2Fo%2Fspaces%252FUHGkYdZf2x89OKqHUwwA%252Fuploads%252F9wjWKg3FBTHxdzLCtzNi%252FTank-Positioning---1.png%3Falt%3Dmedia%26token%3Dbf5cb60c-936b-4925-91e6-931d2c364c78&width=768&dpr=4&quality=100&sign=7af07fc3&sv=2) -  The tank monitor should be installed at least **300mm** above the highest possible water level. **200mm** is the minimum measurable distance above the highest water level. -  You will need to drill a 50mm hole in the tank. -  The monitor should be as close to level as possible, at no more than a three degree angle. Mounting shims are available if your tank has a curved top.   If you have a Devan tank, mount the monitor off center. These tanks have metal in the center. Ensure that there are no obstructions directly under your chosen mounting position such as ball cocks, inflow and outflow pipes. ![](https://help.waterwatch.io/3.0.1/~gitbook/image?url=https%3A%2F%2F3663084420-files.gitbook.io%2F%7E%2Ffiles%2Fv0%2Fb%2Fgitbook-x-prod.appspot.com%2Fo%2Fspaces%252FUHGkYdZf2x89OKqHUwwA%252Fuploads%252FXaglsx6h4zPoKmmahxJZ%252FTank-Positioning---2.png%3Falt%3Dmedia%26token%3D0c1ae6a8-ce07-4203-a039-796268a32909&width=768&dpr=4&quality=100&sign=7200941d&sv=2) ##### **Plastic tanks** The best installation spot is on the center of the tank roof. This is usually the highest point and allows a clear view to the water surface. If you have a Devan tank, mount the monitor off center. These tanks have metal in the center. ##### **If the center of the tank is not flat, there are alternative options:** ![](https://help.waterwatch.io/3.0.1/~gitbook/image?url=https%3A%2F%2F3663084420-files.gitbook.io%2F%7E%2Ffiles%2Fv0%2Fb%2Fgitbook-x-prod.appspot.com%2Fo%2Fspaces%252FUHGkYdZf2x89OKqHUwwA%252Fuploads%252FoWKpcp1o9VviUGGS7r8J%252FTank-Positioning---3%2520%282%29.png%3Falt%3Dmedia%26token%3D4df2bb37-1f2c-4d3d-848d-9f602c45f4e1&width=768&dpr=4&quality=100&sign=436233cd&sv=2) The monitor can be installed on the tanks access lid. This is not the best position as false alarms can be triggered if you happen to remove the tank lid for inspection. As with concrete tanks, the monitor can be installed high (but off center) using the mounting shims for leveling. ![](https://help.waterwatch.io/3.0.1/~gitbook/image?url=https%3A%2F%2F3663084420-files.gitbook.io%2F%7E%2Ffiles%2Fv0%2Fb%2Fgitbook-x-prod.appspot.com%2Fo%2Fspaces%252FUHGkYdZf2x89OKqHUwwA%252Fuploads%252FPx1oPV3b73pADNhPDm8V%252Fplatic-tank-with-shims.jpg%3Falt%3Dmedia%26token%3D5c157a89-acc0-4637-a3cf-706ce868d9a1&width=768&dpr=4&quality=100&sign=74094f8&sv=2) ##### **Concrete tanks** Mounting high (but off center) using the mounting shims is the standard method for installation on concrete tanks. Some customers prefer replacing the inspection lid with timber to attach the monitor. ![](https://help.waterwatch.io/3.0.1/~gitbook/image?url=https%3A%2F%2F3663084420-files.gitbook.io%2F%7E%2Ffiles%2Fv0%2Fb%2Fgitbook-x-prod.appspot.com%2Fo%2Fspaces%252FUHGkYdZf2x89OKqHUwwA%252Fuploads%252FeWedbe5aYiJdxZ9baaqW%252Fconcrete-tank.jpg%3Falt%3Dmedia%26token%3D62201958-bc2f-4417-acd3-153b6817b358&width=768&dpr=4&quality=100&sign=4f5ccaf7&sv=2)   - [Water Tank Monitors](https://help.hilomonitoring.com/water-tank-monitors?hsLang=en) - [Scientific Range Monitors](https://help.hilomonitoring.com/scientific-range-monitors?hsLang=en) - [Using the HiLo Mobile](https://help.hilomonitoring.com/using-the-hilo-mobile?hsLang=en) - [Troubleshooting and Support](https://help.hilomonitoring.com/troubleshooting-and-support?hsLang=en#main-content) - [Getting Started](https://help.hilomonitoring.com/troubleshooting-and-support?hsLang=en#getting-started) - [HiLo Web App](https://help.hilomonitoring.com/troubleshooting-and-support?hsLang=en#hilo-web-app) - [Billing, Subscription & Warranty](https://help.hilomonitoring.com/billing-subscription-warranty?hsLang=en) - [EX Rated Products](https://help.hilomonitoring.com/ex-rated-products?hsLang=en) - [Advanced Users](https://help.hilomonitoring.com/advanced-users?hsLang=en) Copyright © 2026, HiLo Level Monitoring