How to Add a Transmitter to a Mini SureSite


The below information will help explain how to add a transmitter to a Mini SureSite that didn’t have one when originally built at Gems.  The one caveat is that you must have a welded cap on either the top or bottom so there is room for the transmitter and junction box.    


Mini SureSite transmitters are clamped onto the stainless-steel housing so it is a simple install.  However, it is important to specify and order the correct transmitter, so it matches your existing SureSite correctly and indicates properly.  Also, on Mini SureSites they can only support either a switch or a transmitter, but not both.  The reason is because both the transmitter and switch modules need to be installed 180 degrees (opposite side) of the Flag Assembly.  There is not enough room for both to be placed in this location.  This ensures these sensors are in the correct orientation to receive the magnetism from the float.  If it is not within this orientation the reed switches within the transmitter or switch module may not close.  See the below image for further detail. 


First step is to determine your indication length, as this will dictate the transmitters length and p/n.  For ‘BM’ style Side-Side mounted units, it is the center to center dimension between those two side connections.  For other configurations you can measure the flag assembly and subtract 2” from this dimension, as we typically build the flag assemblies an inch longer on either end.  The distance between these two marks in inches will dictate how long we make the transmitter and the complete p/n.  For example, if your measurement is 36”, with the junction box at the bottom, the p/n will be 804605-036.  If your junction box was at the top, your p/n would be 808940-036.    


Next step is to decide which type of transmitter you can add to your SureSite.  Luckily there are only two that work with the Mini Suresite, and the only difference between them is the location of the junction box.  P/N 804605-XXX (XXX is indicating length in inches) will have the junction box at the bottom.  P/N 808940-XXX will have the junction box at the top of the SureSite.  See the below images detailing both.   




As mentioned above, you must have a welded cap at either the top or bottom connection.  This will ensure there is room for the junction box.  When transmitters are specified initially, we extend the stainless-steel housing (1.25” tubing) so there is still room when a flange is selected at the top or bottom.  If you have a welded cap at the bottom, you can select transmitter 804605, since the junction box is on the bottom.  If you have a welded cap for the top connection, you can select transmitter 808940 as the junction box is at the top. 


After receiving your transmitter, you will clamp it onto the housing and line the indication marks (blue and red) with your flag assembly indication points.  The blue indicates the bottom portion of the indicating level, and the red marks where the indication level stops.  ‘X’ shows the indication length below.

Once you have determined your p/n please contact Gems for pricing and availability.