How to Replace a Non-EP Transmitter on a Standard Alloy SureSite


The below information will help explain how to replace a Non-Explosion Proof (standard) transmitter on a Standard Alloy SureSite visual level indicator.  Only proceed to this step if you’ve determined the transmitter is faulty by going through the troubleshooting steps.  One important thing to remember is that Standard transmitters must be installed 90 degrees from the flag assembly.  If it is not within this orientation the reed switches within the transmitter 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 ‘BA’ 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.  You can also measure between the red and blue indicating marks on the transmitter as this will be the indication length.  See the below image.


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”, the p/n will be 85875-036.  This will include the 36” long transmitter with 24” cable length.  If you require a longer cable length on the transmitter, the p/n would be 85875-036-XX, where ‘XX’ is length in inches.    If during your troubleshooting steps you’ve determined that just the transmitter is faulty, then the 85875-XXX will be the only component you need. 


If you determine that the 4-20mA signal conditioner is also faulty you can order the junction box kit, p/n 86158 also, which will include the junction box and 4-20mA signal conditioner. 


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


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.  Once again make sure it is 90 degrees from the flag assembly.