Replace Desiccant

Each G2-RAIN ships with a bag of desiccant placed underneath the data logger circuit boards. This desiccant bag should be replaced whenever:

  1. The G2-RAIN-RTU enclosure is opened.
  2. The Internal Humidity diagnostic parameter reads 40% or greater.

Any appropriately sized desiccant pack (the included pack is 2.8″x 1″ for reference) can be used as a replacement.


Desiccant Replacement Process

  1. If the G2-RAIN is utilizing an internal battery, remove power from the system by using a flat head screwdriver to turn the powerplug counter-clockwise until the top of the plug is above the RTU plate.
    1. If the G2-RAIN is powered through an external connection with a solar panel, ensure to unplug the G2-RAIN before beginning this process.

Disconnect power before continuing


  1. Using a 3/16″ hex head driver, remove the (4) bolts on top of the G2-RAIN-RTU enclosure.

Remove the four enclosure bolts


  1. Carefully set down the G2-RAIN PCB in a manner that does not harm the PCB, the internal battery pack, the external cable or the antenna.
    1. Remove the antenna completely for easier handling.

The example above shows the G2 PCB resting diagonally on the G2-RAIN-RTU bulkhead.


  1. Locate the desiccant in between the PCB and the top G2-RAIN plate.

The desiccant rests above the PCB and below the top G2-RAIN plate.


  1. Using a pair of tweezers, carefully remove the desiccant.
    1. It is recommended to remove the desiccant in the open space on the opposite side of the SD card holder as there are no wire obstructions.

Use tweezers to remove the desiccant.

Locate the opening opposite of the SD card holder.


  1. Reinsert a fresh desiccant into the same opening as above.
    1. Stop and reposition the desiccants’ entry if it is difficult to insert the desiccant.

Insert the fresh desiccant into the same opening.


  1. Carefully reinsert the G2-RAIN PCB into the enclosure while ensuring that no wires are caught between the PCB plate and the enclosure.


  1. Use the hex head driver and bolts in step 2 to seal the enclosure.