For more information visit Sensor Accessory Page: TMA-34N (SR-TANK-MOUNT-34NPT)


Rheonics TMA-34N - Tank Mount Adapter

Rheonics inline density meter and viscometers can be installed in a tank using the convenient tank-mount adapters (TMA). The tank-mount adapters work with both SRV and SRD product lines.


The TMA-34N is designed for the SRV and SRD with 3/4" NPT connection (SR-X1-34N). This accessory works both as a protection cage and as an easy adapter for open tanks installations from the top. The TMA is immersed as much as needed in the tank using a custom pipe or pole.


Using the correct adapter, the sensor electronics (SME-TRD or SME-TR) can also be mounted at the top of the TMA pole or the sensor cable can be run to electronics mounted elsewhere or in a cabinet box (SME-DRM).


Picture below shows various components of the tank mount system:



Field installation photos showing SRD mounted in a mud pit on a drilling rig:




Components of a Rheonics TMA-34N

Next image shows the components of the TMA-34N.

CAUTION: Only SRV or SRD with 3/4" NPT process connection can be used with this tank-mount adapter (TMA-34N).



Close-up of sensor and tank-mount adapter:



You will also need a O-ring to create a seal between the sensor and the tank-mount adapter.



Steps to install the sensor in the tank-mount adapter


Step 1: Insert O-ring into the groove inside the Protective cage - back:


Ensure the O-ring sits inside the groove. This is important to avoid any leak from the fluid side into the extension pipe. The seal is not designed to withstand pressures above 2-3 bar (30-45psi). Do not use in pressurized environment, contact Rheonics support if you need to install in high pressure environments.


O-Ring installation video:



Step 2: Run sensor cable through the Protective cage - back:



Step 3: Connect sensor cable to the sensor (SRV or SRD).



Step 4: Align the HEX key on the sensor and fit into the Protective cage - back.



Step 5: Insert Protective cage - FRONT aligning the screw holes



Step 6: Tighten the screws to firmly connect the front of the Protective cage to the Back



Now the sensor is firmly mounted in the tank-mount adapter.


To install it in a tank, you will now need a pipe/pole with 3/4"NPT threaded end to connect to the tank mount adapter. Use teflon tape on the NPT thread to ensure seal against fluid ingress.


Extension pipe/pole is not supplied by Rheonics and should be sourced locally. Standard 3/4" NPT threaded end is needed on at least one side to connect to the tank-mount adapter. Alternatively, one can connect a pipe adapter to connect 1" pipe or another dimension pipe.


Warning


Customer needs to ensure that the O-Ring is properly sealing between the TMA and the back of sensor body, and that the NPT thread on the TMA is properly sealed against the rod.


Next image shows the sealing requirements for the TMA-34N installation. A poor sealing of the O-Ring or the Teflon tape around the NPT thread of custom pipe can lead to fluid leakage inside, thus potentially affecting the sensor cable and probe. 



How to use the tank mount adapter with an EX rated sensor (SRV/SRD)?


The process of making the connection is the same and the tank mount adapter is same.

The sensor cable and connectors area little bigger than standard cable and connector. However the adapter is designed so the bigger connectors will still pass through.


Care must be exercised to ensure there is no damage to the cable or connector when passing it through the pipe which is connected to the tank mount adapter. As the pipe is sourced by the customer to their desired length, it is important that you check the ends to ensure there are no burrs which can damage the cable and the ID is large ehough for the cable connector to pass through.


Review all Rheonics cable variants, including the EX cable here.


The pictures below show the tank mount adapter with a EX sensor cable, connector and sensor.



Steps are described above, so these are only shown below pictorially:





Protective cage back view to show the connector and pipe connection and the cable running through pipe and into the protective cage.



Troubleshooting

  • Cable connection - remove the front of the protective cage, loosen cable gland at top of the pipe and then slide the sensor and cable out. Check connector is firmly tightened (hand-tighten).


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