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The cesium used in our magnetometers is the non-radioactive elemental metal, isotope Cs 133. We employ approximately 120 to 240 micrograms of cesium metal in the sensor divided between the lamp and absorption cell. These are small glass ampules, each containing a volume of 1/32 to 1/16 of a cubic millimeter of cesium. If either or both the lamp and cell should break the cesium will instantaneously react with the air and moisture in the air to become Cs2O and/or CsOH. Both compounds are caustic but the quantity is so small that it is of no health concern. Finally, the lamp and the cell ampules are contained in a G10 housing that is then contained inside a sealed PVC housing. If the sensor should cease working due to a broken lamp and/or cell, it is not field repairable. Return the sensor to Geometrics for repair, replacement and/or disposal.

Our Cesium Magnetometer Product Certification discusses the hazardous Material status of our Cesium Magnetometers.

You will need to test the magnetometer on the dry deck or in your shop. Connect the G882 directly to the junction box and use the black power supply Geometrics provided. Verify operation. If working go to step 4. If the magnetometer is not working, then there is a hardware failure. There is nothing that can be done in the field at this point. Arrange to send it in by requesting an RMA number from our RMA page. If the magnetometer is working then "dies" it would be useful to have the data from the "diagnostic survey". Review this document: diagnostic Surveys for CM221 Counter Equipped Magnetometers r-2. Connect on board power supply (if different than the supply already checked) Verify operation. If it fails record diagnostic Survey. If working proceed. Connect Deck cable (if applicable). Verify operation. If it fails record diagnostic Survey. If working proceed. Connect Tow Cable. Verify operation. If it fails record diagnostic Survey. If working proceed. Deploy magnetometer under normal configuration. Begin a diagnostic Survey. If the mag doesn't work under tow then there is a problem with the tow cable/interconnections. Please take these steps and record the data when a failure occurs. (Best to record data all the time and then when it fails send the data to our Support Team, you can contact them through the support contact form. Make sure you are specific as to the conditions/configuration if/when it failed.)