anchor.diff:  General Electric Industrial Sensing,Druck PTX-1830,11777122,,
   General Electric Industrial Sensing,Druck PTX-1830,11847701,,
   General Electric Industrial Sensing,Druck PTX-1830,11847702,,
  +Geokon,Long Range Displacement Meter 4427,2129516,,
  +Geokon,Long Range Displacement Meter 4427,2129517,,
  +Geokon,Long Range Displacement Meter 4427,2129518,,
  +Geokon,Long Range Displacement Meter 4427,2129519,,
   Geospace Technologies Corporation,GS-11D seismometer,001,,
   Geospace Technologies Corporation,GS-11D seismometer,002,,
   Geospace Technologies Corporation,GS-11D seismometer,003,,
  
positive.code: Guralp Systems Ltd.,Fortis,TF1130,,
  Hydrological Services Pty Ltd,HS55 Bubbler WL100D,07-01,10974,
  Hyquest,Tipping bucket rain gauge TB3 0.2mm,08-201,,
  IESE Institute of Earth Science & Engineering,IESE HS-1-LT 2Hz,106,,
  IESE Institute of Earth Science & Engineering,IESE HS-1-LT Mini 4.5Hz,197,,
  IESE Institute of Earth Science & Engineering,IESE HS-1-LT Mini 4.5Hz,198,,
  
negative.code: Setra Systems Inc.,270-800/12V,1285389,,
  Setra Systems Inc.,270-800/12V,COVZ_255,,
  Setra Systems Inc.,270-800/12V,MIC_CAN,,
  Sisgeo,Wire Crackmeter D241,201412,,
  Sisgeo,Wire Crackmeter D241,201414,,
  Terra Technology Inc.,SSA-320,1324,,
  Thompson Sintra Pacific,Scout Hydrophone,H1,,
  Thompson Sintra Pacific,Scout Hydrophone,H2,,
  Thompson Sintra Pacific,Scout Hydrophone,H3,,
  Unidata Pty Ltd,Unidata 6541 Shaft Encoder - SDI,UENC 1008,14169,
  Vaisala,Weather Transmitter WXT535,001,,
  Vaisala,Weather Transmitter WXT535,S5320166,,
  Vaisala,Weather Transmitter WXT536,R2840106,,
  Vaisala,Weather Transmitter WXT536,S5310242,,
  Willmore,WILLMORE I,API_1,,
  Willmore,WILLMORE I,AUC_1,,
  Willmore,WILLMORE I,CAZ_1,,
  