anchor.diff:  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,,
  
positive.code: General Electric Industrial Sensing,Druck PTX-1830,11777122,,
  General Electric Industrial Sensing,Druck PTX-1830,11847701,,
  General Electric Industrial Sensing,Druck PTX-1830,11847702,,
  Geospace Technologies Corporation,GS-11D seismometer,001,,
  Geospace Technologies Corporation,GS-11D seismometer,002,,
  Geospace Technologies Corporation,GS-11D seismometer,003,,
  
negative.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,,
  Hyquest,Tipping bucket rain gauge TB3 0.2mm,21-30,,
  Hyquest,Tipping bucket rain gauge TB3 0.2mm,21-32,,
  Hyquest,Tipping bucket rain gauge TB3 0.5mm,22-0043,,
  Hyquest,Tipping bucket rain gauge TB3 0.5mm,22-0044,,
  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,,
  