THE GA500W MEASURES & DISPLAYS WOBBE INDEX ONLY. IT DOES NOT PROVIDE ANY ADDITIONAL DISPLAYS SUCH AS THE SPECIFIC GRAVITY OR CALORIFIC VALUE. (IF ADDITIONAL DISPLAYS ARE REQUIRE WE CAN PROVIDE OUR WC MODEL WHICH INCLUDES A DENSITOMETER) THE GA500W NEEDS TO BE INSTALLED INDOORS IN A TEMPERATURE CONTROLLED ROOM. THE TEMPERATURE SHOULD BE MAINTAINED AT 77°F +/- 5.4°F. THE UNIT MUST BE ACCESSIBLE FROM THE FRONT & THE BACK & THE HEIGHT OF THE CEILING MUST BE HIGHER THAN 9FT. WE PROVIDE THE UNIT WITH CASTERS THEREFORE IT NEEDS TO BE BLOCKED IN PLACED TO KEEP IT FROM MOVING. SERVICE CONNECTIONS INCLUDE ELECTRICITY, CALIBRATION GAS @ 15” WC, SAMPLE GAS @ 15”WC, INSTRUMENT AIR & A VENT LINE. ALGAS-SDI / SAM DICK INDUSTRIES Click Here to download the Algas-SDI Process Gas Calorimeter technical bulletin.