At the urging of Coal Bed Methane well managers TMS, Inc., developed the LevelCom Gas Well Level Indicator (GWLI) an attractive alternative to the current methods of monitoring and controlling water levels in Coal Bed Methane wells.

The LevelCom Gas Well Level Indicator (GWLI) was introduced to the industry at the 2004 CBM Fair in Gillette, WY.  Based on it's successful tank level indicator LevelCom 100, the GWLI utilizes pulses of nitrogen in the down well purge lines to determine the water level.  TMS engineered the instrument with clever and miserly use of the nitrogen supply which provides 3-4 months of operation between gas cylinder changes when an 80 cu ft cylinder is used.

When equipped with a 4-20mA output, ModBus RTU communications and dual form-C (SPDT) relays the LevelCom GWLI provides local control function and interfaces to any telemetry system.  SymCom, Inc. has modified it's popular RM-2000 CBM Plus Remote Monitor to communicate directly with the GWLI to provide a more accurate and robust pump control system.  Data available from the GWLI includes water level, annulus gas pressure, nitrogen supply pressure and error reports.

Using 2 way telemetry the well operators now have the ability to remotely sample the water level using the UPDATE feature in the GWLI.  Used in this way the nitrogen cylinder life at a well site can stretch out to several months. 

Download GWLI Data Sheet