Field work is easier when the sensor matches both the gas path and the handheld meter. The closed GGA housing includes a pressure connection for systems with overpressure, underpressure or dynamic pressure from gas flow, and can be screwed tightly into systems within the specified limits.
Used with a suitable GMH instrument pressure connection, the sensor port links directly to the instrument pressure port. This lets the actual pressure at the membrane be measured and compensated automatically, improving confidence when calibration and measurement conditions differ.
The family covers acidic and basic electrolyte versions for different oxygen tasks. GGA 370/570 supports 0.0 … 35.0 vol. % O2 and high CO2 concentrations; GGA 381/581 supports 0.0 … 100.0 vol. % O2 for low oxygen or concentrations above 35 vol.-% O2 where larger CO2 content is not present. Cable options up to 10 m give extra mounting flexibility.
GGA 370 and GGA 381 are for the GMH 369x series; GGA 570 and GGA 581 are for the GMH 569x series.
The housing is designed as a closed sensor with pressure connection and can be screwed into systems with small overpressure or underpressure within the specified pressure limits.
GOEL 370 uses acidic electrolyte for high CO2 concentrations. GOEL 381 uses basic electrolyte for low oxygen and use up to 100 vol.-% O2 without larger CO2 concentration.
The housing opens into two halves, allowing the sensor element to be exchanged with the O-ring and internal audio plug reassembled as described.
The sensor connection includes an integrated temperature sensor for use with the compatible GMH instrument series.
The housing has an M16 x 1 screw thread and can be connected to line tubes by means of an additional adapter.
