The SRI TOGA (Transformer Oil Gas Analyzer) GC may be equipped with an HID detector TCD detector or both. The HID and TCD detectors are universal and can detect the entire spectrum of gases typically found dissolved in transformer oil: hydrogen oxygen nitrogen methane carbon monoxide carbon dioxide ethylene ethane and acetylene. For sub-ppm detection limits choose the HID detector. Excepting hydrogen the TCD can detect the target analytes down to 5-10ppm. For a 1-100% detection range for all of the analytes listed choose both detectors.
In the SRI TOGA GC the transformer oil sample is injected by syringe pump through a unique gas extraction loop. The extracted gases are then injected into the carrier gas stream by the dual 10-port valve injection system. The syringe pump accepts standard 50mL syringes. This means the sample can be loaded into the syringe from the transformer then into the syringe pump without ever being handled. This helps to protect the transformer oil sample from ambient contaminants.