- “Universal” Detector
- Detects from 100% Down to 200-500ppm
- Easily Replaceable Filaments
- Thermostatted up to 275°C
Because it detects all molecules, the Thermal Conductivity Detector is commonly used for fixed gas analysis (O2, N2, CO, CO2, H2S, NO, NO2, etc.) where the target analytes do not respond well on other, more sensitive detectors. The TCD can detect concentrations from 100% down to around 100ppm on a flat baseline with sharp peaks. Where the peak is broad or the baseline is not perfectly flat, detection limits of 300 ppm are more realistic. For lower detection limits, the HID may be more suitable for inorganics, and the FID provides 1ppm detection for hydrocarbon species.