Table 4 Oxygen concentration meter used for measurement.
From: Surface oxygen concentration on the Qinghai-Tibet Plateau (2017–2022)
Time | Instrument | Working temperature | Working relative humidity | Range | Resolution |
|---|---|---|---|---|---|
2017 | CY-12C digital oxygen concentration meter | 0 °C–40 °C | 0%–90% | 0.0%–50.0% | 0.1% |
2018–2020 2021 2022 | TD400-SH-O2 portable oxygen concentration meter | −40 °C–70 °C | 0%–95% | 0.00%–30.00% | 0.01% |
