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A
B| Style | Model | Temp. Range | Relative Humidity Range | Carbon Dioxide Concentration | Power Source | Auto Power Off | Low-battery Indicator | Battery Voltage | Humidity Accuracy | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | R9905-NIST | - | - | - | - | - | - | - | - | £642.60 | RFQ
|
| B | R9905 | -4°F to +140°F | 0% to 100% | 0 ppm to 30000 ppm | Battery | Yes | Yes | 9V | 10% to 90% rh, -3% to 3% < 10% & > 90% rh, -5% to +5% | £390.15 |