| Parameter | Value |
| Model | BC21 |
| Weight | 210 g |
| Dimensions (height x width x depth) |
230 mm x 55 mm x 32 mm |
| Temperature | |
| Measuring range | -30 to 100 °C (-22 to 199 °F) |
| Accuracy | ± 1 °C (± 1.5 °F) |
| Measuring range resolution | 0.1 °C (0.1 °F) |
| Dew point temperature | |
| Measuring range: | -30 to 100 °C (-22 to 199 °F) |
| Accuracy | ± 1 °C (± 1.5 °F) |
| Measuring range resolution | 0.1 °C (0.1 °F) |
| Wet-bulb temperature | |
| Measuring range: | -30 to 100 °C (-22 to 199 °F) |
| Accuracy | ± 1 °C (± 1.5 °F) |
| Measuring range resolution | 0.1 °C (0.1 °F) |
| Humidity | |
| Measuring range: | 0 to 100 % RH (specified 5 to 95 % RH) |
| Accuracy | ± 2 % RH (at 25 °C and 5 to 95 % RH) |
| Measuring range resolution | 0.1 % RH |
| General technical data | |
| Measuring rate | 2.5 measurements per second |
| Response time | 10 seconds (90 % RH / 25 °C calm) |
| Operating temperature | 0 to 50 °C at < 80 % RH non-condensing |
| Storage temperature | -10 to 60 °C at < 80 % RH non-condensing |
| Power supply | 1 x 9 V battery |
| Device switch-off | After approx. 15 minutes of non-use |
High-quality sensors and a wide range of measurement functions make the BC21 the ideal climate measuring device for household, hobby and workshop applications. It precisely shows the relationship between temperature and humidity – crucial for assessing comfort climate as well as the risk of mould or corrosion. Thanks to integrated dew point and wet-bulb temperature measurement, the BC21 supports professional building climate evaluation and HVAC checks. Its shock- and bend-resistant stainless steel probe ensures reliable performance even under tough practical conditions.
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