SEM250 USB temperature and humidity recorder equipment power supply DC5V power supply or built-in battery power supply buffer capacity up to 260,000 sets of measurement range temperature probe built-in type -20~+60℃ external probe type -40~+80℃ humidity 0~100%RH measurement accuracy temperature general accuracy : 0.3°C (25°C).
SEM230A USB temperature and humidity recorder equipment power supply DC5V power supply or built-in battery power supply buffer capacity up to 260,000 sets of measurement range temperature probe built-in type -20~+60℃ external probe type -40~+80℃ humidity 0~100%RH measurement accuracy temperature general accuracy : 0.3°C (25°C).
| Power supply | DC5V power supply or built-in battery power supply | |
| Transmitter circuit working temperature and humidity | – 20℃～+60℃, 0%RH～95%RH non-condensing | |
| Recording capacity | 260,000 groups | |
| Recording interval | 5 seconds to 18 hours can be set | |
| Measurement update time | 2~255 seconds can be set | |
| Battery life | One full charge, the device can work continuously for one year The maximum number of battery charge and discharge cycles is 1200 times | |
| Measuring range | temperature | -20~+60℃ (internal probe) |
| -40~+80℃(external probe) | ||
| humidity | 0~100%RH | |
| Accuracy | temperature | ±0.3℃（25℃） |
| humidity | ±2%RH(60%RH,25℃) | |
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