WS401-UMB Smart Weather Sensor for measuring of air temperature, relative humidity, precipitation and air pressure. Relative humidity is measured by means of a capacitive sensor element; a precision NTC measuring element is used to measure air temperature. Optionally, the WS401-UMB can be equipped with a leaf wetness sensor in addition. Precipitation is measured by tipping spoon and tipping bucket processes. The flexible tipping bucket allows a 0.2mm or a 0.5mm resolution of the rainfall. Measurement output can be accessed by the following protocolls: UMB-Binary, UMB-ASCII, SDI-12, MODBUS. One external temperature sensor is connectable.
Special features
- Aspirated temperature/humidity measurement
- Open communication protocol:
- UMB-ASCII
- UMB-Binary
- SDI-12
- MODBUS
- Analoge outputs in combination with 8160.UDAC
| Temperature | |
| Principle | NTC |
| Measuring Range | -50…60°C |
| Accuracy | ±0,2°C (-20°C… 50°C), otherwise ±0.5°C (>-30°C) |
| Relative Humidity | |
| Principle | Capacitive |
| Measuring Range | 0…100% RH |
| Accuracy | ±2% RH |
| Precipitation | |
| Resolution | 0.2mm / 0.5mm |
| Accuracy | ±2% |
| Air pressure | |
| Principle | MEMS Capacitive |
| Measuring range | 300…1200hPa |
| Accuracy | /- 0.5 hPa (0… 40°C) |
| General Information | |
| Protection type housing | IP66 |
| Interface | RS485, 2-wire, half-duplex |
| Operating Power Consumption | 12-24 VDC ±10% <4VA (without heating) |
| Operating Humidity Range | 0…100% |
| Operating Temperature Range | -50…60%°C |
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