The WB-2 Wet Bulb Temperature Sensor delivers precise psychrometric measurements essential for calculating relative humidity, enthalpy, and thermal comfort indices. Featuring an automatically wetted wick system with distilled water reservoir, it provides accurate wet bulb readings in HVAC systems, weather stations, and industrial processes. With ±0.3°C accuracy, IP67-rated housing, and freeze protection, it operates reliably from -20°C to +80°C. Compatible with all major data loggers via analog or digital outputs. Ideal for thermal stress monitoring, greenhouse control, and meteorological research.
Advanced Psychrometric Measurement
The WB-2 sensor employs the fundamental psychrometric principle to measure wet bulb temperature - a critical parameter for determining air humidity properties. Its precision thermometer and continuously wetted cotton wick maintain perfect evaporation conditions, enabling accurate humidity calculations even in rapidly changing environments.
Engineered for Critical Applications
Designed with an integrated water reservoir and automatic wicking system, the WB-2 ensures consistent measurements without manual intervention. The freeze-protected housing prevents damage in sub-zero conditions, while the radiation shield minimizes solar interference for meteorological-grade accuracy in outdoor installations.
Smart System Integration
With configurable 4-20mA, 0-5V, or Modbus RTU outputs, the WB-2 seamlessly integrates with building management systems and environmental monitoring networks. The low-maintenance design features a large 200ml water reservoir providing up to 30 days of autonomous operation.
Key Advantages
- Automatic wicking system maintains optimal wet bulb conditions
- Integrated freeze protection for sub-zero operation
- Large 200ml reservoir minimizes maintenance frequency
- Radiation shield reduces solar measurement error
- Medical-grade cotton wick for consistent evaporation
- NIST-traceable calibration included
Operation & Maintenance Guidelines
- Use only distilled water to prevent mineral buildup
- Replace wick every 3 months in continuous operation
- Maintain water reservoir between 20-80% capacity
- Verify calibration annually with sling psychrometer
- Install in well-ventilated area away from heat sources
| Parameter | Specification |
|---|---|
| Measurement Range | -20°C to +80°C (wet bulb) |
| Accuracy | ±0.3°C (@25°C) |
| Resolution | 0.1°C |
| Response Time (τ63%) | < 60 seconds |
| Wick Material | Medical-grade cotton |
| Water Reservoir | 200ml (standard) |
| Freeze Protection | Active heating below 1°C |
| Output Signals | 4-20mA, 0-5V, Modbus RTU |
| Power Supply | 12-30V DC (1.5W heating load) |
| Ingress Protection | IP67 |
| Cable Length | 5m (extendable to 100m) |
| Brand | LSI-Lastem |
