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Temp & Humidity Sensors
NBL-W-LBTH high-precision air temperature, humidity, and atmospheric pressure sensor. This article details its three-in-one monitoring advantages, RS485 Modbus communication protocol, and wide applications in meteorological observation, smart agriculture, and industrial environmental monitoring, providing you with professional environmental perception solutions.
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In the wave of digital transformation, the perception of the natural environment is no longer limited to single-dimensional measurements. Air temperature, relative humidity, and atmospheric pressure are the three core parameters that determine local climate microcirculation. The NBL-W-LBTH three-in-one sensor meticulously developed by NiuBoL integrates these three key indicators into a compact and robust industrial-grade housing.
This highly integrated design not only reduces hardware costs for system integration but also ensures high synchronization of data in both time and space dimensions. Whether for meteorological early warning, refined farmland management, or laboratory constant temperature and humidity control, the NBL-W-LBTH is the ideal choice for building a reliable monitoring network.

In industrial-grade monitoring, data accuracy is the lifeline of decision-making. NiuBoL sensors undergo rigorous calibration processes to ensure each indicator reaches industry-leading levels.
Temperature Measurement: Range covers -40 ℃ to 80 ℃, accuracy up to ±0.5 ℃, resolution of 0.1 ℃. Stable output in extreme cold northern borders or hot industrial greenhouses.
Humidity Measurement: Supports full-range 0–100% RH monitoring, accuracy error controlled within ±5% RH, resolution of 0.1% RH, capable of precisely capturing subtle water vapor changes in the air.
Atmospheric Pressure Measurement: Wide measurement range covering 10–1200 hPa, accuracy of ±1.5 hPa, resolution of 0.1 hPa. This gives the device extremely high reference value in areas with significant altitude variations.
Power Supply System: Standard DC 12V–24V wide voltage input, compatible with most industrial control systems and solar power solutions.
Signal Output: Provides industrial standard RS485 (Modbus-RTU protocol) or 4–20 mA analog current output, with strong anti-interference capability and support for long-distance transmission.
Adaptability: The entire unit can operate continuously long-term in -40~80 ℃ and 0~100% RH environments.

| Parameter | Specification |
|---|---|
| Temperature measurement | - Measuring range: -40 ℃~80 ℃ - Accuracy: ±0.5 ℃ - Resolution: 0.1 ℃ |
| Humidity Measurement | - Measuring range: 0~100% RH - Accuracy: ±5% RH - Resolution: 0.1% RH |
| Barometer Measurement | - Measuring range: 10~1200 hPa - Accuracy: ±1.5 hPa - Resolution: 0.1 hPa |
| Power supply | Optional: DC 12V–24V or other (please consult customer service) |
| Output | RS485 or 4–20 mA |
| Working environment | - Operating temperature: -40~80 ℃ - Relative humidity: 0~100% RH |

The NiuBoL NBL-W-LBTH features a unique sensing end protection design. The high-sensitivity capacitive humidity unit and thermistor (NTC) integrated inside are protected by special coatings, effectively preventing damage from condensed water, dust, and mildly corrosive gases to the sensing elements.
Using the RS485 communication interface with the MODBUS-RTU protocol is the preferred solution for modern smart agriculture and industrial IoT. Compared to traditional analog signals, digital signals experience no accuracy degradation over hundreds of meters of transmission, and one gateway can connect multiple NiuBoL sensors, greatly simplifying wiring complexity.
Thanks to the internally optimized fluid dynamics airway design, ambient air can quickly exchange with the internal sensing elements, giving the NBL-W-LBTH extremely fast response time (T90). At the same time, batch production consistency ensures high comparability of data across different points in large-scale monitoring station groups.

In meteorological stations, temperature, humidity, and pressure are the foundation of weather forecasting. NiuBoL sensors provide high-frequency real-time data for climate modeling, helping meteorologists predict paths of heavy rain, drought, or typhoons.
Crop growth, pollination, and pest outbreaks are closely related to temperature and humidity. With the NBL-W-LBTH, farmers can automatically control greenhouse shading curtains, humidifiers, and ventilation windows, significantly improving crop yield and quality while reducing energy consumption.
Storage of medicines, rare artifacts, and premium tobacco has nearly stringent environmental requirements. The real-time monitoring and alarm functions of NiuBoL sensors effectively prevent massive property losses due to environmental out-of-control.
In electronic factories and laboratory constant temperature boxes, the NBL-W-LBTH serves as a core feedback element, controlling the operation of cooling, heating, and dehumidification systems to ensure processes remain in optimal condition.


To ensure long-term high-precision operation of the NBL-W-LBTH, the following recommendations are crucial:
Installation Location: The sensor should be installed in a representative area. For outdoor use, it is recommended to pair it with the NiuBoL dedicated lightweight louver box to avoid radiation errors from direct sunlight and direct rainwater flushing.
Height Selection: Meteorological monitoring typically recommends installation at 1.5–2 meters above ground level, the standard height with minimal ground thermal radiation interference that reflects human/crop activity environments.
Regular Calibration: Although NiuBoL sensors have extremely low drift characteristics, annual comparative calibration is still recommended, especially for the humidity unit, which may require surface cleaning in long-term high-pollution environments.

A: There is a clear physical function relationship between altitude and atmospheric pressure. Using the precise pressure value (hPa) measured by NiuBoL, combined with reference surface pressure, the system backend can easily convert to real-time altitude.
A: RS485 output not only supports the universal Modbus protocol for easy integration with various PLCs and data collectors but, more importantly, supports single-bus connection of multiple sensors, making it the best choice for building large-scale environmental monitoring networks.
A: No. The NBL-W-LBTH probe undergoes special waterproof treatment and can operate at 100% humidity. When environmental humidity decreases, the sensing element automatically restores normal measurement without manual intervention.
A: Yes. NiuBoL offers flexible customization services, providing shielded cables of different lengths based on your actual wiring scenarios to ensure optimal signal quality.

In this era of interconnected everything, environmental data is productivity. The NiuBoL NBL-W-LBTH air temperature, humidity, and pressure sensor, with its outstanding stability, three-in-one monitoring capability, and extremely high cost-performance, is becoming a trusted partner in the global environmental monitoring field.
Whether you are a meteorological researcher, smart farm owner, or industrial system integrator, NiuBoL can provide you with a precise, reliable, and easy-to-use perception foundation, helping your projects maintain an advantage in ever-changing environments.
Contact the NiuBoL technical team immediately for professional model selection solutions and the latest quotes tailored to your specific application scenarios.
NBL-W-LBTH-Atmosphere-temperature-humidity-and-pressure-sensor-instruction-manual-V4.0.pdf
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