Un robust wireless temperature and humidity sensor is a specialized device, designed to collect climatic data in difficult, industrial or outdoor conditions, where standard smart home equipment would not withstand. These sensors prioritize durability și reliability data transmission over long distances.
Key Product Information
Specifications vary by manufacturer and application, but general features include:
Physical and Environmental
- Degree of Protection (IP): Rugged devices usually have a rating of IP65, IP66 or IP67. An IP65 rating, for example, ensures protection against dust and water jets.
- Case Material: Usually made of durable ABS or polycarbonate plastic, or even stainless steel for probes.
- Operating Range: They are designed to operate in extreme temperatures, frequently between -40°C și +75°C or even more with an external probe.
Performance
- Temperature Accuracy: High precision models offer a small margin of error, around ±0.2°C to ±0.5°C.
- Accuracy Humidity: Typical accuracy is between ±2% și ±5% RH (Relative Humidity).
- Measurement Range: It typically covers the entire humidity range (0-100% RH) and a wide temperature spectrum (-40°C to +125°C for probes).
Connectivity and Power
- Wireless Technology:
- LoRaWAN®: A popular option for industrial applications due to its long range (up to 2 km in cities, 15 km in open field) and low power consumption.
- NB-IoT (Narrowband-IoT): Uses cellular networks for extended coverage, similar to a cell phone.
- Bluetooth® Low Energy (BLE): Used for local monitoring, often via a separate gateway.
- Wi-Fi / Zigbee: Common technologies, but often require a hub (gateway) and are more common in smart home applications.
- Battery life: [#$$#] A major advantage of industrial sensors is the extended battery life, which can be of 2 to 10-15 years, depending on the reporting frequency.
Typical Applications
- Monitoring conditions in cold storages and cold chains.
- Climate control in greenhouses and agricultural farms.
- Environmental monitoring in ventilation ducts (HVAC) or technical rooms.
- Smart City applications and external monitoring.
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