W3911 IoT Wireless Thermometer, Hygrometer for External Probe, LoRaWAN Network

The W3911 sensor with LoRaWAN network output measures temperature and humidity using an external probe on the cable and can be installed directly in the measurement environment thanks to its IP65-rated housing. LoRa devices are powered by a replaceable battery with a lifespan of up to 10 years (3 years standard). External power is also available with optional accessories. The sensor can be used with a suitable cover even in the most demanding conditions.

Measured values ​​are transmitted wirelessly at adjustable intervals (from 5 minutes to 24 hours) to COMET's cloud storage, where users can access them via a computer or mobile device. The sensors are remotely configured from the COMET cloud and can monitor up to two alarm thresholds; any exceedance is notified by an alert sent to the user.

Key features

• Wireless transmission of measured values ​​and alarm states
• Battery powered with low battery indicator (battery life up to 10 years) and external power option
• Remote device configuration via COMET Cloud
• IP65 rated housing
• Calibration certificate with declared metrological traceability to standards according to CSN EN ISO/IEC 17025
• Pre-configured gateway available as an accessory at an additional cost. For ease of use, we offer the pre-configured SP041 LoRaWAN gateway, which is fully prepared to communicate with COMET Cloud and our sensors. This option simplifies the
• configuration process and saves users time

Technical data

• Measured value
• Temperature
• Relative humidity
• Counted values (dew point…)

TEMPERATURE SENSOR

• Measuring range according to the connected probe Digi/E
• Accuracy according to the connected probe Digi/E
• Resolution 0.1 °C
• Response time t90 of temperature measurement (temperature step 20°C, air flow approximately 1m/s) according to the connected probe Digi/E
  

HUMIDITY SENSOR

• Measuring range according to the connected probe Digi/E
• Accuracy according to the connected probe Digi/E
• Resolution 0.1% RH
  

DEW POINT

• Measuring range according to the connected probe Digi/E
• Accuracy according to the connected probe Digi/E
• Resolution according to the connected probe Digi/E

GENERAL TECHNICAL DATA

• Operating temperature -30 to +60 °C
• Channels 1x connectable temperature+humidity probe
• Message transmission interval adjustable 5-10-15-20-30 minutes, 1-2-3-4-6-8-12-24 hours
• Operating frequency Europe 863-870 MHz
• Maximum transmission power 25 mW (14 dBm)
• Typical range of transmitter 15 km in the field, 2 km in the city (sensor in building)
• Antenna internal, gain 2,15 dBi
• Maximum receiver sensitivity -136 dBm @BW=125 kHz, SF=12
• Power Lithium battery 3.6 V, AA size
• Protection class IP65
• Dimensions 126 x 89 x 40mm
• Weight (including batteries) 150g
• Warranty 3 years