The device measures the temperature and humidity from an external probe on the cable - you can choose it from an optional accessory. In comparison with sensor W3811 the sensor W7811 is additionally equipped with an internal sensor of atmospheric pressure. The sensor is characterized by a simple and compact design with the possibility of installation directly into the measured space. Model with external cable probe is also suitable for measurements in areas where the risk of poor reception sigfox. The probe can be placed at the measurement point and the device itself where is able to reach a better signal. The probe length must not exceed 30 meters. The probe can be used with a suitable sensor cap even in more demanding conditions.
The measured values are sent in an adjustable time interval (10 min to 24 h) by radio transmission in the Sigfox network to the COMET Cloud, from which the user can view them using a personal computer or mobile device.
The instrument can monitor up to 2 alarm limits of the measured variable. Exceeding these limits is indicated by sending an emergency message. COMET Cloud transmits this alarm message via e-mail to the selected user. The device is suitable for applications that tolerate the delay of information delivered by Sigfox (max. 10 min).
Highlights:
- wireless transmission of measured values and alarm states
- battery power with low battery indication (battery life 4 months to 7 years)
- external power with optional accessories
- remote setting of the device from COMET Cloud (maximum once a day)
- IP65
- traceable calibration certificate in accordance with EN ISO / IEC 17025
The availability of Sigfox network in a particular location
Check your Sigfox network availability before you buy your device. COMET devices in the Sigfox network can be used anywhere in the RCZ1 zone. Learn more about Sigfox (RC) Radio Zones.
-
CodeW7811
-
Warranty3 years
TECHNICAL DATA
MEASURED VALUE
TemperatureRelative humidityCounted values (dew point…)Atmospheric pressureTEMPERATURE SENSOR
Measuring range according to the connected probe Digi/EAccuracy according to the connected probe Digi/EResolution 0.1 °CResponse time t90 of temperature measurement (temperature step 20°C, air flow approximately 1m/s) according to the connected probe Digi/EHUMIDITY SENSOR
Measuring range according to the connected probe Digi/EAccuracy according to the connected probe Digi/EResolution 0.1% RHDEW POINT
Measuring range according to the connected probe Digi/EAccuracy according to the connected probe Digi/EResolution according to the connected probe Digi/EATMOSPHERIC PRESSURE SENSOR SENSOR
Measuring range 600 to 1100 hPaAccuracy ±1.3 hPa at 23 °C from 800 to 1100 hPaResolution 0.1 hPaGENERAL TECHNICAL DATA
Operating temperature -30 to +60 °CChannels internal atmospheric pressure sensor, 1x connectable temperature+humidity probeMessage transmission interval adjustable 10 minutes, 20 minutes, 30 minutes,1 hour, 3 hours, 6 hours, 12 hours, 24 hoursAlarm message sending interval 10 minutesOperating frequency 868 MHzMaximum transmission power 25mWSigfox radiation class 0URadio configuration zone RCZ1 (operation is possible in Europe, Iran, Oman and South Africa)Typical range of transmitter 50 km in the field, 3 km in the cityPower Lithium battery 3.6 V, AA sizeProtection class IP54Dimensions 126 x 89 x 40mmWeight (including batteries) 150gWarranty 3 yearsBATTERY LIFETIME
Sending interval 10 minutes 20 minutes 30 minutes 1 hour 3 hours 6 hours 12 hours 24 hours lithium battery A4203 - 2200mAh 4 months 7 months 11 months 1,5 years 3,5 years 5 years 6 years 7 years battery holder (SP015) + 1x lithium battery A4206 - 8500mAh 1 year 2 years 3 years 5 years 10 years > 10 years > 10 years > 10 years battery holder (SP015) + 2x lithium battery A4206 - 8500mAh 2 years 4 years 6 years 10 years > 10 years > 10 years > 10 years > 10 years
US 7155 
BR 4304 
AU 1612 
CA 1600 
TH 1526 
JP 1468 
SG 1262 
VN 1108 
