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Did you know that Comet exists in a US version as well?

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manufacturer of measuring instruments
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Wireless thermometer, hygrometer, barometer for external probe, Sigfox IoT

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.

 

  • code
    W7811
  • Warranty
    3 years

Technical data

Measured value

Temperature
Relative humidity
Counted values (dew point…)
Atmospheric pressure

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

ATMOSPHERIC PRESSURE SENSOR SENSOR

Measuring range 600 to 1100 hPa
Accuracy ±1.3 hPa at 23 °C from 800 to 1100 hPa
Resolution 0.1 hPa

GENERAL TECHNICAL DATA

Operating temperature -30 to +60 °C
Channels internal atmospheric pressure sensor, 1x connectable temperature+humidity probe
Message transmission interval adjustable 10 minutes, 20 minutes, 30 minutes,1 hour, 3 hours, 6 hours, 12 hours, 24 hours
Alarm message sending interval 10 minutes
Operating frequency 868 MHz
Maximum transmission power 25mW
Sigfox radiation class 0U
Radio 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 city
Power Lithium battery 3.6 V, AA size
Protection class IP54
Dimensions 126 x 89 x 40mm
Weight (including batteries) 150g
Warranty 3 years

Optional accessories

Temperature+Relative Humidity

Digital temperature/humidity probe DIGIS/E-1, ELKA connector, cable 1 meter

Digital temperature/humidity probe DIGIS/E-1, ELKA connector, cable 1 meter

Temperature range: -10 to 60°C
code DIGIS/E-1
Digital temperature/humidity probe DIGIS/E-2, ELKA connector, cable 2 meters

Digital temperature/humidity probe DIGIS/E-2, ELKA connector, cable 2 meters

Temperature range: -10 to 60°C
code DIGIS/E-2
Digital temperature/humidity probe DIGIS/E-5, ELKA connector, cable 5 meters

Digital temperature/humidity probe DIGIS/E-5, ELKA connector, cable 5 meters

Temperature range: -10 to 60°C
code DIGIS/E-5
Digital temperature/humidity probe DIGIS/E-10, ELKA connector, cable 10 meters

Digital temperature/humidity probe DIGIS/E-10, ELKA connector, cable 10 meters

Temperature range: -10 to 60°C
code DIGIS/E-10
Digital temperature/humidity probe DIGIS/E-15, ELKA connector, cable 15 meters

Digital temperature/humidity probe DIGIS/E-15, ELKA connector, cable 15 meters

Temperature range: -10 to 60°C
code DIGIS/E-15
Digital temperature/humidity probe DIGIL/E-1, ELKA connector, cable 1 meter

Digital temperature/humidity probe DIGIL/E-1, ELKA connector, cable 1 meter

Temperature range: -30 to 105°C
code DIGIL/E-1
Digital temperature/humidity probe DIGIL/E-2, ELKA connector, cable 2 meters

Digital temperature/humidity probe DIGIL/E-2, ELKA connector, cable 2 meters

Temperature range: -30 to 105°C
code DIGIL/E-2
Digital temperature/humidity probe DIGIL/E-5, ELKA connector, cable 5 meters

Digital temperature/humidity probe DIGIL/E-5, ELKA connector, cable 5 meters

Temperature range: -30 to 105°C
code DIGIL/E-5
Digital temperature/humidity probe DIGIL/E-10, ELKA connector, cable 10 meters

Digital temperature/humidity probe DIGIL/E-10, ELKA connector, cable 10 meters

Temperature range: -30 to 105°C
code DIGIL/E-10
Digital temperature/humidity probe DIGIL/E-15, ELKA connector, cable 15 meters

Digital temperature/humidity probe DIGIL/E-15, ELKA connector, cable 15 meters

Temperature range: -30 to 105°C
code DIGIL/E-15
Ultra thin digital temperature/humidity probe

Ultra thin digital temperature/humidity probe

Temperature range: -10 to 60°C
code DIGIH/E-1
Ultra thin digital temperature/humidity probe, cable 2 m

Ultra thin digital temperature/humidity probe, cable 2 m

Temperature range: -10 to 60°C
code DIGIH/E-2
Ultra thin digital temperature/humidity probe, cable 5 m

Ultra thin digital temperature/humidity probe, cable 5 m

Temperature range: -10 to 60°C
code DIGIH/E-5

Other accessories

COMETEO Professional Multi-Plate Radiation Shield for Weather Sensors

COMETEO Professional Multi-Plate Radiation Shield for Weather Sensors

code F8100
COMETEO Professional Radiation Shield for Weather Sensors, actively ventilated with built-in fan

COMETEO Professional Radiation Shield for Weather Sensors, actively ventilated with built-in fan

code F8200
Holder for mounting the COMET Transmitter on magnetic surfaces

Holder for mounting the COMET Transmitter on magnetic surfaces

code SP102
Wall holder for external probes DIGIL

Wall holder for external probes DIGIL

code SP009
cable for transmitter adjustment via USB port

cable for transmitter adjustment via USB port

code SP003

Optional powering

Lithium battery 3,6V/AA

Lithium battery 3,6V/AA

code A4203
Adapter for external supply of IoT sensor with radio output to Sigfox network

Adapter for external supply of IoT sensor with radio output to Sigfox network

code SP014
Holder for 3.6 V lithium battery

Holder for 3.6 V lithium battery

code SP015
Lithium battery 3,6V/C

Lithium battery 3,6V/C

code A4206

Sensor covers

PTFE sensor protection, white

PTFE sensor protection, white

code F5300
sintered bronze sensor cover

sintered bronze sensor cover

code F0000
plastic sensor protection with stainless filter (gray)

plastic sensor protection with stainless filter (gray)

code F5200

Monitoring Software

COMET Cloud

COMET Cloud

code cloud

Monitorinig during transport - video