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Sensors

Elvaco offers temperature and humidity sensors, both for indoor and outdoor environments. The product line enables simple and cost-effective metering, which enables a more effective use of energy and a better real-estate climate. Sensors are available with M-Bus or Wireless M-Bus communication, as well as with or without display.  

 

CMa20w - Outdoor temperature/humidity sensor Trådlös M-Bus

CMa20w is a Wireless M-Bus temperature and humidity sensor for outdoor use. It has a high accuracy and provides information about momentaneous meter values as well as average meter values for the last hour and day. The sensor is a perfect option for outdoor climate logging when wiring is not an option.

Mechanics

Casing material:
Polystyrol
Protection class:
IP65
Dimensions (w x h x d):
110 x 100 x 52 mm
Mounting:
Wall-mount
Weight:
140 g

Electrical connections

Supply voltage:
Battery, life span 12 years

Electrical characteristics

Environmental specifications

Operating temperature:
-20 °C to +45 °C
Operating humidity:
0 to 95 %, no condensation
Operating altitude:
0-2000 m
Pollution degree:
Degree 2
Usage environment:
Outdoors
Measurement range, temperature sensor:
-20 °C to +45 °C
Measurement range, humidity sensor:
0 % RH to 100 % RH

Temperature sensor, margin of error

Temperature: 10 °C to 30 °C:
±0.2°C
Temperature: 0 °C to 10 °C:
±0.4°C
Temperature -10 °C to 0 °C:
±0.5°C
Temperature: below -10 °C or above 30 °C:
±1.5°C

Humidity sensor, margin of error

Humidity: 10 % RH to 90 % RH:
±2% RH
Humidity: below 10 % RH or above 90 % RH:
±4% RH

User interface

Push button:
Configuration/activation
LCD diplay:
No
Momentary values:
Temperature, humidity, status
Historic values:
Min, max and average values

M-Bus

Interfaces:
M-Bus slave
M-Bus standard:
EN 13757-4. Communication by C1-b

Wireless M-Bus

Integrated M-Bus Master

Wireless M-Bus Receiver

M-Bus slave interface

Frequency, Wireless M-Bus:
868.95 MHz
Transmit power:
25 mW
Transmit interval:
3 minutes
Encryption:
Yes
Wireless M-Bus modes:
C1-b

General

Data storage (examples)

Mobile Network

Fixed Network (Ethernet)

Integration

Compatibility:
Devices using the Wireless M-Bus protocol

Approvals

EMC:
EN 61000-6-2, EN 61000-6-3

Connections and Interfaces

Transmissions

For downloads, please visit our support site at: https://support.elvaco.com

Our website has gathered all resources you need to update, tune and troubleshoot your installations, such as:

  • Latest software versions
  • FAQs
  • Guides
  • In-depth technical information
  • Support forum

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