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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, Wireless M-Bus or LoRaWAN communication, as well as with or without display.  


Indoor sensor for temperature/humidity, LoRaWAN (End of life)

CMa11L is a temperature/humidity sensor for high-accuracy measuring in indoor environments. The sensor uses LoRaWAN, a low-power wide-area network (LPWAN) communication technique, to offer a combination of long range and extensive battery life - by using EcoMode, the sensor achieves a guaranteed battery life of at least 12 years. CMa11L support Elvaco One-Touch Commissioning (OTC) for secure and flexible deployment/configuration of your devices. Simply download the Elvaco OTC App to claim your sensor and all product-specific keys are automatically transferred to your account. Via OTC, configuration profiles are easily created and shared with other users to make the configuration of the sensors simple and flawless.


Casing material:
ABS UL94-V0, white
Protection class:
Dimensions (w x h x d):
80 x 80 x 25 mm
75 g

Electrical connections

Electrical characteristics

Environmental specifications

Operating temperature:
-20 °C to +55 °C
Operating humidity:
0 to 100 %
Operating altitude:
0-2000 m
Pollution degree:
Degree 2
Usage environment:
Storage temperature:
-40 °C to +85 °C
Measurement range, temperature sensor:
-20 °C to +60 °C
Measurement range, humidity sensor:
0 % RH to 100 % RH

Temperature sensor, margin of error

Temperature: 10 °C to 30 °C:
Temperature: 0 °C to 10 °C:
Temperature -10 °C to 0 °C:
Temperature: below -10 °C or above 30 °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

Green LED:
Red LED:
Super-cap indicator
Push button:
Start-up / reboot / switch off
NFC via Elvaco OTC app or downlink data


Wireless M-Bus

Integrated M-Bus Master

Wireless M-Bus Receiver

M-Bus slave interface


Data storage (examples)

Mobile Network

Fixed Network (Ethernet)



EN 61000-6-2, EN 61000-6-3

Connections and Interfaces


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

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