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CMa20

Elvaco - CMa20 - Outdoor temperature/humidity sensor
  • CMa20 is an outdoor temperature and humidity sensor which uses standard M-Bus communication.
  • It has a high accuracy and provides information about momentaneous meter values as well as average meter values for the last hour and day.
  • CMa20 is the ideal product for temperature and humidity report of outdoor climate.
  • The high accuracy sensor and user friendly handling makes the CMa20 the perfect choice for outdoor climate logging.
TEMPERATURE AND HUMIDITY
  • The CMa20 has a high accuracy temperature and humidity sensor, which will provide precise and fast readings. The precision meets the standards for measuring outdoor climate.
M-BUS READOUT
  • The M-Bus readout consists of momentary values and the average values for the last hour and day. The power used by CMa20 is only 1 T (1.5 mA) and both primary and secondary addressing mode can be used.
Mechanics
Casing material Polystyrol
Protection class IP65
Dimensions  110 x 100 x 52 mm
Weight  140 g
Connection M-Bus Screw terminal <1.5 mm²
Mounting  Wall mounted
Electrical
Power supply  21-42 VDC through M-Bus connection, independent of the wiring polarity
Power consumption  1.5 mA M-Bus 1T
Environmental
Operating temperature range -40 °C to +55 °C
Storage temperature range -40 °C to +85 °C
Operating humidity 0 to 100 % RH no condensation
Temperature sensor
Temperature range  -40 °C to +55 °C
Temperature 10 to +30 °C  +/- 0.2 °C
Temperature 0 to +10 °C  +/- 0.4 °C
Temperature -10 to +0 °C  +/- 0.5 °C
Temperature -40 to +55 °C  +/- 1.5 °C
Humidity sensor
Range  0 – 100 % RH
Repeatability RH  +/- 0.1 % RH
Humidity 10 to 90 % RH  +/- 2 %
Humidity 0 to 100 % RH  +/- 4 %
Manuals

Elvaco – CMa20 – Outdoor temperature/humidity sensor

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