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C1QX Wireless Air Quality Probe


C1QX is an indoor battery powered air quality measurement device, which uploads data to backend through various radio technologies such as NB-IoT or LoRaWAN.

Technical parameters

Device model name C1QX
Dimensions Weight: ~200 grams
Dimensions: 125 x 100 x 35 mm
Enclosure material: white ABS plastic
Power Integrated rechargeable battery (charger order code: C1QC-A0 for Li-Ion or C1QC-A1 for LiFePO4 version)
Wall adapter
Non-rechargeable battery, 1x C size 3.6V lithium battery
Recommended type: SAFT LS 26500 with 2x1 0,1” connector leads
Battery order code: ML-BATT-36-Mk1
Typical battery life at ~23°C Rechargeable battery (type: A0):
NB-IoT ~10.000 messages
Non-rechargeable battery:
~42.000 Sigfox messages
Wall adapter - no limit
Standard operation environment -10 to +50 °C of ambient temperature
max. 90% of non-condeing relative humidity
Wireless uplink options NBIoT
Sigfox,Fully certified by Sigfox as “Sigfox Ready” device
Class 0u - the highest TX signal propagation class
Max radio power output: 14dBm / 25mW
Transmit cycle power usage ~320uWh @25mW TX power for cycle duration 15 minutes
Antenna type NB-IoT: Integrated antenna
LORAWAN: Integrated antenna
Sigfox: Custom in-house designed ISM trace antenna tuned for Sigfox network
Sensor Factory calibrated.
Typical accuracy:
3%RH for humidity
0.3 °C for temperature
±30ppm for CO2
±0.1 °C


  • Sigfox packet format - see here.
  • NBIoT packet format - see here.

Label markings

Information included on the label:

  • Manufacturer
  • Device type
  • Full order code
  • Serial number
  • Uplink identificators

Sigfox version information on label:

  • Sigfox ID
  • Sigfox PAC

LoRaWAN version information on label:

  • DevEUI
  • AppEUI
  • AppKEY

How to order

Order shall contain the following information:

  • Date and internal number of the order
  • Name and address (including VAT number where appropriate)
  • Number of units and requested delivery date
  • Type of delivery

Order code table

Uplink radio type (R)
R0Sigfox RC1
R1LoRaWAN 1.0.2 - Class A - EU 868 MHz
R2LoRaWAN 1.0.2 - Class A - US 915 MHz
R3NB-IoT band 20
R4LoRaWAN 1.0.2 - Class A - AU 915 MHz
R5LoRa 868MHz
R6802.15.4 - 2.4GHz
R7Bluetooth LE (BLE) - 2.4GHz
RXspecial - on request
Measurement type (T)
T0Temperature, Humidity
T1Temperature, Humidity, CO2
T2Temperature, Humidity, Barometric pressure
T3Temperature, Humidity, CO2, Barometric pressure
T4Temperature, Humidity, CO2, VOC
T6Temperature and humidity on 2m long cable
TXspecial - on request
Power supply type (C)
C0Non-rechargeable LiSOCl2 3.6V battery 'C'
C1Rechargeable Li-Ion battery (internal)
C2Wall adapter (no battery)
C3Rechargeable LiFePO4 battery (internal)
CXspecial - on request
Order code example: C1QX-R3-T1-C0
Uplink radio type (R3): NBIoT - band 20
Type of measurement (T1): Temperature, Humidity, CO2
Power supply type (C0): Non-rechargeable LiSOCl2 3.6V battery "C"


Devices are packed individually into padded paper boxes.

The packaging includes all information required for proper use and servicing of the equipment.


The device must be installed on a vertical plane (wall) for optimal working conditions. Holes for intake of air pointing down and vent holes pointing up. The TOP of the device is either marked TOP or with an arrow pointing to the TOP of the device. TOP of the device should point upwards (towards ceiling).

For monitoring CO2 levels in classrooms or offices we recommend to install the sensor on the wall, minimum 1 meter distance from sitting person at the same hight as heads of people in the classroom or office.

Do not install facing direct sunlight.

Do not install into environments where relative air humidity stays above 80% RH for prolonged periods of time.

Device radio information is written on the packaging of the device. Serial ID is written on the device itself on the right edge of the device. Please use this serial number to communicate support requests with your supplier.

CO2 probe calibration

To adjust CO2 probe against reference CO2 reading please execute following steps:

  • Download "nRF Toolbox for Bluetooth LE" from Apple store or Google Play Store
  • Connect to the device according to the serial number written on the sensor enclosure
  • Tap "NUS/UART" and the console will launch
  • Execute the following command (without quotes):
  • "run frc 450" - where 450 is the reference value on the reference sensor
  • The calibration procedure will take up to 3 minutes. Logging information will be displayed in the console.
  • The sensor will reboot automatically after the calibration is finished.


Available on request on


For support please contact your distributor or manufacturer directly via