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Wireless sensor

Wireless environment CO2 sensor

  Wems-co2 wireless environmental CO2 sensor is a high-precision environmental CO2 concentration acquisition equipment. It is equipped with low-power and high-performance RF front-end, which is widely used in various indoor environmental measurement, agricultural greenhouse intelligent management and environmental CO2 concentration measurement and recording. It has the characteristics of low power consumption, long transmission distance and rich peripheral interfaces. The networking mode is flexible, supporting point-to-point, star network and tree network topology; the device supports low power consumption mode, and the minimum sleep current of the device can reach 15mA (depending on the peripheral expansion equipment).

产品详情

Product characteristics

it has its own RTC, which supports low power consumption of all nodes in the whole network;

independent LED indication;

The accuracy of CO2 is ± 3%, and the measurement range is 0-5000 ppm;

integrated data storage, supporting automatic data collection and storage after network connection, with a maximum of 20000 records;

power supply mode is external power supply and battery power supply, external power supply voltage is 6V ~ 12V, battery power supply voltage is 3V;

optional 2.4GHz or 780mhz wireless working frequency band;

RF transmission power can be selected: - 11dbm ~ +10dBm@780MHz -17dBm ~ +3dBm@2.4GHz ;

Multi parameter configurable;

The data acquisition period is adjustable between 1s and 18h;

the enclosure meets IP53 protection level;

working temperature: - 40 ~ 85 ℃;

dimension (mm): 38 (diameter) x 150 (length)


Description and schematic diagram of network topology

Wems-co2 equipment supports point-to-point, star network and tree network architecture

1) It supports all nodes in the whole network to sleep in low-power mode;

2) Support timing data acquisition and control;

3) The timing time can be adjusted at any time, supporting 1 second to 18 hours;

4) The network supports multi-level routing, and any node can be used as a routing node;

5) The network supports link self-healing and automatically repairs the transmission link;


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Detailed specifications

1、Technical index of 2.4GHz frequency band

Test conditions: VCC = 3.0V, working frequency: 2.45GHz, test temperature: 25 ℃

project

Parameter value

project

Parameter value

CPU + RF power supply voltage (VCC)

1.8~3.6V

Maximum transmitting power

+3dBm

Working current: RX mode

19mA

Minimum transmit power

-17dBm

Working current: TX mode

20mA

Receiving sensitivity

-101dBm

Working current: sleep mode

15uA

Wireless rate

250~2000kbps

RF operating frequency

2.4~2.48GHz

TX/RX RF interface impedance

50 Ohms

Number of available frequency bands

16

Open communication distance

750m

Frequency interval

5MHz

Timing acquisition interval

1秒~18小时

Enclosure protection class

IP53

Operating temperature range

-40~85℃

Boundary dimension (mm)

Diameter (43mm) × height (139mm)

Operating humidity range

0-95% non condensing

 2、Technical index of 780mhz frequency band

Test conditions: VCC = 3.0V, working frequency: 782mhz, test temperature: 25 ℃

project

Parameter value

project

Parameter value

CPU + RF power supply voltage (VCC)

1.8~3.6V

Maximum transmitting power

+10dBm

Working current: RX mode

15mA

Minimum transmit power

-11dBm

Working current: TX mode

29mA

Receiving sensitivity

-110dBm

Working current: sleep mode

15uA

Wireless rate

20~1000kbps

RF working frequency (China)

779~787MHz

TX/RX RF interface impedance

50 Ohms

Number of available RF bands

4

Frequency interval

5MHz

The communication distance is the longest in open land

2000m

Timing acquisition interval

1 second to 18 hours

Enclosure protection class

IP53

Operating temperature range

-40~85℃

Boundary dimension (mm)

Diameter (43mm) × height (139mm)

Operating humidity range

0-95% non condensing


ordering information


Product model

Working power supply

Wireless rate

Transmitting power

Radio frequency band

Range and accuracy

Enclosure protection

WEMS-CO2/2400

Battery2.5~3.6V

250Kbps

3dBm

2.4GHz

0~5Kppm,±3%

IP53

WEMS-CO2/780

Battery2.5~3.6V

250Kbps

5dBm

780MHz

0~5Kppm,±3%

IP53