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Catalytic Combustible Gas Detector Module (BMCOM) BMA36M303

US$7.00
In stock
Quantity
15 pieces
Product ID
BMA36M303

The BMA36M303 is a catalytic combustible gas detector module composed of a breakout board and the gas detector sensor BM22S3031-1. The product reads the gas concentration and alarms via UART interface.

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DESCRIPTION

The BMA36M303 is mainly used to detect methane. When the gas concentration exceeds the default calibration concentration, the voltage output of the alarm pin STA (pin 1) changes from low level to high level (default).
It is easy to make a gas detector by supplying power to this sensor and monitoring the alarm output pin (STA).

BMA36M303 has been calibrated at the factory to maintain consistent characteristics. The calibrated alarm threshold is 9% LEL (Lower Explosion Limit), approximately equivalent to 4500ppm.

BMA36M303 has the same functions as the BM22S3031-1. The difference between them is that the BMA36M303 uses level shift circuit and a LDO IC HT7825 to break out the BM22S3031-1’s pins to match BMCOM connectors and can directly connect to BMduino development boards, such as BM53A367A.
You can use the product with other development boards, such as Arduino UNO, as well.

PRODUCT FEATURES
  1. Module type: catalytic combustible
  2. Input voltage: 3.0V~3.6V
  3. Operating current: 150mA @3.3V
  4. Gas concentration range: 500ppm~10000ppm
  5. Alarm threshold (factory calibration): 4500ppm (9%LEL) (configurable)
  6. Full range linear deviation: < 3% LEL
  7. Default preheat time: 180 seconds (configurable)
  8. Interface: UART (baud rate: 9600bps)
  9. Fault detection function
  10. When the gas concentration is detected to exceed the alarm threshold for five seconds, the sensor alarms (configurable)
  11. Factory calibrated
  12. Dimension: 53.83 x 33.88 x 21.1 mm
  13. Net weight: 11.5g
HARDWARE OVERVIEW
PIN DESCRIPTION
Pin Pin name Function
1 STA Alarm pin
Triggered: output high (default)
Non-triggered: output low
2 RX UART: RX
3 TX UART: TX
4 VDD Power supply: 3.0V~3.6V
5 GND Ground
PRODUCT SERIES COMPARING
BMA36M303 BMA36M302
Type Catalytic Combustible Semiconductor
Input voltage 3.0V~3.6V 4.9V~5.1V
Operating current 150mA @3.3V 160mA @5V
Interface UART UART
Gas concentration range 500ppm~10000ppm 300ppm~10000ppm
Alarm threshold 4500ppm (9%LEL) 4500ppm (9%LEL)
Full range linear deviation < 3% LEL -
Preheat time 180 seconds 180 seconds
Factory calibrated V V
Fault detection function V V
More Information
HS Code (reference) 8504.50.90.00-5
User's guide (919.40 kB)
Arduino library (791.94 kB)
Schematic (175.63 kB)
PCB layout (103.93 kB)
Youtube
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