Name: CO2 Sensor MH-Z19B with cable
Brand: OTRONIC
SKU: OT780
Price: 43.25 EUR
Availability: InStock

CO2 Sensor MH-Z19B with cable

Home Assistant

Sensor for measuring CO2 and air quality, suitable for Arduino, ESP8266, and ESP32 applications.

SKU: OT780 Article number: AB140 EAN: 8720618231932 Location: H09.07

€ 43,25 Incl. VAT (€ 35,74 Excl. VAT)

Expected in stock: 26/11/2026

30-day reflection period

1-year warranty

Ordered on weekdays before 2:00 PM, shipped today

Free returns

CO2 Sensor MH-Z19B with cable

The ideal sensor for measuring air quality (CO2 / nitrogen). To be used with an Arduino, ESP8266, or ESP32 in, for example, an air or ventilation system.

Power supply: 4.5 - 5.5V DC
Voltage (signal): 3.3V (5V compatible)
Current consumption: <20mA (average), 150mA (peak)
Measurement range: 0-2000ppm (standard), 0-5000ppm (adjustable)
Warm-up time: approx. 3min
Humidity operating range: 0~90% RH
Accuracy: ±50ppm+5% of measured value
Output signals: UART (3.3V TTL), PWM, DAC (0.4~2V)

Dimensions
Length: 3.9cm
Width: 2cm
Height: 0.9cm

Measure air quality
Adjustable range
UART PWM DAC
Compact size

Why choose this product?

Measures air quality – Measures CO2 and nitrogen in the air.
Suitable for Arduino – Usable with Arduino, ESP8266 or ESP32.
For ventilation systems – Suitable for air or ventilation systems.
Adjustable measurement range – Measures 0-2000 ppm by default, adjustable to 0-5000 ppm.
Fast warm-up time – Warm-up time of approx. 3 minutes.

Specifications

Power supply	4.5 - 5.5V DC
Dimensions	3.9 x 2 x 0.9 cm
Suitable for	Arduino, ESP8266, ESP32
Power consumption	<20mA (average), 150mA (peak)
Accuracy	±50ppm+5% of reading
Measurement range	0-2000ppm (standard), 0-5000ppm (adjustable)
Warm-up time	approx. 3 min
Operating humidity range	0~90% RH
Output signals	UART (3.3V TTL), PWM, DAC (0.4~2V)