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Elecbee CJMCU-4541 MiCS-4514 Dual-Channel Analog Gas Sensor Module, 5 V, CO and NO2 Air Quality Detection

SKU: EB0043831
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Key Features

DUAL-CHANNEL GAS SENSOR: The CJMCU-4541 breakout uses a MiCS-4514 MEMS metal-oxide sensor with two independent elements: a RED channel for reducing-gas response and an OX channel for oxidizing-gas response.

REGULATED 5 V OPERATION: Supply DC 4.9–5.1 V through VCC and GND. The MiCS-4514 operating range is -30 to 85°C and 5–95% RH; readings vary with temperature, humidity, airflow, warm-up and sensor condition.

ANALOG RED AND NOX OUTPUTS: RED and NOX provide resistance-derived analog signals for a host ADC or measurement circuit. PRE is the board's heater-control connection; verify the required drive sequence and logic before integration.

TYPICAL DETECTION RANGES: The two primary specified ranges are CO 1–1000 ppm and NO2 0.05–10 ppm. The sensing elements also respond to ethanol, hydrogen, ammonia and methane, but these gases are not measured on independent selective channels.

DEVELOPMENT USE: Designed for vehicle-exhaust and air-pollution sensing prototypes. Cross-sensitivity means calibration is required for concentration estimates. Package includes 1 sensor module; do not use it as a certified CO, combustible-gas, fire or life-safety alarm.

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Description

MiCS-4514 · DUAL ANALOG CHANNELS · 5 V

CO and NO2 Response for Air-Pollution Projects

The Elecbee CJMCU-4541 breakout integrates the MiCS-4514 dual-element MEMS gas sensor and exposes RED and NOX analog signals for vehicle-exhaust and air-quality development systems.

Upright view of the purple CJMCU-4541 board with shielded MiCS-4514 sensor

SENSING STRUCTURE

Two Independent Heated Sensing Elements

The MiCS-4514 contains two metal-oxide sensing elements with separate heaters and sensitive layers. The RED element responds primarily to reducing gases such as carbon monoxide, while the OX element responds primarily to oxidizing gases such as nitrogen dioxide.

RED ChannelReducing-gas response with a typical CO detection range of 1–1000 ppm.
OX / NOX ChannelOxidizing-gas response with a typical NO2 detection range of 0.05–10 ppm.
Front view showing VCC GND RED NOX and PRE labels on the CJMCU-4541 board

TECHNICAL DATA

Key Specifications

Listing Brand Elecbee
Module Model CJMCU-4541
Sensor MiCS-4514 dual-element MOS gas sensor
Supply Voltage DC 4.9–5.1 V
Primary Outputs RED and NOX analog resistance-derived signals
Board Connections VCC, GND, RED, NOX and PRE
PRE Connection Heater-control input; integration logic must be verified before use
Typical CO Range 1–1000 ppm
Typical NO2 Range 0.05–10 ppm
Other Responsive Gases Ethanol 10–500 ppm; hydrogen 1–1000 ppm; ammonia 1–500 ppm; methane above 1000 ppm
Operating Temperature -30 to 85°C
Operating Humidity 5–95% RH
Sensor Package 5 x 7 x 1.55 mm; sensor package only, not complete board dimensions
Mounting Two PCB mounting holes
Angled CJMCU-4541 gas sensor board shown beside a loose five-pin header

CONNECTION AND MEASUREMENT

Read Resistance-Derived Analog Signals

Connect regulated 5 V power to VCC and GND. RED and NOX are the measurement outputs for the reducing-gas and oxidizing-gas elements. PRE controls the heater circuit on this breakout; its required logic and timing must be confirmed for the intended controller before operation.

The analog outputs represent sensing-resistance changes, not ready-calculated ppm values. Concentration estimates require a suitable ADC or measurement circuit, warm-up, baseline characterization and calibration against known gas concentrations.

CJMCU-4541 board and loose header with VCC GND RED NOX and PRE connection labels

CROSS-SENSITIVITY

Multiple Gases, Two Non-Selective Channels

MiCS-4514 can respond to CO, NO2, ethanol, hydrogen, ammonia and methane, but the module does not provide an independent output for each gas. More than one gas can produce a similar response on the same sensing element, so gas identity and concentration cannot be determined from a single raw reading without application-specific calibration and supporting information.

MiCS-4514 detectable-gas ranges and RED OX response charts

APPLICATIONS

For Exhaust and Air-Pollution Prototypes

Use the CJMCU-4541 in development systems for vehicle-exhaust response, pollution trend logging and experimental air-quality monitoring. Readings depend on temperature, humidity, airflow, sensor history, warm-up and the mixture of gases present.

Rear PCB view showing the CJMCU-4541 model marking and signal traces
Important Measurement LimitationThe stated ppm values are typical detectable ranges, not guaranteed accuracy specifications. The two sensing elements are cross-sensitive and require correct heater control, warm-up, signal conditioning and calibration. Do not use this module as the sole basis for life-safety decisions or as a replacement for a certified CO, combustible-gas, fire or industrial safety alarm.
Package Contents1 x CJMCU-4541 MiCS-4514 gas sensor module
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WarrantyAll Elecbee purchases come with a 30-day money-back return policy, plus 1-year Elecbee warranty against any manufacturing defects.
This warranty shall not apply to any item where defects have been caused by improper customer assembly failure by customer to follow instructions, product modification, negligent or improper operation
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In-Stock
Qty.
1
Unit Price
$ 23.99
Ext. Price
$ 23.99
$ 23.99
Qty.
Unit Price
Ext. Price
10+
$23.27
$ 232.70
100+
$22.07
$ 2207.00
Inquiry for more quantity?