Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Detected Gases	CO, NO2, H2, NH3, CH4
Operating Voltage	3.3V - 5.0V DC
Communication Interface	I2C / UART
Detection Range (CO)	0 - 1000 ppm
Detection Range (NO2)	0 - 10 ppm
Response Time	< 30 seconds
Operating Temperature	-20°C to +50°C
Dimensions	24mm x 20mm x 3.5mm
Warm-up Time	Approx. 3 minutes
Application Area	Industrial Safety, Air Quality Monitoring

6 reviews

Anonymous

Mar 29, 2026

Rating: 5/5

Compact and easy to interface

Love the small form factor. It fit perfectly into our custom enclosure. The UART interface made it very easy to connect to our ESP32 microcontroller. Response time is fast enough for real-time monitoring applications.

Anonymous

Mar 29, 2026

Rating: 5/5

Excellent sensitivity for industrial projects

Integrated this module into our warehouse safety prototype. The I2C communication is stable, and the readings for CO and NO2 are consistent when compared against our calibrated reference equipment. Highly recommended for engineering teams.

Anonymous

Mar 24, 2026

Rating: 3/5

Works but needs technical knowledge

The hardware is solid, but this is not a plug-and-play solution for beginners. You need to understand register maps and calibration algorithms to get accurate results. Great for professionals, steep learning curve for hobbyists.

Anonymous

Mar 22, 2026

Rating: 5/5

Perfect for university research

Used this for my final year project on urban air quality. The library examples provided helped me get started quickly. The sensor distinguishes well between background noise and actual gas presence.

Anonymous

Mar 16, 2026

Rating: 4/5

Good value, requires calibration

The sensor works well out of the box, but you definitely need to run a calibration routine in fresh air before deployment. Once calibrated, the data output for ammonia and methane is quite reliable. Documentation could be slightly more detailed.

Anonymous

Mar 12, 2026

Rating: 4/5

Reliable multi-gas detection

We are using these in several test chambers. The ability to detect five different gases with one module saves significant board space. The warm-up time is as specified, so plan your power management accordingly.

5 FAQ

Q: Is the output digital or analog?

A: The 4514 module provides a digital output via I2C or UART interfaces. It does not provide a raw analog voltage output proportional to gas concentration.

Q: How often does the sensor need to be calibrated?

A: We recommend performing a zero-point calibration in fresh air every 3 to 6 months depending on the exposure to target gases and environmental conditions to maintain high accuracy.

Q: Does this module come with a pre-installed library for Arduino?

A: Yes, we provide an open-source Arduino library on our GitHub repository that supports both I2C and UART communication modes for the 4514 module.

Q: Can this detect Carbon Dioxide (CO2) as well?

A: No, the 4514 module is specifically tuned for CO, NO2, H2, NH3, and CH4. It does not have selectivity for Carbon Dioxide (CO2). Please check our NDIR sensor series for CO2 detection.

Q: What is the expected lifespan of the sensor element?

A: Under normal operating conditions within the specified temperature and humidity ranges, the sensor element typically lasts between 2 to 3 years before recalibration or replacement is recommended.

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