---
product_id: 149404984
title: "MH-Z19 Infrared CO2 Sensor Module MH-Z19B Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B"
brand: "icquanzx"
price: "S$48"
currency: SGD
in_stock: false
reviews_count: 6
url: https://www.desertcart.sg/products/149404984-mh-z19-infrared-co2-sensor-module-mh-z19b-carbon-dioxide
store_origin: SG
region: Singapore
---

# Anti-water vapor interference Multi-output modes: UART, PWM, Analog Built-in temperature compensation MH-Z19 Infrared CO2 Sensor Module MH-Z19B Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B

**Brand:** icquanzx
**Price:** S$48
**Availability:** ❌ Out of Stock

## Summary

> 🌬️ Breathe smarter, monitor sharper — the future of air quality sensing is here!

## Quick Answers

- **What is this?** MH-Z19 Infrared CO2 Sensor Module MH-Z19B Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B by icquanzx
- **How much does it cost?** S$48 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/149404984-mh-z19-infrared-co2-sensor-module-mh-z19b-carbon-dioxide)

## Best For

- icquanzx enthusiasts

## Why This Product

- Trusted icquanzx brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Robust & Reliable:** Gold-plated gas chamber resists corrosion and water vapor for long-lasting performance.
- • **Energy Efficient Design:** Low power consumption (<20mA avg) keeps your projects sustainable and cost-effective.
- • **Plug & Play Integration:** Compact, 5V compatible module with quick 3-minute warm-up for rapid deployment.
- • **Precision CO2 Detection:** NDIR tech delivers accurate 400-5000ppm readings for smarter air quality insights.
- • **Versatile Signal Outputs:** Seamlessly integrates with UART, PWM, and analog interfaces for flexible system design.

## Overview

The MH-Z19B is a compact, high-sensitivity NDIR CO2 sensor module designed for precise air quality monitoring within 400-5000ppm range. Featuring built-in temperature compensation, multiple output modes (UART, PWM, analog), and a corrosion-resistant gold-plated gas chamber, it offers reliable, low-power operation ideal for HVAC, smart home, and environmental applications.

## Description

The MH-Z19B carbon dioxide gas sensor (hereinafter referred to as sensor) is an intelligent all-purpose small sensor that uses the NDIR (Non-Dispersive Infrared) principle to detect the presence of CO2 in the air with good selectivity and anaerobic properties, gas dependence, long life and other properties. Built-in temperature compensation. Simultaneously with serial output, analog output and PWM output, easy to use. The sensor is a high-performance sensor that combines sophisticated infrared absorption gas detection technology with precise beam path design and sophisticated circuit design. Parameters: Product Model Number:MH-Z19B Gas detection: carbon dioxide. Supply voltage: 4.5 ~ 5.5 V DC. Average current: <20 mA (at 5 V power supply). Peak current: 150 mA (at 5 V supply). Interface Level: 3.3V (5V Compatible) Measuring range: 400~5000ppm can be selected within the range Warm-up time: 3 minutes. Response time: T90 <120s. Operating temperature: 0 - 50 °C. Humidity: 0 to 95% RH (non-condensing). Features Gas chamber with gold plating, waterproof and corrosion resistant. High sensitivity, low power consumption. Excellent stability Temperature compensation, excellent linear output Provides serial (UART), analog (DAC) and PWM signal output methods Long-lasting. Water vapour interference, no poisoning. Applications: HVAC refrigeration technology Air Quality Monitoring Equipment Fresh air system. air purifying devices Smart Home SCHOOL Vin: Power Positive (Vin) GND: Negative Power Supply (GND) Vo: analogue output. PWM: PWM. HD: HD (zero for school, low for more than 7 seconds) Rx: TTL level data input for UART (RXD) Tx: TTL data output with UART (TXD) level. Pin 1: Analog Output Vo

Review: Seriously?? Poor reliability! - I ordered 4 of these sensors so far, from this very seller. Only 1/4 of them were working. The other 3 would alternate between returning null values or extremely low values like 30ppm, sometimes even negative values. Obviously my workshop does not have a negative value of co2 because that's impossible. Poor reliability and I suggest you go elsewhere.
Review: Hab's an einen esp32 angeschlossen. Mit Tasmota wurde es in den IObroker eingebunden. Jetzt steuere ich die Lüftungsanlage damit. Funktioniert wie gewünscht. Ist wohl auch relativ genau, habe zwei Stück, welche sehr nahe beieinander liegen. Hätte ich es von HMIP gekauft, hätte es 160€ pro Stück mehr gekostet.

## Features

- This gas sensor MH-Z19 C02 has a high sensitivity and resolution.
- Provide a variety of output modes for forms, e.g. UART and PWM Wave.
- Anti-water vapor interference, no poisoning.
- With temperature compensation, excellent linear output.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07VD15YRP |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 543,184 in DIY & Tools ( See Top 100 in DIY & Tools ) 152 in CO2 Detectors |
| Colour | Yellow |
| Customer Reviews | 3.7 3.7 out of 5 stars (89) |
| Date First Available | 20 July 2019 |
| Item Package Quantity | 1 |
| Item Weight | 20 g |
| Item model number | 00963 |
| Manufacturer | ICQUANZX |
| Package Dimensions | 12.1 x 7.8 x 1.1 cm; 20 g |
| Part Number | 00963 |
| Power Source | Corded Electric |
| Style | Compact |

## Product Details

- **Alarm:** Visual
- **Brand:** ICQUANZX
- **Colour:** Yellow
- **Item weight:** 0.02 Kilograms
- **Manufacturer:** ICQUANZX
- **Operating humidity:** 95 percent
- **Power source:** Corded Electric
- **Sensor type:** gas sensor
- **Style:** Compact
- **Upper temperature rating:** 50 Degrees Celsius

## Images

![MH-Z19 Infrared CO2 Sensor Module MH-Z19B Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B - Image 1](https://m.media-amazon.com/images/I/412+uFrCHuL.jpg)
![MH-Z19 Infrared CO2 Sensor Module MH-Z19B Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B - Image 2](https://m.media-amazon.com/images/I/4155oXwpWsL.jpg)
![MH-Z19 Infrared CO2 Sensor Module MH-Z19B Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B - Image 3](https://m.media-amazon.com/images/I/41R4HWnGg1L.jpg)
![MH-Z19 Infrared CO2 Sensor Module MH-Z19B Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B - Image 4](https://m.media-amazon.com/images/I/61GI3psGzsL.jpg)
![MH-Z19 Infrared CO2 Sensor Module MH-Z19B Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B - Image 5](https://m.media-amazon.com/images/I/61cdwpQ8SmL.jpg)

## Customer Reviews

### ⭐ Seriously?? Poor reliability!
*by N***A on 4 October 2022*

I ordered 4 of these sensors so far, from this very seller. Only 1/4 of them were working. The other 3 would alternate between returning null values or extremely low values like 30ppm, sometimes even negative values. Obviously my workshop does not have a negative value of co2 because that's impossible. Poor reliability and I suggest you go elsewhere.

### ⭐⭐⭐⭐⭐ Review
*by W***E on 28 December 2023*

Hab's an einen esp32 angeschlossen. Mit Tasmota wurde es in den IObroker eingebunden. Jetzt steuere ich die Lüftungsanlage damit. Funktioniert wie gewünscht. Ist wohl auch relativ genau, habe zwei Stück, welche sehr nahe beieinander liegen. Hätte ich es von HMIP gekauft, hätte es 160€ pro Stück mehr gekostet.

### ⭐⭐⭐⭐ Review
*by F***N on 12 October 2019*

Capteur peu cher et bien pratique pour mesurer grossièrement la qualité de l'air d'une pièce. Attention cependant, il faut impérativement désactiver la fonction d'auto calibration ("logic ABC" dans le datasheet du fabricant), sinon toutes les 24 heures le capteurs fera une calibration à 400PPM sans se poser de question. Il est préférable de faire une calibration manuellement plutôt que de laisser le capteur dériver au grès du vent (littéralement). (400 PPM ~= air extérieur, hors agglomération) Connecteur : Fil noir : masse, Fil rouge : +5volts, Fil bleu : Rx, Fil vert : Tx.

## Frequently Bought Together

- ICQUANZX MH-Z19 Infrared CO2 Sensor Module MH-Z19B Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B
- Elegoo 120pcs Multicolored Dupont Wire 40pin Male to Female, 40pin Male to Male, 40pin Female to Female Breadboard Jumper Wires Ribbon Cables Kit for arduino

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-18*