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Description
xMQ-7 Gas Sensor Module
The MQ-7 gas sensor module is a device that can detect the presence of carbon monoxide (CO) gas in the air. It is commonly used in applications such as gas leak detectors, safety devices, and industrial control systems. The MQ-7 sensor operates by using a chemical reaction between the CO gas and a conductive metal oxide to produce a current. The magnitude of the current is proportional to the concentration of CO gas in the air. The gas sensor can be used to detect CO gas concentrations in the range of 20-2000 ppm. It is important to note that CO is a poisonous gas that can be dangerous at high concentrations. It is recommended to use the MQ-7 sensor with caution and to take appropriate safety measures when working with it.
This module provides both digital and analog outputs. The threshold level for digital output can be easily adjusted using the preset on the board. The MQ-7 sensor module can be easily interfaced with microcontrollers, Arduino and etc.
Read our blog MQ sensor where we explained what is a gas sensor, what is 1ppm equal to, MQ sensor list of different series and their features.
Applications:
- Domestic gas leakage detector
- Industrial CO detector
- Portable gas detector
Standard Test Conditions of MQ7 Gas Sensor
- Temperature: 20°C ± 2°C
- Humidity: 65% ± 5% RH
- Standard Test Circuit: Vc: 5.0V ± 0.1V; Vh(high):5.0V±0.1V
- Vh(low): 1.5V±0.1V
Specifications
| Model | MQ7 |
| Gas Sensibility | Carbon Monoxide |
| Operating voltage | 5V (DC) |
| Range | 10 ~ 1000 ppm |
| Return time | ? 30 sec |
| Heating resistance | ± 31 ? |
| Sensitivity | ? 3%. |
| Charachteristic Gas | 100 ppm CO |
| Dimension | 3.5 x 2 x 1.1cms |
| Weight | 5 grams |
Shipping & Return
xReturn Policy Overview
At ROBODIUM™, we want you to be completely satisfied with your purchase. You may return most items within 7 days of delivery for a full refund or exchange.
Return Window
- Standard Returns: 7 days from delivery date for any reason, including change of mind.
- Defective / Damaged Items: 7 days from delivery date.
- Manufacturing Defects (Warranty): 15 days from delivery, unless otherwise specified on the product page.
What Can Be Returned
Most items sold on ROBODIUM™ can be returned within the return window, including:
- Items you no longer need or changed your mind about
- Products received in damaged condition
- Items with manufacturing defects
- Wrong items received (item mismatch)
- Missing components inside the package
Return Conditions
To be eligible for a return, items must be:
- In their original, unused condition
- In the original packaging with all accessories, manuals, and free gifts (if any)
- Accompanied by proof of purchase
Note: Products damaged due to misuse, modification, static discharge, soldering, or improper handling may not be eligible for return.
How to Initiate a Return
- Contact us via email at support@robodium.com or call +91 8123109966
- Provide your order number and reason for return
- Submit photos/videos of the item (mandatory for damaged or defective products)
- Our team will review and approve your request within 1–2 business days
Return Pickup Process
We arrange the return pickup for you — hassle-free returns similar to major e-commerce platforms.
- Pickup is coordinated after return approval
- Pack the product securely in its original packaging
- Include a copy of the order confirmation or packing slip
- Our logistics partner will collect the package at the scheduled time
Return Shipping Costs
- Defective, damaged, or wrong items: ROBODIUM™ covers all return shipping costs.
- Change-of-mind returns: ₹100 return shipping fee will be deducted from the refund.
Refund Process
- Refund Method: Original payment method
- Processing Time: 5–7 business days after inspection
- Refund Amount: Full purchase price minus applicable return shipping fees
- Orders canceled before shipping receive a full refund (minus up to 5% payment gateway charges, if applicable)
Replacements
- Replacement is shipped after the returned item is inspected and approved
- Dispatched within 2 business days of receiving the return
- If replacement is unavailable, a full refund will be issued
Warranty Terms
All products include a minimum 15-day warranty against manufacturing defects, unless otherwise specified on the product page.
Warranty does not cover misuse, soldering damage, modifications, physical damage, or incorrect electrical connections.
Order Cancellations
- Orders in Pending or Payment Verification status can be canceled for a full refund
- Contact us immediately before shipping to cancel an order
- Once shipped, orders cannot be canceled but can be returned after delivery
Customer Service Commitment
- Email response within 24 hours on business days
- Phone support: Monday–Saturday, 10:00 AM – 6:00 PM IST
- Return request review: 1–2 business days
- Issue resolution within 48 hours of verification
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