# Gas detector DAHUA HY-GA40A — Methane sensor, wall-mounted, DC powered, 86.6×86.6×29.2 mm

**URL:** https://aio.lv/en/product--dahua-hy-ga40a--7608951
**Data updated:** 2026-04-08 22:11 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** DAHUA
**Manufacturer code:** HY-GA40A
**EAN:** 6923172534842
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 34.99 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 28.92 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--dahua-hy-ga40a--7608951

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 20.07.2026 | free |
| Pickup points | 23.07.2026 | 1.89 EUR |
| Courier delivery to door | 23.07.2026 | 4.99 EUR |

## Summary description

DAHUA HY-GA40A is a wall-mounted methane gas detector for indoor use. It detects methane at up to ~1 m detection distance, is powered by DC with max consumption 0.8 W, and comes in a compact housing (86.6 × 86.6 × 29.2 mm). Designed for home safety and continuous leak monitoring, it provides early warning of methane presence.

## Long description

Dahua Technology HY-GA40A gas detector Methane is a wall-mounted detector designed for continuous monitoring of methane (CH4). It uses a catalytic-type gas sensor and an MCU-based control system to provide stable long-term detection. The device includes a built-in high-volume buzzer and relay output for linkage with exhausting fans or automatic valve shutoff. The alarm threshold is set at 10% LEL and the detector can also monitor ambient temperature.
Advantages
The HY-GA40A offers precise methane measurement through a catalytic sensor that provides stable performance and sensitivity with low false alarms. It features rapid audible and visual alerts when the gas concentration reaches the alarm threshold, and supports intelligent linkage to external devices such as exhaust fans or pipeline valves to help remove or isolate combustible gas sources. Compact wall-mounted design and low power consumption make it suitable for continuous operation in small spaces.
Suitable for
Residential kitchens and homes
Restaurants and hotel kitchens
Small commercial premises with natural gas or methane use
Boiler rooms and utility closets where methane leaks are possible
When it may not be suitable
This detector is specifically calibrated for methane using a catalytic sensor with an alarm threshold at 10% LEL. It is not intended for detection of gases other than methane unless explicitly supported by the manufacturer. Environments with explosive atmospheres requiring intrinsically safe certified equipment, or locations needing detection at parts-per-million sensitivity for toxic gases, may require specialized detectors.
Key specifications
Detected gas: Methane (CH4)
Sensor type: Catalytic-type gas sensor
Alarm threshold: 10% LEL
Power source: DC
Maximum power consumption: 0.8 W
Mounting: Wall
Detection distance (recommended): 1 m
Dimensions (W×H×D): 86.6 × 86.6 × 29.2 mm
Built-in alert: High-volume buzzer and visual indicator
Outputs: Relay output for linkage to exhaust fan or valve control
How to use
Install the detector on a wall approximately 1 meter from the potential leak source and at a height appropriate for methane accumulation (methane is lighter than air and tends to gather near ceilings). Connect the device to the DC power supply and to external equipment (exhaust fan or valve actuator) via the relay output if automatic linkage is required. After powering on, allow the sensor to stabilise according to the manufacturer’s warm-up recommendation before relying on alarm outputs. When the buzzer and visual indicator activate at or above the 10% LEL threshold, follow local safety procedures to ventilate, isolate the gas source and evacuate if necessary.
What to consider before purchase
Confirm methane is the target gas to detect; this detector is calibrated for CH4.
Check installation location and height for optimal methane detection (methane rises).
Verify power availability (DC) and compatibility with existing safety systems for relay linkage.
Consider environments that require intrinsic safety certification if used in hazardous/explosive zones.
Plan for periodic maintenance and sensor replacement intervals per manufacturer guidance.
Usage recommendations
Place the detector near probable leak points (gas appliances, pipeline connections) and test regularly. Keep the unit clean and free of obstructions, and ensure relay connections to fans or shut-off valves are tested during commissioning to confirm automatic response at the 10% LEL alarm point.

## Specifications

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 0 - 95 |
| Operating temperature (T-T) | -10 - 55 |
| Alarm decibels | 70 dB |
| Height | 86.6 mm |
| Width | 86.6 mm |
| Depth | 29.2 mm |
| Mounting type | Wall |
| Accuracy | 10 % |
| Power source type | DC |
| Interconnectable | Yes |
| Built-in display | No |
| Power consumption (max) | 0.8 W |
| Detection distance | 1 m |
| Quantity per pack | 1 pc(s) |
| Best uses | Home |
| Detected gas types | Methane |
| Sustainability compliance | Yes |
| Sustainability certificates | CE |

## FAQ

### How much does the DAHUA HY-GA40A gas detector (Methane) cost, and is it available for purchase?

The price is 34.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 32 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 20.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All DAHUA products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized DAHUA service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/7608951/54673667_large.webp