The HM-733NS Natural Gas Alarm is a UL1484 certified safety device designed for reliable gas leak detection in residential and light commercial environments. Equipped with a high-precision MEMS sensor, it provides stable and accurate detection with low power consumption.

The device features a 10-year sealed battery, ensuring long-term operation without replacement, reducing maintenance costs for large-scale deployments. It triggers an alarm at 10% LEL of natural gas, providing early warning before dangerous levels are reached.

With a loud ≥85dB alarm at 10 feet and clear LED indicators for status, alarm, and fault conditions, the HM-733NS ensures effective on-site alerts.

Manufactured under strict quality standards, it supports OEM/ODM customization, making it an ideal solution for distributors, contractors, and smart safety system integrators.

Sensor: MEMS

Operating Voltage: DC 3V

Battery Life: 10 Years

Warm-Up Time: About 3 Minutes

Alarm Concentration: 10%LEL(Natural Gas)

Sound Level: 85dB/10 ft

Normal indicator: Green Led On

Alarm indicator: Red Led Flash

Failure indicator: Yellow Led On

Operating Temperature: 0°C~+50°C

Operating Humidity: ≤95%Rh(No Condensation)

Dimensions: 104*73.5*38 mm

Certification: UL1484

Power Supply Mode: 10 Years Battery Built-In

Heiman is a professional manufacturer specializing in fire safety alarms and smart home sensors, with over 21 years of industry experience. Founded in Shenzhen, China, the company operates a dual manufacturing base in Shenzhen and Vietnam, with an annual production capacity of 15 million units. Heiman owns a CNAS ISO7025 accredited laboratory and an Intertek/ETL recognized satellite lab, ensuring strict quality testing and compliance. With over 1,000 patents and certifications, the company serves customers in more than 100 countries worldwide. Heiman provides one-stop OEM/ODM solutions, including industrial design, hardware and software development, cloud integration, and technical support, making it a reliable partner for global distributors and brands.