AJ-981 Product Overview
AJ-981 uses a semiconductor gas-sensing element to monitor the surrounding air for combustible gas escaped from cookers,
boilers, heaters or LPG cylinders. When gas concentration reaches the preset alarm point, the unit activates a local acoustic
siren and status indicators; selected versions can also interconnect with other alarms or push alerts through a Wi-Fi app.
- Target gases: methane/natural gas and LPG (propane/butane mixture, model-dependent).
- Alarm principle: early leak warning at a preset percentage of Lower Explosive Limit (LEL).
- Typical trigger: audible alarm configured around
10% LEL; some AJ-981 variants are specified at8% LEL. Final setpoint depends on target market, gas type and certification version. [4,6](@ref) - Power options: AC mains adapter versions and wireless/Wi-Fi configurations for flexible deployment.
- Installation: plug-in or wall-mounting near gas-burning appliances; compact housing for kitchen use.
Methane and LPG Detection Performance
Residential gas alarms must respond early enough to give occupants time to ventilate, shut off the gas source and call for
service, while avoiding nuisance alarms from normal cooking vapours. The AJ-981 is tuned for residential combustible-gas
monitoring rather than industrial gas analysis.
| Parameter | Typical AJ-981 specification | Procurement note |
|---|---|---|
| Detection gas | Natural gas/methane or LPG, selected by model | Confirm single-gas vs dual-gas SKU for your market |
| Alarm threshold | Around 10% LEL in supplied brief; some listed variants 8% LEL, 0–20% LEL range | EN 50194 household alarms may be configured lower; verify certificate |
| Sensor type | Semiconductor gas sensor | Suitable for fixed residential leak warning; not a calibrated industrial analyzer |
| Audible output | Loud local siren; product listings cite 70–115 dB at 1 m depending on variant | Request exact dB and tone for landlord/retail specs |
| Status indication | LED indicators for normal, alarm and fault modes; self-test button on listed variants | Useful for inspection and end-user confidence |
EN 50194-1 covers electrical apparatus for detecting flammable gases in household premises, including natural gas, town gas and
LPG, with test and performance requirements for fixed continuous-operation alarms. [2,7](@ref) AJ-981 supply should be
ordered against the exact EN 50194-1 edition and alarm-type output required by the distributor country.
Standalone, Interconnected and Wi-Fi Models
| Configuration | Example/series | Best use case |
|---|---|---|
| Standalone | AJ-981 basic mains/plug-in | Single kitchen, rental unit, budget wholesale, replacement of old audible-only detectors |
| Interconnected | AJ-981 interlink version | Homes with multiple floors or separate utility/boiler room; one leak triggers whole-property warning |
| Wireless Wi-Fi / app | AJ-981W / AJ-981 Wi-Fi variants | Smart homes, landlords with remote portfolio monitoring, integrators bundling app alerts with other sensors |
Wi-Fi versions can send push notifications and event logs through a mobile app, while still keeping a local acoustic siren so the
alarm works during router or internet outages. For private-label smart-security bundles, AJ-981W can be paired with CO and smoke
lines under one app ecosystem.
EN 50194, CE, RoHS, FCC and Compliance
For UK/EU and export wholesale, AJ-981 can be supplied with documentation aligned to the following scope:
- EN 50194 / EN 50194-1:2019: European standard for household flammable-gas detection apparatus; confirm the exact edition and type (audible-only, audible plus output, etc.) on the issued certificate. [2,5](@ref)
- CE marking: for EU supply, relevant conformity areas typically include Low Voltage and EMC; Wi-Fi/radio versions additionally need radio compliance assessment. Confirm applicable directives and notified-body involvement per model.
- RoHS: material and BOM control for restricted hazardous substances in EEE; request RoHS declaration and test report for customs/retail audits. [14](@ref)
- FCC: applicable for US-bound wireless or digital models; request FCC Part 15 emissions/class information for the specific Wi-Fi SKU. [8](@ref)
- Regional performance certifications: additional marks can be discussed per destination; do not claim a specific national approval unless the shipped model holds that certificate.
Because EN 50194 covers household fixed installations and defines alarm/types for natural gas, LPG and related flammable gases,
distributors should match the supplied certificate edition, gas setpoint and installation manual to local expectations. [2,7](@ref)
OEM/ODM Custom Manufacturing
ANKA provides OEM and ODM services for gas-leak detectors aimed at distributors, security brands, electrical
wholesalers and smart-home resellers.
- Private labeling, model numbering and barcode/QR management
- Custom housing design, color, button layout and logo printing
- Standalone / interlinked / Wi-Fi variants with app connectivity
- Localized multi-language user manuals, warnings and packaging
- Gas-type configuration: methane-only, LPG-only or switchable per market
- Alarm setpoint, sound pressure, LED behavior and valve/output relay options by project
- Compliance file support: EN 50194, CE documentation, RoHS reports, FCC files for wireless SKUs
For new smart projects, wireless protocols such as Wi-Fi can be combined with local sirens and app dashboards; for conventional
trade stock, standalone AJ-981 remains the fastest MOQ-friendly entry product.
Installation and Placement Guide
- Install near gas-burning appliances such as cookers, boilers and water heaters, but follow the model manual for clearance from burners and ventilation.
- For natural gas/methane (lighter than air), place the detector high on the wall or near the ceiling according to the certified installation instructions; for LPG (heavier than air), follow LPG-specific height and proximity rules in the supplied manual.
- Avoid enclosed cabinets that block gas diffusion, and avoid locations with constant steam, heavy grease or forced-air drafts that may affect response.
- Test monthly using the self-test function where fitted; replace according to the sensor-life and end-of-life guidance on the certificate/manual.
Gas Detection Industry Reference
Buyers comparing residential and commercial/industrial options may also evaluate specialist manufacturers. These brands are
provided as industry context only and are not ANKA models:
- RKI Instruments – global designer/manufacturer of durable fixed and portable gas detection equipment.
- SENSIT Technologies – US-based producer of specialized gas-leak detectors and safety instruments since 1980.
- Macurco Gas Detection – developer of fixed and portable gas monitors for commercial and industrial safety applications.
AJ-981 is positioned for household/residential combustible-gas warning, whereas the above are often referenced for
industrial, commercial or portable professional detection. Choose according to site risk, certification and duty cycle.
