ODM Caravan CO2 Alarm Manufacturer & Suppliers

Residential alarms certified strictly under EN 50291-1 or standard domestic UL 2034 are evaluated in static room environments with stable temperatures (15°C to 25°C) and zero mechanical vibration. When installed in a towed caravan or motorhome, road vibration rapidly fatigues the lead pins of standard consumer electrochemical sensors, causing mechanical separation and open-circuit sensor failure.

Furthermore, standard residential alarms lack resistance to wide temperature swings (-20°C to +50°C), condensing moisture, and automotive 12V alternator load dumps. Caravans legally mandate certification under EN 50291-2 (Recreational Vehicles and Craft), which subjects the equipment to rigorous sinusoidal vibration, shock endurance, salt mist corrosion, and supply voltage fluctuations.

Carbon Monoxide (CO) is an odorless, colorless toxic gas produced by incomplete fuel combustion (faulty gas cookers, cracked water heater exhausts, diesel heaters). It binds to blood hemoglobin with 200 times greater affinity than oxygen, inducing carboxyhemoglobinemia and death at concentrations as low as a few hundred parts per million (ppm).

Carbon Dioxide (CO2) is a natural byproduct of human respiration and complete combustion. In an airtight, well-insulated caravan with windows closed, 2 to 4 adults can easily elevate CO2 levels from outdoor baselines (400–450 ppm) to over 3,000–5,000 ppm overnight. At these levels, occupants experience severe headaches, lethargy, cognitive impairment, and deep sleep stupor, preventing timely egress in emergencies. An NDIR CO2 alarm ensures healthy air exchange rates before hypercapnia occurs.

Cheap consumer CO2 sensors use Automatic Baseline Correction (ABC), which relies on an algorithm assuming that once every few days the room drops to clean outdoor air (400 ppm). In an off-grid caravan occupied continuously during rainy holidays, this assumption fails, causing severe false measurement calibrations.

Shield implements Dual-Wavelength Dual-Beam NDIR optics. One channel measures infrared absorption at 4.26 µm (CO2 absorption band), while the secondary reference channel measures at 3.91 µm (where no gas absorption occurs). Any optical path degradation caused by condensation, dust, aging infrared emitters, or chassis vibration affects both channels equally and is canceled out mathematically, guaranteeing rock-solid accuracy for up to 10 years without requiring routine outdoor air recalibration.

Yes. Shield's system architecture is designed from the PCB layer up for integrated active mitigation. Our detectors incorporate dry-contact SPDT relays and dedicated capacitive pulse-discharge outputs designed to trigger our JYFJS-011 Electromagnetic Gas Shut-Off Valve.

When LPG or combustible gas exceeds threshold limits (e.g., 10%–20% LEL), the alarm sends an instantaneous electrical pulse that releases the valve latch mechanism, closing the upstream LP line in less than 1 second. The valve requires manual reset by the user after inspecting and clearing the leak, guaranteeing that gas supply cannot re-energize automatically while occupants are asleep.

As a vertically integrated factory with 18+ years of dedicated gas safety R&D and over 80 production platforms, Shield accommodates both boutique caravan brands and multinational distributors:

• Tier 1 Customization (MOQ 500 pcs): Custom front-fascia silk-screening, bespoke retail packaging, customized alarm threshold parameters, and localized compliance labeling (CE, UKCA, FCC).
• Tier 2 Structural & Hardware ODM (MOQ 2,000 pcs): Custom low-profile injection-molded enclosures designed to match vehicle interior trim, surface or recessed flush-mount brackets, RV-C / CAN / LIN / Modbus communication interfaces, and multi-gas sensor module combinations (CO2 + CO + Combustible LPG).