Air quality sensor Ajax 52273 White — indoor VOC and CO₂ monitoring sensor

Ajax 52273 White is an indoor air quality sensor that continuously monitors volatile organic compounds (VOC) and carbon dioxide (CO₂) levels. The compact, wall-mountable device provides real-time measurements to help maintain comfortable and safe indoor environments, support ventilation control and notify users when air quality deteriorates. The unit is powered by two CR123A batteries and is supplied with a SmartBracket mounting panel and installation kit.

Advantages

The Ajax 52273 offers continuous VOC and CO₂ monitoring in a compact white housing suitable for discreet indoor installation. Pre-installed batteries and included SmartBracket simplify setup. Its operating temperature range from 0°C to +50°C ensures reliable performance in typical residential and commercial indoor spaces. Wall-mount capability and a slim profile (77 × 77 × 34.5 mm) enable unobtrusive placement.

Suitable for

• Homes — monitoring indoor air quality in living rooms, bedrooms and kitchens
• Offices — tracking CO₂ and VOC levels in workspaces and meeting rooms
• Public spaces — use in reception areas, classrooms and small commercial premises

Key specifications

• Measured parameters: VOC and CO₂
• Power supply: 2 × CR123A batteries (pre-installed)
• Operating temperature range: 0°C to +50°C
• Colour: White
• Dimensions: 77 × 77 × 34.5 mm
• Included accessories: SmartBracket mounting panel, 2 × CR123A battery (pre-installed), installation kit, Quick Start Guide

How to use

Mount the sensor on a wall using the supplied SmartBracket and installation kit at a height and location representative of the room’s breathing zone, away from direct sources of heat, windows and vents. Ensure the pre-installed CR123A batteries are fitted and follow the Quick Start Guide to pair the device with the Ajax system or compatible monitoring platform. Allow the sensor to stabilise after installation before relying on initial readings.

Recommendations

Place the Ajax 52273 White in central locations of rooms where people spend extended periods. For accurate CO₂ and VOC readings, avoid installing the sensor directly above heat sources, near open windows, or immediately adjacent to ventilation outlets. Replace batteries according to device notifications and verify sensor placement if readings appear inconsistent.