Portable concentration tester with sensitivity semiconductor oxide sensor for precise concentration analysis. Compact, easy to carry, and designed for clear, immediate feedback during spot checks and shared use. Key benefits sensitivity measurement: Advanced semiconductor oxide sensor detects small changes in concentration for reliable analysis. Compact and portable: Small volume and attached keychain make the tester easy to carry and deploy whenever needed. Clear, immediate feedback: Backlit LCD screen displays readings for easy viewing, and an audible alert notifies users instantly. Shareduse ready: Includes five replaceable nozzles to allow multiple users or multiple tests without swapping the same nozzle. Simple operation: Intuitive controls and fast readout reduce setup time and help streamline repeated measurements. What makes it stand out Sensor technology: Semiconductor oxide sensor designed specifically for concentration analysis, providing responsive performance. Designed for mobility: Lightweight form factor and keychain attachment enable onthego use and convenient storage. Versatile testing setup: Multiple nozzles provide flexibility for group settings or sequential testing without additional accessories. Practical applications Field spot checks: Quick, portable checks during inspections, maintenance rounds, or outdoor monitoring tasks. Onsite equipment monitoring: Fast concentration assessments during routine checks at worksites or production areas. Group or training sessions: Shared testing where individual nozzles allow several users to test in sequence while keeping tests separate. Specifications and usage notes Sensor type: Semiconductor oxide sensor for concentration analysis. Included accessories: Five replaceable nozzles and an attached keychain. Output and alerts: LCD display for numeric readout and audible alert for immediate notification. Size and portability: Small volume housing designed for pocket or keychain carry. This tester combines sensitive measurement, compact size, and straightforward operation for convenient, onthego concentration analysis across a range of field and onsite applications.