Analox Sub Aspida Portable Pressure-Compensated O2 & CO2 Gas Monitor
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Analox Sub Aspida - Portable Pressure-Compensated O₂ & CO₂ Gas Monitor
The Analox Sub Aspida is a compact, portable dual-gas monitor designed to measure both oxygen (O₂) and carbon dioxide (CO₂) in environments where atmospheric pressure can affect conventional gas-sensor accuracy.
Unlike standard ambient gas monitors, the Sub Aspida incorporates pressure-compensated O₂ and CO₂ sensing. This allows the instrument to account for changes in atmospheric pressure within its rated operating range, helping provide more reliable gas measurements in specialized pressurized and reduced-pressure environments.
The portable platform combines simultaneous O₂ and CO₂ monitoring with datalogging, configurable alarms, a high-visibility OLED display, rechargeable or replaceable AA battery operation, and a rugged IP65-rated enclosure.
Key Features
Dual O₂ + CO₂ Monitoring
DUAL GASSimultaneously monitors oxygen and carbon dioxide from one compact portable instrument.
- Electrochemical oxygen sensor
- Analox infrared MIR carbon dioxide sensor
- Continuous monitoring or spot-check capability
- Designed for atmospheric safety monitoring applications
Pressure-Compensated Sensors
COREDesigned specifically for environments where changes in atmospheric pressure can influence conventional gas readings.
- Pressure-compensated O₂ sensing
- Pressure-compensated CO₂ sensing
- Rated operating pressure of 700 to 1200 mbara
- Useful for specialized pressure-variable environments
High-Visibility OLED Display
Clear digital display provides immediate access to atmospheric gas readings and instrument status.
- Organic Light Emitting Diode display
- High-visibility readout
- Displays monitored gas information simultaneously
- Designed for rapid interpretation in operational environments
Multiple Alarm Systems
Multiple alert methods help make abnormal atmospheric conditions difficult to overlook.
- 95 dB audible alarm at 30 cm
- Visual LED alarm indicators
- Vibration alarm
- Time Weighted Average alarm
- Man-down alarm functionality
Integrated Datalogging
Automatically records measurements for later review and documentation.
- One data log approximately every 30 seconds
- At least 7 days of continuous-use logging capacity
- Supports monitoring history and operational review
- PC configuration software support available from Analox
Portable Battery Operation
Designed to remain useful even where fixed electrical power is unavailable.
- 2 × NiMH 2100 mAh AA rechargeable batteries
- Suitable AA-type batteries may also be used
- Approximately 12-hour nominal operating time
- Approximately 4.5-hour charge time from flat
Compact & Wearable
Small enough for personal monitoring while remaining capable of fixed-position use.
- Approximately 5 × 1.7 × 3.5 inches
- Approximately 11.8 to 12.3 oz depending on configuration
- Belt-clip configurations available
- Wall or panel mounting configurations available
User-Maintainable Platform
Designed to simplify routine maintenance and sensor management.
- O₂ sensor can be calibrated in fresh air
- CO₂ sensor typically requires calibration every 12 months
- Maintenance reminders built into the system
- Replaceable sensor architecture
Why Pressure Compensation Matters
Gas sensors calibrated at normal atmospheric pressure may behave differently when ambient pressure changes. In pressure-variable environments, the relationship between gas concentration, partial pressure, and the sensor response becomes especially important.
The Sub Aspida was developed specifically for these applications. Its pressure-compensated sensing architecture helps account for changes in surrounding atmospheric pressure so that O₂ and CO₂ measurements remain meaningful throughout the unit's specified operating range.
Oxygen Monitoring
Oxygen concentration can become critical in both oxygen-enriched and oxygen-deficient environments.
- Monitors oxygen using an electrochemical sensor
- Supports oxygen-enrichment monitoring
- Supports oxygen-deficiency monitoring
- Pressure compensation helps account for changing conditions
Carbon Dioxide Monitoring
CO₂ accumulation can occur in enclosed or poorly ventilated environments and may not be apparent without instrumentation.
- Analox infrared MIR sensing technology
- Measures CO₂ partial pressure
- Continuous atmospheric monitoring capability
- Multiple alarm modes available
Applications & Use Cases
System Specifications
Amber: Fault
Red: Alarm
Approx. 5 × 1.7 × 3.5 in.
CO₂ Sensor Specifications
O₂ Sensor Specifications
Alarm & Safety Functions
Datalogging & Monitoring
Battery & Power
Calibration & Maintenance
Warranty
Ordering & Configuration
The Sub Aspida has been produced in several sensor-range and mounting configurations. Final configuration should be selected according to the intended monitoring environment and required measurement range.
Need help selecting the correct configuration? Contact MedEq Fitness before ordering and we can help match the sensor range and mounting configuration to the intended application.
Important Use & Pressure Information
The Sub Aspida is a pressure-compensated gas monitor, but pressure compensation should not be confused with unlimited pressure compatibility. The instrument should only be operated within the pressure, temperature, humidity, gas-range, and environmental limits specified by the manufacturer.
In particular, the published 1200 mbara upper operating limit is below the absolute pressure found inside typical 1.3 ATA, 1.5 ATA, and 2.0 ATA hyperbaric chambers. Do not use this model above its published operating-pressure specification.
Users are responsible for determining whether the instrument, sensor configuration, alarm settings, and environmental ratings are appropriate for their specific application. Follow all Analox operating, calibration, maintenance, and safety instructions.
Why Buy Through MedEq Fitness?
Application-Focused Selection
We help evaluate the monitor against the environment in which you plan to use it.
- Pressure-range review
- Sensor-range selection
- O₂ and CO₂ monitoring considerations
- Mounting and operational requirements
Hyperbaric Equipment Expertise
MedEq understands that atmospheric monitoring requirements change substantially when pressure changes.
- Experience with hyperbaric equipment environments
- Attention to absolute-pressure ratings
- Gas-monitoring equipment selection guidance
- Support for professional and wellness facilities
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