The Siemens Servo Ventilator 900C is a classic mechanical ventilator introduced by Siemens-Elema in 1981 and recognized for its versatile approach to respiratory support. This refurbished Siemens Servo Ventilator 900C is designed for ventilation across infant, pediatric, and adult patient populations, with applications in intensive care, anesthesia, and transport settings.
The system combines a pneumatic gas-delivery unit with an electronic servo-control unit. The pneumatic section manages gas delivery, mixing and routing, while the electronic section regulates gas flow and pressure through servo-controlled feedback loops according to user-defined settings.
✅ Key Features
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Infant to adult application: Adaptable for neonate, pediatric and adult ventilation.
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Classic servo-controlled design: Uses electronic servo regulation to control gas flow and pressure.
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Integrated pneumatic system: Internal bellows, valves and filters manage gas delivery and routing.
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Multiple ventilation modes: Supports volume control, pressure control, pressure support, SIMV and CPAP.
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Volume control with sigh: Provides an optional sigh function during volume-controlled ventilation.
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SIMV with pressure support: Combines synchronized mandatory ventilation with pressure support.
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Manual ventilation: Includes a manual ventilation function.
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Low-volume capability: Designed for precise ventilation across a broad patient range.
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High-frequency capability: Supports high-frequency ventilation applications according to configuration.
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Broad respiratory-rate range: Adjustable from 5 to 120 breaths/minute.
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Adjustable inspiratory time: 20%–80% of the respiratory cycle.
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Adjustable pause time: 0%–30% of the respiratory cycle.
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High working pressure: Working pressure up to 120 cmH₂O.
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Efficient power consumption: Approximately 40 W.
Ventilation Modes
| Mode |
Function |
| Volume Control |
Delivers volume-controlled ventilation, with optional sigh |
| Pressure Control |
Provides pressure-controlled mechanical ventilation |
| Pressure Support |
Supports spontaneous patient breathing |
| SIMV |
Synchronized intermittent mandatory ventilation |
| SIMV + Pressure Support |
Combines mandatory breaths with pressure support |
| CPAP |
Continuous positive airway pressure for spontaneous breathing |
| Manual Ventilation |
Allows manual ventilation operation |
System Structure
Pneumatic Unit
The pneumatic section is responsible for the physical management of respiratory gases. It incorporates components such as:
- Gas-delivery pathways
- Gas mixing components
- Internal bellows
- Valves
- Filters
- Gas-routing components
Electronic Unit
The electronic section provides servo-controlled regulation loops that monitor and adjust gas flow and pressure in relation to the selected ventilation settings.
This combination of pneumatic gas delivery and electronic servo regulation forms the core operating architecture of the Servo Ventilator 900C.
Technical Specifications
| Specification |
Details |
| Manufacturer |
Siemens-Elema |
| Model |
Servo Ventilator 900C |
| Equipment Type |
Mechanical ventilator |
| Condition |
Refurbished |
| Patient Range |
Infant, pediatric & adult |
| Applications |
ICU, anesthesia & transport |
| Volume Control |
Yes, with/without sigh |
| Pressure Control |
Yes |
| Pressure Support |
Yes |
| SIMV |
Yes |
| SIMV + Pressure Support |
Yes |
| CPAP |
Yes |
| Manual Ventilation |
Yes |
| Respiratory Rate |
5–120 breaths/min |
| Inspiratory Time |
20%–80% of respiratory cycle |
| Pause Time |
0%–30% of respiratory cycle |
| Working Pressure |
Up to 120 cmH₂O |
| Power Consumption |
Approx. 40 W |
| Low-Volume Ventilation |
Supported |
| High-Frequency Capability |
Supported according to configuration |
Product Disclaimer
Specifications and included accessories may vary by production batch, market, or manufacturer revision. Please verify the exact configuration with the seller before purchase. This product information is intended for general product guidance and does not replace professional medical advice, diagnosis, or treatment.
