I. INTRODUCTION
ETCO2 Module, or end-tidal CO2, or End tidal Carbon Dioxide Module, ETCO2 Module is an OEM module used in Patient Monitors, Ventilators or Anesthesia Machine to monitor the breath status (ETCO2, CO2 waveform, Real-time CO2, Inspired CO2, Respiratory Rate) by measuring exhalant gas from people. It is useful in the ICU, surgery, anesthesia ward, emergency clinic, etc.
The OEM ETCO2 module (C200) is a complete data collection and analysis system for monitoring respiratory carbon dioxide concentration. The C200 module includes a miniature CO2 sensor, barometric pressure transducer, sampling flow control and a miniature low-power vacuum pump. A microprocessor collects the sensor data and calculates various real-time parameters: instantaneous CO2 concentration, respiration rate, end-tidal CO2, inspired CO2, inspiration and expiration times.
The ETCO2 module (C200) is the best cost effective product in the worldwide market which helps the patient monitor manufactures to cut the cost to quite a large extend while achieving the same or better performance and functions as the other ETCO2 modules.
The module is highly configurable to meet most OEM implementation requirements. System specifications such as sampling flow rate and floating point data format can be changed by customer.
The host sends commands and receives waveform, breath parameters and command responses on two +5.0V asynchronous serial data lines (TTL or RS232).
II. HIGH LIGHTS
● Best performance price ratio in the world. The price is clearly lower than other similar module and the performance is better than them.
● Better stability. Better design can wipe off the excursion from temperature, pressure and inconsistent component.
● Better self-protected ability. It allows wrong power supply, humidity in the pipeline.
● Better communication interface. TTL or RS232 can be choice by customer.
● Better policy of after service. Manufacturer promises that the module can be replaced by a new one if it is not damaged by man-made in one year.
● Longer life. Using long-life IR source (100 thousand hours life).
III. SPECIFICATIONS
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Specification
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Mode of Sampling:
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Sidestream
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Standards:
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ISO 21647
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Principle of Operation:
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Infrared Absorption
Non-dispersive Infrared (NDIR) single beam optics, dual wavelength, no moving parts.
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Initialization Time:
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Capnogram displayed in less than 4 s, at an ambient temperature 25℃,full specifications within 2 minutes.
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CO2 Measurement Range:
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0～152 mmHg (0～20.0 %, 0～20 kPa)
(Barometric Pressure supplied by module and mmHg reading is auto-calculated )
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CO2 Calculation Method:
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BTPS (Body Temperature Pressure Saturated)
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Response Time:
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<4 s ( includes transport time and rise time)
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CO2 Resolution:
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0～69 mmHg: 0.1 mmHg
70～152 mmHg: 0.25 mmHg
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CO2 Accuracy:
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0～40 mmHg: ± 2 mmHg
41～150 mmHg : ± 8 % of reading
Above 80 breath per minute ± 10 % of reading
[NOTE]:Gas temperature at 25℃.
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CO2 Stability:
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Short / long Term Drift: Drift shall not exceed 1 mmHg maximum. Module will auto run zero calibration when drift exceed 1 mmHg.
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CO2 Noise:
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RMS noise of the module shall be less than or equal to 0.25 mmHg at 5 % CO2.
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Sampling Rate:
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100 Hz
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awRR Measurement Range:
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2～150 breaths per minute (BPM)
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awRR Accuracy:
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±1 breath
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EtCO2 Calculation:
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No routine user calibration required.
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Inspired CO2 Measurement:
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Range: 3～50 mmHg
Method: Lowest reading of the CO2 waveform in the previous 20 s
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PeRformance Specifications
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Energy Emitting Device:
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Proprietary High Efficiency IR Source
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Energy Detecting Device:
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Frequency Stable Thermopile
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Dimensions:
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77mm*52mm*28mm
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Weight:
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< 76 g
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Operating Temperature Range:
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5～50℃
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Shipping / Storage Temperature Range:
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-40～70℃
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Automatic Offset Calibration:
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Time and temperature based, as well as on-demand
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Input Voltage:
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5.00 Volts (± 5%)
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Interface:
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Highly configurable serial digital interface(TTL/RS232), CO2 and barometric waveform data, Breath Detect Algorithm data
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Pneumatics:
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On-board aspiration pump and flow controller
Configurable aspiration flows to 250 ml/min (±10%)
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Power Consumption:
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480 mW (typical with pump on)
1200 mW (extreme status)
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