External Sidestream ETCO2 Module

It is a kind of Low Flow Side stream Module. The new design is easier to match with monitor or anesthesia machine. The user just need to fix a 8-pin Lemo socket in the panel of the host, and connect the power of the host and dataline to an electrical outlet. This design will make maintenance much convenient. The output parameters include real time CO2 concentration, respiration rate, end-tidal CO2, inspired CO2, The C300 module includes a miniature CO2 sensor, barometric pressure transducer, sampling flow control and a miniature low-power vacuum pump. can measure atmospheric pressure automatically, and has pressure compensated function. The host sends commands and receives waveform, breath parameters and command responses on two asynchronous serial data lines (TTL or RS232 level).

LOW FLOW SIDESTREAM ETCO2 MODULE SPECIFICATIONS

Transducer Type	LH800 Sidestream CO2 sensor
Sample Rate	50 mL/min, ±10mL/min.
Principle of Operation	Non-dispersive infrared (NDIR) single beam optics, dual wavelength, no moving parts
Initialization Time	Ø Capnogram displayed in less than 5 seconds Ø Reaching full specifications within 10 minutes.
CO2 Measure Range	Ø 0 - 114 mmHg Ø 0 - 15% Ø 0 - 15.2kPa
CO2 Resolution	Ø 0.1 mm Hg 0 to 50 mm Hg Ø 0.25 mm Hg 50 to 114 mm Hg
CO2 Accuracy	Ø 0 - 40 mmHg ±2 mmHg Ø 40 - 114 mmHg ±5% of reading
Respiratory Rate	Ø Range 2 to 120 Breaths Per Minute (BPM) Ø Accuracy ±1 breath
Calibration	No routine user calibration required
Compensation	Automatic Barometer Pressure 400 - 800 mmHg. User selectable O2 / N2O compensation.
Voltage Requirements	5.0 VDC ±5%
Power Consumption	Less than 1.5 Watts typical.
Temperature and Humidity Operating	0° to 40°C, 10 to 90% RH, non-condensing
Storage	-40° to 70°C, <90% RH, non-condensing
Interconnection	Pin out: 1. VA 5.0V 2. Shield Shield 3. DGND Digital return 4. VSRC Unused 5. TxD Serial data from LH800 6. RxD Serial data from Host 7. AGND Analog return 8. SYNC Unused
Data Interface	Ø RS232, bi-directional, 19200 baud rate, standard N-8-1. Ø Fully compatible with Respironics LoFlo communication protocol
Data Output	CO2 gas concentration (mm Hg), End-tidal CO2, Inspired CO2, Respiratory Rate, Automatic barometric pressure compensation.