Technical Specifications

Transducer Type: 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: 0º to 40ºC, 10 to 90% RH, non-condensing

Storage: -40º to 70ºC, <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.