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

Capnogram displayed in less than 5 seconds

Reaching full specifications within 10 minutes.

CO2 Measure Range

0 - 114 mmHg

0 - 15%

0 - 15.2kPa

CO2 Resolution

0.1 mm Hg      0 to 50 mm Hg

0.25 mm Hg     50 to 114 mm Hg

CO2 Accuracy

0 – 40 mmHg    ±2 mmHg

40 – 114 mmHg  ±5% of reading

Respiratory Rate

Range          2 to 120 Breaths Per Minute (BPM)

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

 RS232, bi-directional, 19200 baud rate, standard N-8-1

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.