Sidestream ETCO2 Sensor LH800

LH810 is an external plug and play sidestream co2 sensor. It does not occupy any host space and connects to host just with one eight-pin plug. LH800 features cutting-edge technology for measurement of instantaneous CO2 concentration, respiration rate, end-tidal CO2 concentration, inspired CO2 concentration, inspiration time and expiration time. It is generally used in patient monitor and anesthetic machine. With a sampling rate low to 50mL/min, it is ideal for use on adult, pediatric and infant patients; patients undergoing procedural sedation; and short- term monitoring of intubated patients. 

Technical 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: 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