LH800 - External EtCO2 Module
Category: EtCO2 Sensor  Publish Time: 2012-09-24 09:37 
LH800 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 50 mL/min, it is ideal for use on adult, pediatric and infant patients; patients undergoing procedural sedation; and short- term monitoring of intubated patients.
LH800 - External EtCO2 Module

Model:LH800

Product Introduction

LH800 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 50 mL/min, it is ideal for use on adult, pediatric and infant patients; patients undergoing procedural sedation; and short- term monitoring of intubated patients.

 

Product Features

  • State-of-the-art Non-dispersive infrared (NDIR) technology, dual wavelength, no moving parts
  • Breath-by-breath CO2 monitoring
  • Sample rate low to 50 mL/min
  • Barometer pressure and temperature compensation
  • Range calibration in 0 – 15% by manufacturer
  • Fast warmup time ensures full accuracy within 5 minutes
  • Oxygen, N2O and anesthetic compensation for accurate measurement
  • Low power consumption less than 2W
  • Fully compatible with Respronics Loflo sensor module

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.

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