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Shenzhen Setolink Electronic Co., Ltd.

China Manufacturer with main products: Auto Cable, Medical Cable, Complete Set of Wire Harness

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External Sidestream EtCO2 Sensor

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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
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
No routine user calibration required
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
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.

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