Philips Respironics LoFlo Sidestream CO2 Sensor Module

Philips Respironics LoFlo Sidestream CO2 Sensor Module

Philips | SKU
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Cutting edge CO2 technology for patients in the ICU, OR, and EMS applications.

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Philips Respironics LoFlo Sidestream CO2 Sensor Module


As a recognized global leader in capnography, Respironics has been providing innovative and cost effective solutions for over 20 years. The LoFlo sensor is the ideal capnography solution for all your CO2 monitoring requirements. Respironics provides comprehensive technical, clinical, and marketing support to help meet the growing needs of your business.


  • Ideal for non-intubated patients
  • Proprietary sample cell protects internal NDIR components from contamination
  • Common connector allows easy exchange between mainstream and sidestream monitoring
  • Robust and long life pump reduces periodic maintenance
  • No calibration required
  • Unique accessories & supplies for all patients
  • Private label option

Internal or External Application...

Respironics offers the LoFlo engine for internal integration into your monitoring system.

It's your choice!

The LoFlo sensor's small, lightweight package is designed to be shared. It is easily moved from room to room to connect to your device or during transport.

Mounting Options!

Mount the sensor to a bed rail, IV pole, or leave as part of the system cabling.



Sample Flow Rate  50 mL/minute ±10 mL/minute 
Principle of Operation  Non-dispersive infrared (NDIR) single beam optics, dual wavelength, no moving parts 
Initialization Time  Capnogram, displayed in less than 20 seconds, at an ambient temperature of 25°C, full specifications within 2 minutes 
CO2Measurement Range  0 to 150 mmHg, 0 to 19.7%, 0 to 20 kPa 
CO2 Resolution 
0.1 mmHg  0 to 69 mmHg
0.25 mmHg 70 to 150 mmHg
CO2 Accuracy 
0 – 40 mmHg  ±2 mmHg 
41 – 70 mmHg  ±5% of reading 
71 – 100 mmHg  ±8% of reading 
101 – 150 mmHg  ±10% of reading 
Above 80 BPM ±12% of reading 
CO2 Stability  Short term drift: Drift over four hours shall not exceed 0.8 mmHg maximum 
Long term drift: Accuracy specification will be maintained over a 120-hour period 
CO2 Noise  RMS noise of the sensor is less than or equal to 0.25 mmHg at 5% CO2
Sampling Frequency  100 Hz 
Respiration Rate Range  0 to 150 Breaths Per Minute (BPM) 
Respiration Rate Accuracy  ±1 breath 
Compensations (Supplied by Host)  Barometric pressure: 400 mmHg to 800 mmHg 
Operator selectable O2, N2O, HE and agent compensation 
Calibration  No routine user calibration required 
Sample Cell/Filter  Proprietary single patient use sample cell and inline filter are integrated with the sample line which effectively eliminates contamination of the internal system 
Nasal Sampling Kits for Non-intubated Patients  Nasal CO2 or CO2 with O2 delivery (Adult,Pediatric,Infant-Neonatal) 
Nasal/Oral CO2 or CO2 with O2 delivery (Adult, Pediatric) 
Airway Adapter Kits for Intubated Patients  Adult/Pediatric with and without dehumidification tubing
Pediatric/Infant, low deadspace, with and without dehumidification tubing 
Taper meets ISO 5356-1 
Sample Kit Hours of Use  Nasal and Oral/Nasal Cannulas without nafion – up to 12 hours
Nasal and Oral/Nasal Cannulas with nafion – up to 120 hours
Airway Adapter Kits without nafion - up to 12 hours 
Airway Adapter Kits with nafion - up to 120 hours 
Sample Cell Detection  Insertion automatically turns sampling pump on. Removal automatically turns sampling pump off 
Flow Control  Via ΔP measurement across a capillary tube 
Scavenging Port  Yes 
Voltage Requirements  5.0 VDC ±5% 
Power Rating  Rated input: Less than 1.3 Watts typical 
Steady state less than 2.0 Watts maximum on power up (warm up) 
Interconnection  Standard - Lemo Redel 8-pin plastic 
LoFlo and CAPNOSTAT are interchangeable with the host monitor Common connector allows easy exchange between mainstream and sidestream monitoring 
Temperature and Humidity Operating: 0° to 40°C, 10 to 90% RH, non-condensing 
Storage: -40° to 70°C, <90% RH, non-condensing 
Water Resistance  IPX4 . Splash-proof (When sample cell is inserted in sample cell receptacle) 
Shock Impact  IEC TR 60721-4-7 Class 7M3 (designed to withstand environments subject to significant vibrations or high shock levels)
EN60068-2-27 shock 
EN60068-2-64 random vibration 
Data Interface  RS232, bi-directional, 19200 baud, standard N-8-1 
Data Output  CO2 gas concentration (mmHg), end-tidal CO2, inspired CO2, respiratory rate
Gas and barometric pressure compensated when supplied by host 
Regulatory  Designed to meet IEC 60601-1-2, EN55011 - CISPIR 11 Class B (Radiated and Conductive Emissions), IEC 61000-4-2 Electrostatic Discharge Immunity, IEC 61000-4-3 Radiated Immunity 
Designed to comply with 93/42/EEC (MDD CE Marking), FDA Standards, ISO21647, and Medical Electrical Equipment performance requirements for the basic safety and essential performance of respiratory gas monitors 


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