Archive June 2018

FAQ list for ETCO2 Sensor

1.  Q: What are the requirements for the daily dimension of the CO2 module?

A: The CO2 sidestream module and the mainstream module of the Capnomed are not required to do any calibration in the process of daily use. We do range                  calibration  when the products leave the factory, and our design ensures that the measurement accuracy meets the requirements within the life cycle.


2.   Q: What is zeroing? When should we make zero?

A: When the mainstream module is connected to the monitor for the first time, it must make zero. When replacing the adapter type of the mainstream module, for       example, changing the disposable airway adapter to a reusable airway adapter, zeroing must be done. It is also recommended to make zero when replacing disposable airway adapters, but it is not necessary. The mainstream module is not allowed to make zero when there is no adapter or sidestream module without connecting the gas circuit. In the process of zeroing, people must ensure that there is no CO2 enter the zeroing gas circuit, including the CO2 of the patient’s exhaled breath. The zeroing takes about 15-20 seconds each time.


3.  Q: Is zeroing and calibration the same?

A: Zeroing is not calibration. For the mainstream module, the zeroing is to eliminate the impact of the replacement adapter on the results of the measurement, because the disposable adapters and the reusable adapter windows are different. For the sidestream module, the zeroing is to eliminate the difference of the water filter and the influence of the difference of the sampling gas circuit on the measurement result.


4.  Q: How to clean the CO2 mainstream module?

A: After the power off the CO2 mainstream module, the CO2 mainstream module should cool down at least 30 minutes. The following is a requirement for cleanliness. Damage caused by illegal cleaning will not be covered by our company’s warranty.





L-fitting connector can be used in a lot of occasions, and it is mainly applied to ETCO2 sampling in CapnoMed .  when intubated patients is sampling CO2, the L-fitting can be connected to the pipe of anesthesia machine or breathing machine. Then the extended sampling line sends a little of gas to a monitor to survey. L-fitting Connector can be reused (actually it is disposable in some developped countries). Before it is reused, it must be disinfected. Once the connector is aging due to long-time disinfection, it must be replaced immediately.



Water Filter

 The Water Filter is intended for docking with Receptacle and connecting to an  Sampling Line in a sidestream gas monitoring system. 
•The Water Filter Includes  a hydrophobic fiber to protects the Multigas Analyzer from humidity, secretions, bacterial contamination and dust.
•The Water Filter has the ability to remove water and moisture from the gas sample flow,to provide extended and accurate performance in demanding clinical applications.
•The Water Filter has very little dead space, to provide more accurate performance at higher breath rates, a tangible advantage when used in neonatal applications


MEMO ETCO2 Capnograph

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Product Name: Memo ETCO2 Capnograph ( Mini Capnograph)

Model No. : CMZ60MEMO

Technical Specification

Description Compact, battery powered, quantitative capnograph for mainstream CO2 monitoring of adult, pediatric and infant patients.。
Measurements CO2 partial pressure and respiratory rate
Measuring principle 2 channel NDIR type gas analyzer,No moving parts
Warm up Waveform displayed within 10 seconds, meets specifications within 2 minutes (at 25°C room temperature)
Calibration No routine calibration required
CO2 Range 0~99 mmHg

0~9.9 %

0~9.9 kPa

CO2 Resolution 1mmHg or 0.1kPa or 0.1%
CO2 accuracy 0~40mmHg       ±2 mmHg

41~99mmHg      ±8% of readings

When RR is above 80 bpm     ±12% of readings

Drift of CO2 measurement


Short drift: Less than 1 mmHg offset in 4 hours

Long drift: Meet measurement accuracy requirements within 120 hours

CO2 noise Noise RMS less than 1mmHg at 5% CO2
Total system response time Less than 500ms
Recovery time after

defibrillator test

Respiratory rate 3~150 bpm
Respiratory rate accuracy ±1 bpm
ETCO2 Calculation Method Peak of the expired CO2 waveform
Compensation Built-in atmospheric pressure sensor, automatic pressure compensation
Display 128 *128 pixels 1.44 inch TFT color display
Dimensions 51 x 43 x 45 mm
Weight <65 g  (Included batteries)
Mechanical robustness Withstands repeated 1 m drops.

Meets the shock and vibration requirements for transport of

EN ISO 80601-2-55:2011 clause and

EN 1789:2007 clause and 6.4.1.

Operating conditions Temperature:0 – 40 ℃

Humidity:<90% (non-condensing)

Atmospheric pressure:50-120 kPa

Storage conditions Temperature:-20 – 70 ℃

Humidity:<95% (non-condensing)

Atmospheric pressure:50-120 kPa