Tag Archives: CO2

SprintIR6S, World’s Fastest NDIR CO2 Sensor

Gas Sensing Solutions (GSS) Ltd is a designer and manufacturer of low power, high speed Non-Dispersive Infrared (NDIR) carbon dioxide gas sensors. Recently, it has claimed a new speed record for its SprintIR6S NDIR CO2 sensor.

The new sensor comes with response rates that had never been reached before by any other NDIR CO2 sensors. It can take up to 20 readings per second, and has a six-times faster response rate than the current SprintIR.

According to Ralph Weir, GSS’ CEO, the sensor uses LEDs and photodiodes to measure differential light absorption between light at 4.2 and 4.4 μm. So, they succeeded to develop ultra-speed sensor, while other detectors take several seconds or even minutes to take a reading.

“Our LEDs, by contrast, are Solid State emitters, and illuminate almost instantly. With the new SprintIR6S, we’ve also minimised the sample volume down to only 2ml, which enables us to achieve our fastest ever response rates.”
~ Ralph Weir

The SprintIR6S is less than a cubic inch in dimension with 23.8mm in diameter and 24mm tall. It operates at a range between 3.25V and 5.5V and consumes only 35mW. SprintIR6S is also available in measurements ranges from 0% to 100%.

Main Specifications of SprintIR6S

  • Warm-up Time: < 30 seconds
  • Operating Conditions:
    • 0°C to 50°C (Standard)
    • 0 to 95% RH, non-condensing
  • Recommended Storage: -30°C to +70°C
  • Sensing Method:
    • Non-dispersive infrared (NDIR) absorption
    • Patented Gold-plated optics
    • Solid-state source and detector
  • Sample Method: Flow through
  • Measurement Range: 0-5%, 0-20%, 0-100%
  • Accuracy: ±70 ppm +/- 5% of reading (100% Range ±300 ppm +/-5% of reading)
  • Non Linearity: < 1% of FS
  • Pressure Dependence: 0.13% of reading per mm Hg in normal atmospheric conditions
  • Operating Pressure Range: Atmospheric pressure range. Lower and higher pressures require more advanced pressure compensation.
  • Response Time: Flow Rate Dependent – see graph below. Response time also depends on user configurable digital filter settings.
  • Power Input:
    • 3.25 to 5.5V. (3.3V recommended).
    • Peak Current 33mA.
    • Average Current <12mA.

Applications of SprintIR6S are those which require capture of rapidly changing CO2 concentrations. Such as capnography, fitness testing, metabolic assessment, sports science, veterinary medicine, bio-medical, and incubators.

For more information and detailed specification, you can download the datasheet, or contact GSS to order or for more information.

CO2, temperature and humidity monitor

pic-front-panel3-600

An open source CO2 monitoring project from Roving Dynamics:

The project described below uses a MH-Z16 or MH-Z19 CO2 sensor and a DHT-22 (or DHT-11 if less accuracy is required) to measure the Temperature and Humidity. It has a 4 line by 20 character LCD Display to show the current readings and status, a warning alarm and two relays which can be triggered on a low CO2 (Generally above 1000 ppm) normally to switch on an extractor fan and a high level (4000 ppm) which will trigger a warning device such as an external alarm. There are two models I used the 0 to 5000 ppm device here but the code will be the same for the 0 to 10000 ppm model

CO2, temperature and humidity monitor – [Link]