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New in box. Max. power 10 W Max. light output 1198 lm High quality TIR optics FWHM 4,9° Aerospace grade anodized aluminium light head that optimizes head dissipation and protecting LED electronics and optics Constant current LED driver 3 modes 25% pwm 50% pwm 100% pwm Piezo switch Solid...

MD61/62 are not linear, I am sure. More or less I did the same what you suggested and detected the sensor's sensitivity curve. The detected curve gives a pretty similar result how you make the correction with fixed values in your code. Regarding to CO, I have never measured CO and do not know...

Have you ever tested how linear the output?

The sensor has a separate pcb and it is soldered on it. The small and the main pcb then connected together with wires. You can see it above.

Thank you for the info. As I see it is only a sensor without temperature compensation. It would make the design more complicated. And it is non-linear. I might try this one later: https://www.winsen-sensor.com/d/files/ZE15-CO.pdf I could buy 100% He from a local gas station but it would cost...

Bill of material WEMOS LOLIN or compatible ESP32 board 3.2 inch 320*240 SPI Serial TFT LCD Module Display Screen with Touch Panel Driver IC ILI9341 for MCU DC-DC Step Down Converter Module LM2596 DC 4.0~40 to 1.3-37V Adjustable Voltage Regulator Adjust it to 3V output! 16 Bit I2C...

I have used this analyser for a few times but I have never noticed this functionality. A friend of mine has it. But anyway, MOD display is only a confortable function (mine shows the calculated values for 1.2, 1.4 and 1.6 pO2 without pressing any button) and more usefule for novice divers. For...

Components on my website are much more professional than this analyzer, mostly cnc machined parts or contains only high quality industrial grade components. Some of them is in stock and some of them made on request. Let me know in pm if you are interested in any of them. But this is another...

Calibration with 100% O2 and then measuring EAN32

You can use N2, but most probably Argon or Helium is easier to access for divers. If you disconnect the O2 sensor you can also calibrate it electrically to zero. But it is less accurate.

Thank you for the info, I will check it. I do not refresh the whole screen, only characters and their background. So there is no flickering. mp4: analyzer.mp4

Max. power 18 W (XHP-50.2 or XML-2 LED) Max. light output 1955 lm Color temperature 5000 K FWHM 4,9° Anodized aluminium light head Constant current LED driver (3 modes) 25% pwm 50% pwm 100% pwm Adjustable heating (3 modes) + control led on the light head 25% pwm 50% pwm 100% pwm Piezo...

It has already been "cave" tested for a few times and works perfectly.

Nitrox analysis

It has not been calibrated to Helium. For nitrox I use 3 points calibration.

Drysuit Connector for Heating System Material: Delrin Cable gland: Nickel plated brass (6-8.5 mm cable diameter) NBR o-ring Compatibility: APEKS inflator valve Condition: New Without cable! Price: 55 EUR+shipping