As the principle designer of the Abyss TekCheck concept I can tell you first hand after mixing trimix for more than 10 years the Abyss TekCheck just makes the job easier.
We started looking at bringing out a helium analyzer more than three years ago but the cost of the technology then was just prohibitive to bring to the streets. Then after years of researching companies who had the patents on the small helium sensors we were able to make a unit that we can put on the streets for end users in the $1000 range.
While some companies just have a helium only unit we opted for the small additional cost to include the oxygen analyzation module in one complete unit. We think it's a better way to go.
The really sweet part about using the Abyss TekCheck is that it is temperature has little effect on the helium analysis. So, regardless of what the gas temperature is you are always sure of the helium content. This is important for field mixing.
My first helium analyzer was a huge thermal conductivity unit made for industrial use that weighed in at almost 50 lbs and took 12 hours to warm up. Contrast that to the TekCheck that has instant on and ready to sample with the flick of a switch.
If you are using trimix, buying trimix, or selling trimix (or other helium based breathing mixtures) and are not analyzing both the helium and the oxygen then you are doing yourself or your customers a disservice. The cost is reasonable enough today to not take chances to mathematical mixing errors.
For those who would like a copy of the TekCheck User's Guide, just drop me an email off-board and I will be happy to email you one.
Warm regards,