Saw this write up and thought i would share,a bit of a way to go but sounds promising. Made in the USA you can google images and further write ups.
We didn't want to announce our next product, the ION Director, before we have ALL facts, especially prices and availability, and all technical details, because announcing too early can lead to unnecessary pressure and dissatisfaction - so we tried to avoid that.
BUT: So many people who knew that we are working on a solution for measuring Calcium had been asking the last weeks, we felt that it is overdue to announce now at least the most important (and already firm) facts.
This is already clear about the ION Director:
will measure (at least) Calcium and Magnesium
no reagents, works with sensors (but still needs calibration fluid)
several measurements per day (customizable), no permanent measurement
needs a Doser Standalone, ProfiLux 3 or ProfiLux 4 as a "brain" for operation, connected over ProfiLux Aquatic Bus (similar principle as KH Director)
needs 2 or 3 pumps (still under development): sample in/out, calibration fluid in + out
can also control Ca and Mg (via changing dosing amounts or switching sockets)
small sample amount
usual features as for our other measurements: alarms, graphs, etc.
will be shown at Macna 2019
sales start November 2019
No final information about prices yet. No details about the probes resp. their lifetime can be announced at this point.
Our main goals are to have very accurate readings, long probe lifetime and reasonably priced replacement probes. We are working hard with our probe vendor on that.
Our tests are extremely promising, this is how it will look like (maybe changes in details):