Cost model · BeamCell® extractive vs NDIR
Where a cheaper analyzer stops being cheaper
NDIR is the low-capital option and will stay the low-capital option. Whether it is the low-cost option depends on how often it has to be recalibrated and what a wrong reading costs you. Both of those are yours to set, on both sides.
NDIR analyzer
BeamCell® extractive analyzer
Cost of a wrong reading
This term decides the comparison, so it sits outside both columns and applies to both. A measurement error means a reading acted on that should not have been, or one missed that should have been caught. Set the frequency you have actually seen for each instrument. If you have no basis for a number, set both to zero and read the result as capital and running cost only.
Shared assumptions and financing
Enter your figures above
The model runs as soon as the fields are filled.
From capital and installation
-
-
From running cost
-
-
From measurement errors
-
-
Cumulative cost of ownership, present value
NDIR BeamCell Crossover
| Cost line | NDIR | BeamCell | Difference |
|---|
Method. Capital and installation fall in month zero. Source replacements fall at each multiple of the replacement interval. Calibrations, service and error costs accrue evenly across the year. Everything is discounted to present value at the rate you set. The measurement point count multiplies both sides equally.
Read the three contribution figures rather than only the total. NDIR costs less to buy and that will not change, so the capital line runs against the BeamCell in almost every configuration. The result turns on the other two, and the error term in particular. If you set both error frequencies to zero and the BeamCell still comes out ahead, the case stands on running cost alone and does not need an argument about selectivity.
The starting values are illustrative placeholders, not published prices for any product and not a quotation for any competing instrument. Nothing here prices detection limit, measurement range, response time or certification scope, and those differences are usually the reason to choose one measurement principle over the other. If your application does not have a selectivity or drift problem, cost is unlikely to be the argument that decides it.
