Selection checklist · Purchasing perspective · Published: October 16, 2026 Key Takeaways NEMA and IP measure different things. IP codes cover only solid-object and water ingress, while NEMA types additionally test corrosion, external icing, oil exclusion, gasket aging, and construction — so the conversion between them is one-way and approximate [1][2]. Per the ANSI/NEMA 250…
Technical deep dive · Technical perspective · Published: October 16, 2026 Key Takeaways Bubbles are a strictly positive interferent in scattered-light turbidity measurement: air bubbles reflect and scatter light the same way particles do, producing a false-high reading [1][3]. Bubbles reach the flow cell by two distinct paths — mechanical entrainment (pump cavitation, turbulence, high…
Technical Deep Dive · Technical Perspective · Published: October 16, 2026 Key Takeaways The softener injector is a venturi-style eductor with no moving parts: flow through a restricting nozzle creates a low-pressure zone that pulls brine from the salt tank into the resin bed [1]. For upflow brining, published design guidance puts the optimum brining…
Technical Deep Dive · Technical Perspective · Published: October 16, 2026 Key Takeaways No electrochemical or optical sensor responds to exactly one species. For ion-selective electrodes (ISEs), the interfering contribution is quantified by the potentiometric selectivity coefficient in the Nikolsky-Eisenman equation [1]. Ammonium ISEs built on the nonactin ionophore show significant interference from potassium, and…
Spec Review · Technical Perspective · Published: October 16, 2026 Key Takeaways PTFE offers the widest chemical compatibility window of any common seat material and a service range of about -200 °C to +260 °C, but it creeps under sustained load and scuffs in abrasive media [1]. EPDM is the elastomer of choice for water,…
Board Briefing · Decision-Maker Perspective · Published: October 16, 2026 Key Takeaways Condensate is not waste water. Returned condensate carries up to about 25% of the original heat energy of the steam, and well-run return systems typically deliver fuel savings on the order of 10-15% [1][2]. The return line is also a diagnostic channel. Low…