Georg Fischer / GF Signet
Flow, pH/ORP, conductivity, chlorine, and level instrumentation — plus safety-critical process setpoints for chrome reduction and cyanide destruction.
What LibertyCES specifies from Georg Fischer / GF Signet
The 2536 PVC-body paddlewheel is explicitly rated for concentrated Sodium Hypochlorite 12.5% — an independent flow-instrumentation confirmation for this chemistry.
A real chemical-poisoning compatibility matrix — the 2764-2767 differential family rates "Better" against mercury, copper, lead, cyanide, and sulfide where general-purpose electrodes only rate "Compatible."
The 2823 conductivity cell (cell constant 20.0) is the only family explicitly rated for concentrated acids, bases, and cleaners.
Frequently Asked Questions
Which pH electrode should be used for a cyanide destruction process?
The 2764-2767 "Harsh Chemicals" differential electrode family, which rates "Better" against cyanide, sulfide, mercury, copper, and lead poisoning ions — general-purpose electrodes (2724-2726, 2734-2736) only rate "Compatible" against the same list.
What are the real pH and ORP setpoints for chrome reduction?
pH is lowered to 2.0-2.5 with an ORP setpoint of -300mV to -400mV, using sulfur dioxide, sodium sulfite, or sodium metabisulfite as the reducing agent. Lowering pH too far risks releasing hazardous sulfur dioxide gas — a real, explicit safety hazard.
Which GF Signet flow sensor is rated for sodium hypochlorite service?
The 2536 insertion paddlewheel sensor in its PVC-body variant (DN15-DN100) is explicitly named in the vendor's own literature as rated for concentrated Sodium Hypochlorite 12.5% applications.