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."
Relay, Batch, Direct Conductivity/Resistivity, H COMM (HART), 4-20mA Output, and PC COMM modules — every one field-installable without replacing the base unit.
Explicitly named for "Semiconductor Water Production" in GF Signet's own literature, rated to the 18.2 MΩ-cm ultrapure water benchmark.
Georg Fischer (GF Signet) — Real Catalog Spec Data
| Product Line | Model | Category | Material | Size / Capacity | Temp Rating |
|---|---|---|---|---|---|
| 2551 Magmeter | electromagnetic flow meter | Instrumentation | PVC full-bore w/ Titanium or Hastelloy electrodes | DN15-DN900 (1/2in-36in) | n/a |
| 2552 Magmeter | electromagnetic flow meter (metal) | Instrumentation | metal body | 2in-102in | n/a |
| Instruments | 8900 / 9900 / 9900-1BC / 9950 | Instrumentation | n/a - full specs pending Signet Instrumentation catalog capture | n/a | panel-mount displays/controllers, sensor-agnostic |
| Flow | 515 / 2536 / 2540 / 525 | Instrumentation | n/a - full specs pending Signet Instrumentation catalog capture | n/a | flow sensors (paddlewheel-style, distinct from 2551/2552 magmeters already in catalog) |
| pH/ORP | 2724-2726 / 2734-2736 / 2750-2751 / 2760 / 2764-2767 / 2774-2777 | Instrumentation | n/a - full specs pending Signet Instrumentation catalog capture | n/a | pH and ORP sensors + preamplifiers |
| Conductivity/Resistivity | 2818-2823 / 2839-2842 / 2850 | Instrumentation | n/a - full specs pending Signet Instrumentation catalog capture | n/a | conductivity/resistivity sensors |
| Pressure/Level | 2250 / 2450 | Instrumentation | n/a - full specs pending Signet Instrumentation catalog capture | n/a | hydrostatic pressure sensors, dual-use for pressure or level |
| Temperature | 2350 | Instrumentation | n/a - full specs pending Signet Instrumentation catalog capture | n/a | temperature sensor |
| Chlorine | 4630 | Instrumentation | n/a - full specs pending Signet Instrumentation catalog capture | n/a | amperometric chlorine analysis panel |
| Turbidity | 4150 | Instrumentation | n/a - full specs pending Signet Instrumentation catalog capture | n/a | turbidity analyzer |
| Chlorine Systems | 4630 Chlorine Panel System | Instrumentation | Acrylic flow cell, Polycarbonate housing, PVC/PTFE/FKM electrode | 0.02-2 / 0.05-5 / 0.1-20 ppm | 0-45C, 1-8 bar inlet |
| Chlorine Systems | 4632 Chlorine Dioxide Analyzer System | Instrumentation | Acrylic flow cell, Polycarbonate housing | 0.02-2 ppm ClO2 | 0-45C |
| Chlorine Systems | 8630 Chlorine/pH Transmitter | Instrumentation | PBT case, Neoprene gasket | free Cl 0-20ppm, ClO2 0-2ppm, pH 0-14 | n/a |
| Chlorine Systems | 2630 Amperometric Chlorine Electrode | Instrumentation | CPVC, PTFE membrane, FKM, Gold/Silver halide electrodes | 0.02-2 / 0.05-5 / 0.1-20 ppm | 0-45C, max 7psi membrane |
| Chlorine Systems | 2632 Amperometric Chlorine Dioxide Electrode | Instrumentation | CPVC, PTFE membrane, FKM | 0-2 ppm | 0-45C |
Sourced from Georg Fischer (GF Signet)'s own catalog documentation.
Level Transmitters & pH/ORP Electrodes
Type 2260 ultrasonic level transmitters (PP and PVDF body options) and Type 2724-2726 pH/ORP electrodes.
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.
Are GF Signet sensors used in semiconductor water systems?
Yes — the 2818-2823 conductivity/resistivity electrodes and 2839-2842 PVDF electrodes are both explicitly named for semiconductor water in GF Signet's own product literature, alongside R.O., deionization, and USP/WFI purified water applications. See the dedicated conductivity/resistivity sensors page for full specs, or LibertyCES's semiconductor & high-purity manufacturing page for the full manufacturer cluster.
What's the difference between the GF Signet 9900 and 9950 transmitter?
The 9900 is single-channel — one instrument, one parameter. The 9950 supports up to 6 sensors in one instrument, with the base unit shipping 2 channels already active. See the full 9900/9950 comparison and all 6 real add-on modules.
Get the right instrumentation for your process and chemistry
Ready to buy or need a fast answer? Call, text, or email James directly — (559) 395-5500 · [email protected].