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pH measuring system for hygienic applications
The type 8201 pH measuring system is suitable for measuring absolute pH values in liquids between pH 0 and pH 12 at medium temperatures of up to 140°C and process pressures of max. 6 bar. Due to its hygienic design and the robust glass-free construction, this model is particularly suitable for use in hygienic processes. An example would be the production of foods and active ingredients, during which the pH value of liquid mediums – including those which are viscous or contain solids – is measured. The pH electrode’s extremely smooth enamel surface prevents the medium from sticking and is very easy to clean in line. Due to its robust design and high temperature and chemical tolerance, the electrode stays in the process even during a CIP purification. This means that expensive retractable fittings can be dispensed with.
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General Technical Data
Product properties |
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| Material | Please make sure the device materials are compatible with the fluid you are using. Detailed information can be found in chapter “3.1. Chemical Resistance Chart – Bürkert resistApp” on page 5. |
| Sensor tube | Enamelled steel tube |
| Diaphragm | Ceramic |
| Process connection | Stainless steel 1.4404 |
| Electrode head | PVDF |
| Seal | EPDM |
| Electrolyte vessel | Stainless steel (1.4301) |
| Dimensions | Detailed information can be found in chapter “4. Dimensions” on page 6. |
| Compatibility | Any tanks or process pipelines which are fitted with • pH armature Type 8200 or • Fitting Type 8201 or • Flange connection adapted for GEA Tuchenhagen VARINLINE process connection (DN 50…DN 125) or • Clamp 2″ See data sheet Type 8200 or chapter “4.2. Fittings Type 8201” on page 9 or chapter “9.4. Ordering chart” on page 14 for more information. |
| Temperature sensor | Pt1000 integrated within the holder |
| Measuring variable | Absolute pH value |
| Reference system | • Aseptic ground (ceramic) diaphragm • Reference electrode Ag/AgCI • KCI electrolyte 3-molar sterile (conform to FDA) |
| Measuring range | 0…10 pH (for up to 12 pH, see chapter “5.2. pH/temperature diagram” on page 11) |
| Measuring chain zero point | 8.65 ± 1 pH1.) |
| Measuring chain isotherm point pH0 | 1.0 ± 1 pH; Uis = 440 mV1.) |
| Product accessories Suitable transmitter | • Multi channel and multi function multiCELL transmitter/controller Type 8619 See data sheet Type 8619 multiCELL for more information. • Devices with isotherm option |
Performance data |
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| Measuring deviation | Max. ± 0.05 pH, depending on calibration |
| Repeatability | 0.05 pH |
| Slope of measuring chain | 56…59 mV/pH1.) at 25 °C (77 °F) |
| Measurement chain potential | + 600…- 400 mV |
| Inner resistance of measuring chain | 109…1010 Ω at + 25 °C (77 °F) |
| Diaphragm resistance | Approx. 20…200 kΩ |
| Insulation resistance | ≥ 1012 Ω |
| Inner capacity (with connection cable) | ≤ 5 nF |
| Inner inductivity (with connection cable) | Negligibly low |
| Thermal shock resistance | ∆T = 120 °C (248 °F) |
| Corrosion resistance | See chapter “5.1. Sensor corrosion resistance diagram” on page 10. |
Electrical data |
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| Output signal | • pH value: analog signal, to be connected to multiCELL transmitter/controller Type 8619. See data sheet Type 8619 multiCELL for more information. • Pt1000: 2-wire |
| Medium data | |
| Fluid temperature | 0…+ 140 °C (+ 32…+ 284 °F), see chapter “5.2. pH/temperature diagram” on page 11. |
| Fluid pressure | – 1…+ 6 bar rel. (- 14…+ 87 PSI) |
| Fluid conductivity | Min. 1 µS/cm |
Process/Port connection & communication |
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| Process connection | Through adaptation sets for • pH armature Type 8200 in stainless steel or • Hygienic fittings Type 8201 – Weld connection DN 25 (Ingold welding nozzle) – Weld connection DN 30, other on request – Stainless steel connecting pieces 1.4404 or • Flange connection adapted for GEA Tuchenhagen VARINLINE process connection (DN 50…DN 125) or • Clamp 2″ See data sheet Type 8200 or chapter “4.1. pH probe enamel” on page 6 or chap-ter “9.4. Ordering chart” on page 14 for more information. |
| Electrical connection | 6 pin gold-plated Variopin connector |
*For selecting thecorrect product please refer to the technical data, images and notes for proper use according to the data sheet, or contact Flu-Tech directly.
สอบถามข้อมูลเพิ่มเติม ติดต่อเรา :
02-384-6060 (อัตโนมัติ) [email protected] บริษัท ฟลูเทค จำกัด Flu-tech @flutech.co.th