Fluid Control Systems Selected product range

322Digital pH Transmitter, Compact Version• Programmable pH-transmitter functionsfor all kinds of pH-measurement tasksSensors 8205Type 8205 can be combined with...Type S020Insertion fittingType 6642Solenoid valveThe compact pH-transmitter combines a pH-sensorand an electronic module with a display in an IP65enclosure.The sensor component consists of a replaceablecombination pH electrode screwed into the sensorhousing.The measured signal is conveyed to the transmittervia a coaxial plug. The PT1000 for automatic temperaturecompensation is a standard feature in thesensor housing.The transmitter component converts the measuredsignal, displays the actual value and computes theoutput signals.The pH-transmitter can be installed into a pipeby using Insertion fitting Type S020 or suitableinstallation materials. It can also be installed in tanksor containers by using an industrial immersion fitting.• Compact version with integrated pHelectrodes• Large range of process connections withvarious fittings• Multi language, menu-guided operationType 2031Technical dataDiaphragm valveType 2031Continuous controlType 8640/8644Valve islandsPipe diameter DN 15 to 200 (fitting Type S020, see pages 340-347)MaterialsHousing, cover, lid, nutFront panel folioWetted partsFittingSensor holderPt1000SealMeasuring rangeMinimal rangeSensor elementFluidMin. conductivityHousingFluid pressure / Fluid temperatureMax. pressure at max. temperatureDiaphragmReference electrolyteAccuracyAmbient temperatureRelative humidityFluid temperatureTemperature compensationPCPolyesterStainless steel (1.4404 / 316L), brass, PVC, PP, PVDFPVDFStainless steelFKM (EPDM included in delivery)0 ... 14 pH0.5 pH unit (i.e 6.7 to 7.2 corresponding to 4-20 mA)Electrode: UNITRODE pHClean, contaminated, with low conductivity or containingsulfides/proteins2 μS/cm (200 kΩ.cm)Glass shaft0-6 bar / 0-130 °C (0 - 87psi / 32 - 266 °F)4 bar (58psi)2 clogging free “Single pores”Polymer≤ ±0.2% depending on electrode calibration0 up to 60 °C (32 up to 140 °F)≤ 80%, non condensed50 °C / 122 °F (fitting in PVC) - 80 °C / 176 °F (fitting in PP)- 100 °C / 212 °F) (fitting in PVDF, stainless steel, brass)Automatic (integrated PT1000 or user programmed)- referencetemperature 25 °CFluid pressure PN6 (see pressure-temperature chart, page 341)Electrical connection Cable plug DIN EN 175301-803 or cable glands M 20 x 1.5Voltage supply cable Shielded; cross-section: max. 1.5 mm 2Protection classVoltage supplyCurrent consumption with sensorOutputRelaysIP65 with cable plug mounted and tightened12 - 30 V DC - filtered and regulated< 80 mA (with relays)< 20 mA (without relay)4-20 mA programmable (3-wire with relays, 2-wire without relay);proportional to pH or T °Cmax. load: 700 Ω at 30 V DC,400 Ω at 24 V DC, 100 Ω at 15 V DC2 relays, freely programmable, 3A, 230 V ACSubject to modifications