1.General Introduction
Yokogawa FU20 is a four in one analog PH & ORP sensor which applicable for slurry, solids, high salt concentration process, it owns a wide chemical resistant PPS 40GF body sensors (26 mm diameter) hold four separate measuring elements, pH, reference, temperature, ORP measure elements. Installation is simple with the integrated industrial 3/4” tapered thread. Temperature fluctuations are compensated to extend the sensor life which is targeted at applications where simplicity will result in accurate and reliable pH- or redox measurement. The Quick Release Adapters for the FU20 allow easy removal of the sensor for cleaning and calibration.
2.General Specifications
Items | Description |
Measuring principle | pH glass electrode, Silver Chloride reference, Solid Platinum electrode, Pt1000 temperature sensor |
Wetted parts | Sensor body: NPT, FSM: PPS GF40: FTD : PVDF- (GF25+TZ24) O-ring: Viton-FTS and FSM,FTD and NPT Reference junction: Porous PTFE |
Functional specifications (at 25°C) | Isothermal point: pH 7 Reference system: Ag/ AgCl with saturated KCI Glass impedance: Dome shape nominal 200MΩ, Flat Surface nominal 700MΩ Junction resistance: 1 to 15 kΩ Temperature element: Pt1000 to IEC 751 Asymmetry potential: 8 ± 15 mV Linearity PH (Slope): > 96 % (of theoretical value) |
Dynamic specifications (at 25°C) | Response time pH step (7 to 4): < 15 sec for 90% Response time temp step (10°C): Dome shape< 1 min for 90%, Flat Surface< 4 min for 90% Stabilization time (0.02 pH unit/10 s): < 2 minutes |
Operating range | pH: 0 to 14 ORP: -1500 to 1500 mV rH: 0 to 100 Temperature: Dome shape -10℃ to 105℃ (14℉ to 221℉), Flat surface 15℃ to 105℃ (59℉ to 221℉) Pressure: 0 to 10 bar (0 to 142 PSIG) Conductivity: > 50μS/cm |
3.Model Selection
Main Code | Suffix Codes | Description | |||
FU20 | Wide Body sensor | ||||
Cable length | -03 | 3 m cable, not available for FTD, FTS and MTS | |||
-05 | 5 m cable, not available for FTD, FTS and MTS | ||||
-10 | 10 m cable, not available for FTD, FTS and MTS | ||||
-20 | 20 m cable, not available for FTD, FTS and MTS | ||||
-VP | No Cable; Vario Pin connector | ||||
-VS | No Cable; Vario Pin for SENCOM connector | ||||
Temp. Sensor | -T1 | Pt1000 | |||
-T2 | Pt100 (not available for FTD, FTS,MTS and VS) | ||||
Model | -NPT | PPS body / Tapered Thread / Dome shaped | |||
-FSM | PPS body / Tapered Thread / Flat Surface | ||||
-FTD | PVDF body / Tapered Thread / Dome shaped | ||||
-FTS | PVDF body / Tapered Thread / Salt Sensitive membrane/ Silicone sealing | ||||
-MTS | PVDF body / Tapered Thread / Salt Sensitive membrane/ FFKM sealing | ||||
Options | /HCNF | Complete Hastelloy cleaning system | |||
/FPS | Adapter F*40 from PPO | ||||
/NSS | 1” NPT, SS316 | ||||
/NTI | 1” NPT, Titanium | ||||
/BSS | 1” BSP, SS316 | ||||
/BTI | 1” BSP, Titanium |
4.External Dimensions
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