1.General Introduction
Yokogawa FU20F is a four in one digital PH & ORP sensor which communicates through bi-directional digital communication modbus RS485, it transmit and receive data when connected to Yokogawa’s FLEXA21 transmitter or to any PC with the SPS24 software installed, makes the sensor an excellent choice in general chemical environments. Same as FU20 analog sensor type, 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. and quick removal adapters that allow the user to easily remove and install sensors are available.
2.General Specifications
Items | Description |
Measuring principle | pH glass electrode, Silver Chloride reference, Solid Platinum electrode, Pt1000 temperature sensor |
Wetted parts | Sensor body: PPS 40GF (RytonTM with glass filing) Reference junction: Porous PTFE Earth pin: Solid Platinum O-ring: Viton |
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, Flat Surface< 4 min 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 Code | Description | |
FU20F | SENCOM® pH Wide Body sensor | ||
Model | -NPT | Dome Shape Model | |
-FSM | Flat Surface Model | ||
Options | /HCNF | Complete Hastelloy cleaning system | |
/FPS | Adapter F*40 from Noryl | ||
/NSS | 1” NPT, SS316 | ||
/NTI | 1” NPT, Titanium | ||
/BSS | 1” BSP, SS316 | ||
/BTI | 1” BSP, Titanium | ||
4.External Dimensions
5.Typical Installation
