1.General Introduction
Yokogawa FU24F is a four in one digital PH & ORP sensor which communicates through bi-directional digital communication modbus RS485 for pressure fluctuation process, 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, a strong pressure compensation mechanism is created. The build-in bellow ensures immediate interior pressure equalization to the outside pressure, making the sensor virtually insensitive to external pressure variations. A slight overpressure caused by the bellow tension, prevents fluid ingress and maintains a positive ion flow out of the sensor. This feature is of particular interest in pure water applications.
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 filling) LE glass tube: AR-glass Reference junction: Porous PTFE Earth pin: Solid Platinum O-ring: Viton Bellow system: Viton |
Functional specifications (at 25°C) | Isothermal point: pH 7 Glass impedance: Dome shape nominal 200MΩ, Flat Surface nominal 700MΩ Reference system: Double junction, Ag/ AgCl with saturated KCI 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) | Startup time sensor: < 60 sec 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℉) Conductivity: > 50μS/cm |
3.Model Selection
Main Code | Suffix Code | Description | |
FU24F | SENCOM® pH Wide Body Sensor | ||
Sensor tip | -FSM | Flat Surface Model | |
-NPT | Dome Shaped Model |
4.External Dimensions
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